Project Coin introduced several new features to Java 7 including diamond syntax for type inference, multi-catch exception handling, try-with-resources for cleaner resource management, strings in switch statements, and underscores in numeric literals. NIO.2 expanded non-blocking I/O with new file system APIs and WatchService for monitoring directories. Performance was improved through parallel array operations and other concurrency updates. Java 8 will include lambda expressions and new date/time APIs.
This document provides an overview of Module 01 from a course on Java Enterprise Edition (JEE) and web application development. It covers the history and evolution of Java, the Java platform editions, key Java principles, and an introduction to the HotSpot Java Virtual Machine (JVM).
This document provides an overview of assemblies, strong names, and attributes in the .NET framework. It discusses the different types of assemblies and deployment, how to generate strong names for assemblies, and how assemblies are loaded and resolved. It also covers attributes in .NET - what they are, how they are used to provide metadata, and common attribute targets like methods, properties, and assemblies. Key types of attributes discussed include ObsoleteAttribute and DllImportAttribute.
The document discusses Java Naming and Directory Interface (JNDI), which provides a standard interface for Java applications to access naming and directory services. JNDI allows Java programs to lookup and bind objects to names and addresses. It provides a common way to access different directory services like LDAP, DNS, and file systems through a single API.
In this core java training session, you will learn JDBC Cont. Topics covered in this session are:
• JDBC Continued
• Introduction to Java Enterprise Edition (Java EE)
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
The document provides an overview and breakdown of the 70-536 .NET Application Development Foundation exam. It discusses exam basics such as objectives, format, and passing score. It also outlines exam tips and highlights important topics covered on the exam like .NET classes, security, serialization, and more. Specific areas are broken down by percentage of the exam. Resources for exam preparation are provided at the end.
The document summarizes new features introduced in Java 5 and Java 6. Java 5 introduced generics, autoboxing/unboxing, enhanced for loops, and annotations. Java 6 added support for XML processing and web services using annotations, the Rhino JavaScript engine, improved GUI APIs, and Java DB for database connectivity.
Java and Spring Data JPA: Easy SQL Data Access
Abstract
Presenter: Miya W. Longwe, MBA, MSE, Tech Lead, Staples, Inc, Framingham MA 01702
Accessing data repositories in various applications programming languages typically involves writing of tedious boilerplate lines of code. Some application development frameworks such as Spring have tried to make the experience more succinct by providing abstraction layers such as HibernateTemplate and JdbcTemplate, etc. Despite these APIs, the developers still spend a lot time writing repetitive code than concentrating on implementing business requirements. Developers at Spring, led by Oliver Gierke, introduced Spring Data JPA which “aims to significantly improve the implementation of data access layers by reducing the effort to the amount that's actually needed. As a developer you write your repository interfaces, including custom finder methods, and Spring will provide the implementation automatically”.
Spring Data JPA provides a powerful, out-of-the-box alternative to creating your own DAO framework. You declare custom repository operations on an interface, and the framework generates dynamic implementations (not code generation) automatically, based on conventions around method names. As part of the presentation, we'll also review a demo to look at Spring Java configuration (as opposed to XML configuration), and investigate the @Profile annotation – configuration details which may make life a bit easier in various ways when setting up unit testing of our repository classes, using out-of-the-box alternative to creating DAO framework, how to create custom repositories, pagination and support for custom queries among other features.
Presenter's Bio
Miya W. Longwe is a Senior Software Engineer and Tech Lead at Staples, Inc. where he is currently working on an initiative to re-platform the company’s ecommerce architecture to offer platform-driven, modular products that can be quickly customized, enhanced, and branded as needed.
Miya has been a software professional since 1997. His 16 years software development career includes working for large companies to small startups, building solutions for enterprises and consumers, working with a broad range of technologies.
Miya Longwe is a hands-on java developer. He believes that in order to be a relevant and effective software developer one needs to remain a deeply knowledgeable, up-to-date, and productive software developer. His research interests include model-driven engineering, domain specific languages, test driven development and project risk management.
Miya graduated from the University of Malawi (Lilongwe, Malawi) and has an MBA from the University of Wales Cardiff Business School (Wales, UK) and a Masters in Software Engineering from Brandeis University (MA, USA).
Occasionally, Miya can be spotted fishing the banks of the south shore (MA) with his two boys, William and Daniel.
This document provides an overview of Module 01 from a course on Java Enterprise Edition (JEE) and web application development. It covers the history and evolution of Java, the Java platform editions, key Java principles, and an introduction to the HotSpot Java Virtual Machine (JVM).
This document provides an overview of assemblies, strong names, and attributes in the .NET framework. It discusses the different types of assemblies and deployment, how to generate strong names for assemblies, and how assemblies are loaded and resolved. It also covers attributes in .NET - what they are, how they are used to provide metadata, and common attribute targets like methods, properties, and assemblies. Key types of attributes discussed include ObsoleteAttribute and DllImportAttribute.
The document discusses Java Naming and Directory Interface (JNDI), which provides a standard interface for Java applications to access naming and directory services. JNDI allows Java programs to lookup and bind objects to names and addresses. It provides a common way to access different directory services like LDAP, DNS, and file systems through a single API.
In this core java training session, you will learn JDBC Cont. Topics covered in this session are:
• JDBC Continued
• Introduction to Java Enterprise Edition (Java EE)
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
The document provides an overview and breakdown of the 70-536 .NET Application Development Foundation exam. It discusses exam basics such as objectives, format, and passing score. It also outlines exam tips and highlights important topics covered on the exam like .NET classes, security, serialization, and more. Specific areas are broken down by percentage of the exam. Resources for exam preparation are provided at the end.
The document summarizes new features introduced in Java 5 and Java 6. Java 5 introduced generics, autoboxing/unboxing, enhanced for loops, and annotations. Java 6 added support for XML processing and web services using annotations, the Rhino JavaScript engine, improved GUI APIs, and Java DB for database connectivity.
Java and Spring Data JPA: Easy SQL Data Access
Abstract
Presenter: Miya W. Longwe, MBA, MSE, Tech Lead, Staples, Inc, Framingham MA 01702
Accessing data repositories in various applications programming languages typically involves writing of tedious boilerplate lines of code. Some application development frameworks such as Spring have tried to make the experience more succinct by providing abstraction layers such as HibernateTemplate and JdbcTemplate, etc. Despite these APIs, the developers still spend a lot time writing repetitive code than concentrating on implementing business requirements. Developers at Spring, led by Oliver Gierke, introduced Spring Data JPA which “aims to significantly improve the implementation of data access layers by reducing the effort to the amount that's actually needed. As a developer you write your repository interfaces, including custom finder methods, and Spring will provide the implementation automatically”.
Spring Data JPA provides a powerful, out-of-the-box alternative to creating your own DAO framework. You declare custom repository operations on an interface, and the framework generates dynamic implementations (not code generation) automatically, based on conventions around method names. As part of the presentation, we'll also review a demo to look at Spring Java configuration (as opposed to XML configuration), and investigate the @Profile annotation – configuration details which may make life a bit easier in various ways when setting up unit testing of our repository classes, using out-of-the-box alternative to creating DAO framework, how to create custom repositories, pagination and support for custom queries among other features.
Presenter's Bio
Miya W. Longwe is a Senior Software Engineer and Tech Lead at Staples, Inc. where he is currently working on an initiative to re-platform the company’s ecommerce architecture to offer platform-driven, modular products that can be quickly customized, enhanced, and branded as needed.
Miya has been a software professional since 1997. His 16 years software development career includes working for large companies to small startups, building solutions for enterprises and consumers, working with a broad range of technologies.
Miya Longwe is a hands-on java developer. He believes that in order to be a relevant and effective software developer one needs to remain a deeply knowledgeable, up-to-date, and productive software developer. His research interests include model-driven engineering, domain specific languages, test driven development and project risk management.
Miya graduated from the University of Malawi (Lilongwe, Malawi) and has an MBA from the University of Wales Cardiff Business School (Wales, UK) and a Masters in Software Engineering from Brandeis University (MA, USA).
Occasionally, Miya can be spotted fishing the banks of the south shore (MA) with his two boys, William and Daniel.
The Java Naming and Directory Interface (JNDI) allows Java applications to look up and discover named objects in a directory service. JNDI provides a standard interface for naming and accessing resources such as databases. Distributed application components can use JNDI to locate other components and resources by name. The JNDI lookup method passes a name and returns the associated object, enabling access to resources without prior knowledge of implementation details or location.
JDK 1.6 introduced enhancements to collections like Deque and BlockingDeque. It added support for XML, web services, and annotations. New features included support for scripting languages via JSR 223, improved JDBC 4.0 support, and enhancements to AWT and Swing for application GUIs. The Java compiler APIs were also made accessible to programs.
The next release of the Java Standard Edition is scheduled for the beginning of 2010. In this session we'll review the latest feature list of what's in and what's out of the next version of the JDK.
An update on the latest news around JavaFX including the 1.2 release and the general availability of JavaFX Mobile for Windows Mobile devices.
This document provides an overview of basic Java concepts including Java files, class files, bytecode, JAR files, the Java Virtual Machine (JVM), Java Development Kit (JDK), Java Runtime Environment (JRE), heap memory, permgen space, and threads. It defines these terms and explains the relationships between Java files, class files, bytecode, and the JVM/JRE. Screenshots from JVisualVM are included to illustrate the heap, classes, and threads in use by Eclipse.
What is Java Technology (An introduction with comparision of .net coding)Shaharyar khan
A introductory slides for those who want to learn and know some basics of Java.Also for those persons who want to compare coding difference between Java and .net
This document provides an overview of core Java basics. It discusses:
- The origins and evolution of Java from its initial release in 1995 to current versions.
- Key characteristics of Java including being object-oriented, platform independent, simple, robust, and distributed.
- The Java environment setup and basic syntax including classes, objects, and methods.
- A simple "Hello World" example Java program.
- Primitive data types in Java like int, float, boolean and how they differ.
- Object-oriented programming concepts in Java such as abstraction, encapsulation, inheritance and polymorphism.
Carol McDonald discusses the key themes and technologies in Java EE 6, which was released on December 10, 2009. The major themes of Java EE 6 are right-sizing with modular profiles, extensibility through pluggability, and ease of development through features like dependency injection and managed beans. New and updated specifications in Java EE 6 include CDI 1.0, EJB 3.1, JPA 2.0, JSF 2.0, JAX-RS 1.1, and Servlet 3.0.
The document provides an introduction to Java and XML. It outlines the course objectives which are to introduce Java architecture, syntax, object-oriented concepts, exception handling, and packaging Java applications. It also aims to introduce XML and XML parsing. The session plan for day 1 includes a review of object-oriented concepts and an introduction to the Java architecture, basic constructs in Java, classes, objects, and features of object-oriented programming in Java.
The document discusses and compares Dalvik VM and Java VM. It states that Dalvik VM is used in Android and executes optimized .dex files and Dalvik bytecodes, while Java VM executes .class files. It also mentions that Dalvik VM uses register-based architecture while Java VM uses stack-based architecture. The document further discusses advantages of Dalvik VM like minimal memory footprint and how .class files are converted to .dex files. It provides comparisons between key aspects of both VMs.
Rapid application development techniques, favoring rapid prototyping over intensive planning, have become popular in the last few years. Although the "old-school" Java Web frameworks (such as Struts and JSF) are well suited for enterprise projects, their development cycle is often too slow and complicated for prototyping. Due to their nature, dynamic languages such as Ruby, Python, and Groovy are natural for fast prototyping and scaffolding. But is there a way to benefit the Java ecosystem without compromising simplicity and productivity? This presentation tries to answer this question by comparing, head-to-head, three leading Java RAD tools—SeamForge, Play, and Roo—by writing a full-blown Web application in each of them, comparing the pros and cons along the way.
CS266 Software Reverse Engineering (SRE)Reversing and Patching Java Bytecode
Teodoro (Ted) Cipresso, teodoro.cipresso@sjsu.edu
Department of Computer Science
San José State University
Spring 2015
Modularisation in Java 9 splits the Java language and JDK/JRE into modules. This includes modularising the OpenJDK source code and runtime images to improve structure, reduce dependencies, and allow for smaller custom runtimes using jlink. The Java Platform Module System (JSR 376) introduced modules that define dependencies and exported/opened packages, allowing Java code and the JDK to be modularized. Hands-on sessions demonstrated creating modules, using jlink to build custom runtimes, and migrating non-modular code to Java 9.
The document compares the J2EE and .NET platforms, providing a layer-by-layer comparison of their infrastructures. It discusses similarities and differences in areas like runtime systems, object models, statements, exceptions, base classes, multithreading, deployment, component models, and database access. Key similarities include support for interfaces, inheritance, namespaces/packages, and reflection APIs. Differences include .NET's unified treatment of value and reference types and support for attributes, indexers, and operator overloading.
Java 7 and 8, what does it mean for youDmitry Buzdin
Java 7 and 8 introduced several new features and enhancements including Project Coin language changes to simplify coding, invokedynamic support for dynamic languages, try-with-resources for improved resource management, and improved concurrency utilities. Oracle's priorities for Java include supporting a vibrant ecosystem, generating revenue through Java support and management tools from JRockit, and lowering costs by converging JRockit and HotSpot features in future versions.
Java Deserialization Vulnerabilities - The Forgotten Bug ClassCODE WHITE GmbH
This document discusses Java deserialization vulnerabilities. It provides an introduction to how Java serialization works and what the security issues are. Specifically, it describes how an attacker can exploit vulnerabilities to remotely execute code on a server by deserializing malicious objects. The document gives examples of past vulnerabilities found in various Java applications and frameworks. It also provides tips for finding vulnerabilities and generating payloads to demonstrate exploits.
Serial Killer - Silently Pwning your Java Endpoints // OWASP BeNeLux Day 2016Christian Schneider
In this session we begin with modelling the attack surface of Java deserialization, which often leads to remote code execution (RCE), by showcasing vulnerabilities we found in modern and widely used applications and frameworks. We extend existing research about risks of deserialization broadening the attack surface. After a live demo of getting a Meterpreter shell in a modern Java endpoint setup we delve into the exploitation styles for this vulnerability to lay the foundation of the first of three key takeaways for the attendees:
The first key takeaway is identification of test types that should be executed during a dynamic assessment of an application in order to find this kind of vulnerability. This includes analyzing the deserialization interface and using blackbox tests to create payloads with gadgets matching the application’s classpath to verify the RCE. Discussion extends to cover indirect deserialization interfaces that use non-binary data formats, such as XML-based interfaces, which can also act as a driver for deserialization within the application.
The next key takeaway covers the realm of static code analysis (SAST). We present code patterns security reviewers should look for when doing whitebox assessments of applications or frameworks. This is especially interesting for code offering dynamic functionality including AOP, generic mappings, reflection, interceptors, etc. - all of which have a high probability of including code that can facilitate as deserialization gadgets and thus help the attackers in exploiting deserialization vulnerabilities. In this section we present the techniques used to find the vulnerabilities within the popular frameworks showcased during the live demo at the session’s start.
Finally we conclude with tips on implementing different techniques of hardening measures for applications offering deserialisation interfaces (either direct binary deserialization interfaces or indirect XML-based ones) to give the attendees the third key takeaway: protecting applications properly. This includes ways to verify data integrity prior to deserialization and ways to properly inspect the data before it’s handled by the Java deserialization process.
--
This talk was presented by Christian Schneider & Alvaro Muñoz at the OWASP BeNeLux Day 2016.
This document discusses concurrency and threads in Java. It begins by explaining how to create threads using the Thread class or Runnable interface. It then covers thread states, scheduling, and synchronization to prevent race conditions. Key points include how threads can run concurrently but share resources like memory, the use of synchronized methods to allow only one thread access at a time, and monitors that control access to objects.
Haj 4344-java se 9 and the application server-1Kevin Sutter
Our presentation at InterConnect 2017 about Java SE 9 and our direct experiences with using it as our Java runtime for the WebSphere Liberty application server.
This document discusses the evolution of Java, including new features introduced in Java 5, 6, and 7. It provides a review of 10 key features in Java 5 such as generics, autoboxing/unboxing, annotations, and new utility classes. It then describes 9 new features in Java 6, including pluggable annotation processing, common annotations, JAXB, JAX-WS, StAX, digital signatures, and the compiler API. Finally, it briefly mentions new features planned for Java 7.
The document provides an overview of the Java programming language. It discusses that Java was developed in the early 1990s by Sun Microsystems. It then summarizes some of Java's main features, including that it is a simple, object-oriented, robust, distributed, platform independent, secured, architecture-neutral, portable, high-performance, multi-threaded, and dynamic language. It also briefly discusses the Java Virtual Machine, Java Runtime Environment, Java Development Kit, Java bytecode, and the main method.
The Java Naming and Directory Interface (JNDI) allows Java applications to look up and discover named objects in a directory service. JNDI provides a standard interface for naming and accessing resources such as databases. Distributed application components can use JNDI to locate other components and resources by name. The JNDI lookup method passes a name and returns the associated object, enabling access to resources without prior knowledge of implementation details or location.
JDK 1.6 introduced enhancements to collections like Deque and BlockingDeque. It added support for XML, web services, and annotations. New features included support for scripting languages via JSR 223, improved JDBC 4.0 support, and enhancements to AWT and Swing for application GUIs. The Java compiler APIs were also made accessible to programs.
The next release of the Java Standard Edition is scheduled for the beginning of 2010. In this session we'll review the latest feature list of what's in and what's out of the next version of the JDK.
An update on the latest news around JavaFX including the 1.2 release and the general availability of JavaFX Mobile for Windows Mobile devices.
This document provides an overview of basic Java concepts including Java files, class files, bytecode, JAR files, the Java Virtual Machine (JVM), Java Development Kit (JDK), Java Runtime Environment (JRE), heap memory, permgen space, and threads. It defines these terms and explains the relationships between Java files, class files, bytecode, and the JVM/JRE. Screenshots from JVisualVM are included to illustrate the heap, classes, and threads in use by Eclipse.
What is Java Technology (An introduction with comparision of .net coding)Shaharyar khan
A introductory slides for those who want to learn and know some basics of Java.Also for those persons who want to compare coding difference between Java and .net
This document provides an overview of core Java basics. It discusses:
- The origins and evolution of Java from its initial release in 1995 to current versions.
- Key characteristics of Java including being object-oriented, platform independent, simple, robust, and distributed.
- The Java environment setup and basic syntax including classes, objects, and methods.
- A simple "Hello World" example Java program.
- Primitive data types in Java like int, float, boolean and how they differ.
- Object-oriented programming concepts in Java such as abstraction, encapsulation, inheritance and polymorphism.
Carol McDonald discusses the key themes and technologies in Java EE 6, which was released on December 10, 2009. The major themes of Java EE 6 are right-sizing with modular profiles, extensibility through pluggability, and ease of development through features like dependency injection and managed beans. New and updated specifications in Java EE 6 include CDI 1.0, EJB 3.1, JPA 2.0, JSF 2.0, JAX-RS 1.1, and Servlet 3.0.
The document provides an introduction to Java and XML. It outlines the course objectives which are to introduce Java architecture, syntax, object-oriented concepts, exception handling, and packaging Java applications. It also aims to introduce XML and XML parsing. The session plan for day 1 includes a review of object-oriented concepts and an introduction to the Java architecture, basic constructs in Java, classes, objects, and features of object-oriented programming in Java.
The document discusses and compares Dalvik VM and Java VM. It states that Dalvik VM is used in Android and executes optimized .dex files and Dalvik bytecodes, while Java VM executes .class files. It also mentions that Dalvik VM uses register-based architecture while Java VM uses stack-based architecture. The document further discusses advantages of Dalvik VM like minimal memory footprint and how .class files are converted to .dex files. It provides comparisons between key aspects of both VMs.
Rapid application development techniques, favoring rapid prototyping over intensive planning, have become popular in the last few years. Although the "old-school" Java Web frameworks (such as Struts and JSF) are well suited for enterprise projects, their development cycle is often too slow and complicated for prototyping. Due to their nature, dynamic languages such as Ruby, Python, and Groovy are natural for fast prototyping and scaffolding. But is there a way to benefit the Java ecosystem without compromising simplicity and productivity? This presentation tries to answer this question by comparing, head-to-head, three leading Java RAD tools—SeamForge, Play, and Roo—by writing a full-blown Web application in each of them, comparing the pros and cons along the way.
CS266 Software Reverse Engineering (SRE)Reversing and Patching Java Bytecode
Teodoro (Ted) Cipresso, teodoro.cipresso@sjsu.edu
Department of Computer Science
San José State University
Spring 2015
Modularisation in Java 9 splits the Java language and JDK/JRE into modules. This includes modularising the OpenJDK source code and runtime images to improve structure, reduce dependencies, and allow for smaller custom runtimes using jlink. The Java Platform Module System (JSR 376) introduced modules that define dependencies and exported/opened packages, allowing Java code and the JDK to be modularized. Hands-on sessions demonstrated creating modules, using jlink to build custom runtimes, and migrating non-modular code to Java 9.
The document compares the J2EE and .NET platforms, providing a layer-by-layer comparison of their infrastructures. It discusses similarities and differences in areas like runtime systems, object models, statements, exceptions, base classes, multithreading, deployment, component models, and database access. Key similarities include support for interfaces, inheritance, namespaces/packages, and reflection APIs. Differences include .NET's unified treatment of value and reference types and support for attributes, indexers, and operator overloading.
Java 7 and 8, what does it mean for youDmitry Buzdin
Java 7 and 8 introduced several new features and enhancements including Project Coin language changes to simplify coding, invokedynamic support for dynamic languages, try-with-resources for improved resource management, and improved concurrency utilities. Oracle's priorities for Java include supporting a vibrant ecosystem, generating revenue through Java support and management tools from JRockit, and lowering costs by converging JRockit and HotSpot features in future versions.
Java Deserialization Vulnerabilities - The Forgotten Bug ClassCODE WHITE GmbH
This document discusses Java deserialization vulnerabilities. It provides an introduction to how Java serialization works and what the security issues are. Specifically, it describes how an attacker can exploit vulnerabilities to remotely execute code on a server by deserializing malicious objects. The document gives examples of past vulnerabilities found in various Java applications and frameworks. It also provides tips for finding vulnerabilities and generating payloads to demonstrate exploits.
Serial Killer - Silently Pwning your Java Endpoints // OWASP BeNeLux Day 2016Christian Schneider
In this session we begin with modelling the attack surface of Java deserialization, which often leads to remote code execution (RCE), by showcasing vulnerabilities we found in modern and widely used applications and frameworks. We extend existing research about risks of deserialization broadening the attack surface. After a live demo of getting a Meterpreter shell in a modern Java endpoint setup we delve into the exploitation styles for this vulnerability to lay the foundation of the first of three key takeaways for the attendees:
The first key takeaway is identification of test types that should be executed during a dynamic assessment of an application in order to find this kind of vulnerability. This includes analyzing the deserialization interface and using blackbox tests to create payloads with gadgets matching the application’s classpath to verify the RCE. Discussion extends to cover indirect deserialization interfaces that use non-binary data formats, such as XML-based interfaces, which can also act as a driver for deserialization within the application.
The next key takeaway covers the realm of static code analysis (SAST). We present code patterns security reviewers should look for when doing whitebox assessments of applications or frameworks. This is especially interesting for code offering dynamic functionality including AOP, generic mappings, reflection, interceptors, etc. - all of which have a high probability of including code that can facilitate as deserialization gadgets and thus help the attackers in exploiting deserialization vulnerabilities. In this section we present the techniques used to find the vulnerabilities within the popular frameworks showcased during the live demo at the session’s start.
Finally we conclude with tips on implementing different techniques of hardening measures for applications offering deserialisation interfaces (either direct binary deserialization interfaces or indirect XML-based ones) to give the attendees the third key takeaway: protecting applications properly. This includes ways to verify data integrity prior to deserialization and ways to properly inspect the data before it’s handled by the Java deserialization process.
--
This talk was presented by Christian Schneider & Alvaro Muñoz at the OWASP BeNeLux Day 2016.
This document discusses concurrency and threads in Java. It begins by explaining how to create threads using the Thread class or Runnable interface. It then covers thread states, scheduling, and synchronization to prevent race conditions. Key points include how threads can run concurrently but share resources like memory, the use of synchronized methods to allow only one thread access at a time, and monitors that control access to objects.
Haj 4344-java se 9 and the application server-1Kevin Sutter
Our presentation at InterConnect 2017 about Java SE 9 and our direct experiences with using it as our Java runtime for the WebSphere Liberty application server.
This document discusses the evolution of Java, including new features introduced in Java 5, 6, and 7. It provides a review of 10 key features in Java 5 such as generics, autoboxing/unboxing, annotations, and new utility classes. It then describes 9 new features in Java 6, including pluggable annotation processing, common annotations, JAXB, JAX-WS, StAX, digital signatures, and the compiler API. Finally, it briefly mentions new features planned for Java 7.
The document provides an overview of the Java programming language. It discusses that Java was developed in the early 1990s by Sun Microsystems. It then summarizes some of Java's main features, including that it is a simple, object-oriented, robust, distributed, platform independent, secured, architecture-neutral, portable, high-performance, multi-threaded, and dynamic language. It also briefly discusses the Java Virtual Machine, Java Runtime Environment, Java Development Kit, Java bytecode, and the main method.
- The event featured live music and talks about new Java technologies like JavaFX, Java EE 6, and the JDK 7. James Gosling discussed the growth of the Java ecosystem to over 10 billion devices and 6.5 million developers.
- New features in Java EE 6 include improved modularity, dependency injection, and support for open web frameworks. The JavaFX platform allows creation of rich client applications across devices.
- Performance tuning techniques for Java applications include selecting an appropriate garbage collection algorithm and tuning JVM settings based on application requirements.
- The document summarizes key announcements and projects from JavaOne 2010, including Project Coin, Project Lambda, and Project Jigsaw which focus on language enhancements for productivity, closures, and modularity.
- It also discusses case studies from various companies on architectures using technologies like Spring, Hibernate, caching, and NoSQL databases to handle large-scale applications.
- Trends highlighted include focus on asynchronous and event-driven architectures, partitioning, and monitoring to handle thousands of servers and billions of requests per day.
Java 2 Platform Standard Edition (J2SE) 5.0 introduces several new features to improve type safety and eliminate boilerplate code including generics, enhanced for loops, autoboxing/unboxing, and annotations. It contains nearly 100 updates developed through the Java Community Process and allows tools to generate code from annotations in source code through an annotation processing tool called apt.
The document compares the Java and .NET platforms, covering their profiles, runtime systems, object models, common base classes, multithreading, deployment, database access, web development, and provides an example login implementation in each. Key differences noted are that Java focuses on interpretation while .NET supports multiple languages, and .NET provides better versioning support with side-by-side execution of assemblies. Both platforms aim to decouple data models from user code but use different approaches like JDBC vs ADO.NET.
Core java and advance java syallabus - Cacit.co.incacitnoida
This document outlines a 14 session training course on Java programming. Session topics include an introduction to Java, setting up the development environment, Java language elements, operators and control flow, arrays, object-oriented programming concepts, inheritance, polymorphism, exception handling, multithreading, wrapper classes, string manipulation, collections framework, input/output streams, databases and JDBC, servlets, Java server pages, Java beans, Struts, Spring, Hibernate, and a live project. Each session includes hands-on labs to reinforce concepts. The training is provided by CAC-IT, an ISO-certified training center located in Noida, India.
This document provides an overview of several Java fundamentals topics including:
- Java 7 features like improved exception handling, strings as switch selectors, and try-with-resources blocks
- NIO.2 for easy file handling and asynchronous I/O using futures and callbacks
- Dependency injection and modern concurrency concepts like safety, liveness, and performance
- Building blocks for concurrency like atomic classes, locks, and thread pools
Panama is a Java project that provides a foreign function interface for calling native code more safely than with JNI. The document discusses using Panama to call the OpenSSL library from Java code to provide TLS functionality for the Apache Tomcat web server. It describes generating wrapper code with the Jextract tool, designing the code to match OpenSSL's lifecycle model, and addressing challenges like API changes. Initial performance tests showed it was around 10% slower than JNI, but custom Java 19 builds reduced this to 5%. The roadmap aims for a stable integrated version supporting OpenSSL and working out of the box on Java 22.
Introduction Java Web Framework and Web Server.suranisaunak
The document discusses Java 2 Enterprise Edition (J2EE) and frameworks. It defines J2EE as a set of standard specifications for building large distributed applications using components like Java servlets, JavaServer Pages, and Enterprise JavaBeans. Frameworks provide reusable code and APIs that help develop applications faster by handling common tasks. The document lists several Java persistence and web service frameworks and describes features that distinguish frameworks from normal libraries like inversion of control.
Programming in HTML5 With Java Script and CSS3Testbells
Testbells IDE is a development environment that supports Java, Java EE, JavaFX, HTML5, PHP, and C/C++. The document summarizes the new features of Testbells IDE versions 7.0 through 7.4, including enhanced support for Java 7 and 8, Java EE 7, JavaFX, HTML5, JavaScript, CSS, PHP, and C/C++. Key features include code editing, debugging, testing, version control, and integration with tools like Maven, Jenkins and browsers.
The document provides an introduction to Java programming concepts including an overview of the Java platform, setting up a development environment, writing a first Java application, Java language elements, object-oriented programming concepts, and more. Key topics covered include the history and principles of Java, how to set up Eclipse, writing and running a "Hello World" program, Java syntax like variables and control structures, object-oriented concepts like classes and inheritance, and Java APIs and tools.
A Hitchhiker's Guide to Cloud Native Java EEQAware GmbH
This document provides an overview of developing cloud native Java applications. It discusses:
- Using microservices and containers to build distributed and scalable applications.
- Key principles of cloud native design like designing for distribution, resilience, and automation.
- Tools for building microservices like Java EE, Dropwizard Metrics, Hystrix, and MicroProfile.
- Techniques for configuration, communication, diagnostics, and resiliency when developing microservices.
- Examples of using technologies like Docker, Kubernetes, Payara Server, ActiveMQ, and PostgreSQL in a microservices architecture.
The document provides a comprehensive but concise introduction to developing cloud native applications using microservices and Java technologies.
This document provides an overview of developing cloud native Java applications. It discusses:
- Using microservices and containers to build distributed and scalable applications.
- Key principles of cloud native design like designing for distribution, resilience, and automation.
- Tools for building microservices like Java EE, Dropwizard Metrics, Hystrix, and MicroProfile.
- Techniques for configuration, communication, diagnostics, and resiliency when developing microservices.
- Examples of using technologies like Docker, Kubernetes, Payara Server, ActiveMQ, and PostgreSQL in a microservices architecture.
The document provides a comprehensive but concise introduction to developing cloud native applications using microservices and Java technologies.
Framework design involves balancing many considerations, such as:
- Managing dependencies between components to allow for flexibility and evolution over time. Techniques like dependency injection and layering help achieve this.
- Designing APIs by first writing code samples for key scenarios and defining object models to support these samples to ensure usability.
- Treating simplicity as a feature by removing unnecessary requirements and reusing existing concepts where possible.
In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
We will explore the capabilities of AI in understanding XML markup languages and autonomously creating structured XML content. Additionally, we will examine the capacity of AI to enrich plain text with appropriate XML markup. Practical examples and methodological guidelines will be provided to elucidate how AI can be effectively prompted to interpret and generate accurate XML markup.
Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
By highlighting the potential advantages and challenges of integrating AI with XML development tools and languages, the presentation seeks to inspire thoughtful conversation around the future of XML development. We’ll not only delve into the technical aspects of AI-powered XML development but also discuss practical implications and possible future directions.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
Maruthi Prithivirajan, Head of ASEAN & IN Solution Architecture, Neo4j
Get an inside look at the latest Neo4j innovations that enable relationship-driven intelligence at scale. Learn more about the newest cloud integrations and product enhancements that make Neo4j an essential choice for developers building apps with interconnected data and generative AI.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Pushing the limits of ePRTC: 100ns holdover for 100 daysAdtran
At WSTS 2024, Alon Stern explored the topic of parametric holdover and explained how recent research findings can be implemented in real-world PNT networks to achieve 100 nanoseconds of accuracy for up to 100 days.
UiPath Test Automation using UiPath Test Suite series, part 6DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
Throughout the session, participants will discover how this synergy empowers testers to automate repetitive tasks, enhance testing accuracy, and expedite the software testing life cycle. Topics covered include the seamless integration process, practical use cases, and the benefits of harnessing AI-driven automation for UiPath testing initiatives. By attending this webinar, testers, and automation professionals can gain valuable insights into harnessing the power of AI to optimize their test automation workflows within the UiPath ecosystem, ultimately driving efficiency and quality in software development processes.
What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
“An Outlook of the Ongoing and Future Relationship between Blockchain Technologies and Process-aware Information Systems.” Invited talk at the joint workshop on Blockchain for Information Systems (BC4IS) and Blockchain for Trusted Data Sharing (B4TDS), co-located with with the 36th International Conference on Advanced Information Systems Engineering (CAiSE), 3 June 2024, Limassol, Cyprus.
Cosa hanno in comune un mattoncino Lego e la backdoor XZ?Speck&Tech
ABSTRACT: A prima vista, un mattoncino Lego e la backdoor XZ potrebbero avere in comune il fatto di essere entrambi blocchi di costruzione, o dipendenze di progetti creativi e software. La realtà è che un mattoncino Lego e il caso della backdoor XZ hanno molto di più di tutto ciò in comune.
Partecipate alla presentazione per immergervi in una storia di interoperabilità, standard e formati aperti, per poi discutere del ruolo importante che i contributori hanno in una comunità open source sostenibile.
BIO: Sostenitrice del software libero e dei formati standard e aperti. È stata un membro attivo dei progetti Fedora e openSUSE e ha co-fondato l'Associazione LibreItalia dove è stata coinvolta in diversi eventi, migrazioni e formazione relativi a LibreOffice. In precedenza ha lavorato a migrazioni e corsi di formazione su LibreOffice per diverse amministrazioni pubbliche e privati. Da gennaio 2020 lavora in SUSE come Software Release Engineer per Uyuni e SUSE Manager e quando non segue la sua passione per i computer e per Geeko coltiva la sua curiosità per l'astronomia (da cui deriva il suo nickname deneb_alpha).
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/building-and-scaling-ai-applications-with-the-nx-ai-manager-a-presentation-from-network-optix/
Robin van Emden, Senior Director of Data Science at Network Optix, presents the “Building and Scaling AI Applications with the Nx AI Manager,” tutorial at the May 2024 Embedded Vision Summit.
In this presentation, van Emden covers the basics of scaling edge AI solutions using the Nx tool kit. He emphasizes the process of developing AI models and deploying them globally. He also showcases the conversion of AI models and the creation of effective edge AI pipelines, with a focus on pre-processing, model conversion, selecting the appropriate inference engine for the target hardware and post-processing.
van Emden shows how Nx can simplify the developer’s life and facilitate a rapid transition from concept to production-ready applications.He provides valuable insights into developing scalable and efficient edge AI solutions, with a strong focus on practical implementation.
2. JDK 7 Release – Session
agenda
Project Coin
NIO.2
Concurrency and collections updates
Performance JDK 7 release
More features from JDK 7 release
A glimpse of Java SE 8
Q&A
1
3. Project Coin
The Six Coin Features and How They Help
Easier to use generics
Diamond
Varargs warnings
More concise error handling
Multi-catch
try-with-resources (aka ARM or TWR)
Consistency and clarity
Strings in switch
Literal improvements
Binary literals
Underscores in literals
2
4. Diamond syntax
Type Inference for Generic Instance Creation
3
5. Multi Catch and Final Re-throw
Handling More Than One Type of Exception in a single catch block
Note: If a catch block handles more than one exception type, then the catch
parameter is implicitly final. In this example, the catch parameter ex is final and
therefore you cannot assign any value to it within the catch block.
4
6. Multi Catch and Final Re-throw
Contd.
Rethrowing Exceptions with More Inclusive Type Checking
5
7. try-with-resources
Prior JDK 7
code in finally block, to ensure that a resource is closed regardless of whether
the try statement completes normally or abruptly. The code is a bit messy!
6
8. try-with-resources Cont.
JDK 7 introduces a try-with-resources statement, which ensures that each of the
resources in try(resourses) is closed at the end of the statement. This results in cleaner
code.
Note: A try-with-resources statement can have catch and finally blocks just like an
ordinary try statement. In a try-with-resources statement, any catch or finally block is run
after the resources declared have been closed.
Suppressed Exceptions
Throwable.getSuppressed
Classes That Implement the AutoCloseable or Closeable Interface
7
9. Strings in switch
Nothing much to explain here, the title says it all.
Previous versions of Java, the argument of switch had to be only of the following
primitive data types: byte, short, char, int, or enum
Starting from JDK 7, you can use arguments of type String in the expression of a
switch statement.
How about LONG in switch?
8
10. Binary Literals
Integral types (byte, short, int, and long) can also be expressed using the binary
number system
Add the prefix 0b or 0B to the number
9
11. Underscores in Numeric Literals
How much is 10000000000?
And now 10_000_000_000?
You can place underscores only between digits; you cannot place underscores in
the following places:
At the beginning or end of a number
Adjacent to a decimal point in a floating point literal
Prior to an F or L suffix
In positions where a string of digits is expected
10
12. Simplified vararg methods invocation
Heap Pollution
Non-reifiable types
parameterized types, such as ArrayList<Number> and List<String>
Occurs when a variable of a parameterized type refers to an object that is not of
that parameterized type
During type erasure, the types ArrayList<Number> and List<String> become
ArrayList and List, respectively.
In JDK 1.7
@SafeVarargs has been introduced to suppress such exception.
11
14. Project Coin – Design complexity vs
Implementation Effort
13
15. Project Coin support in IDEs
Pick an IDE, any IDE
IntelliJ IDEA 10.5 and later
http://blogs.jetbrains.com/idea/2011/02/announcin
g-intellij-idea-105-with-full-java-7-support/
Eclipse 3.7.1 and later
http://www.eclipse.org/jdt/ui/r3_8/Java7news/what
s-new-java-7.html
NetBeans 7.0 and later
http://netbeans.org/kb/docs/java/javase-jdk7.html
14
16. NIO.2
Navigation Helpers
Two key navigation Helper Types:
Class java.nio.file.Paths
Exclusively static methods to return a Path by converting a string or Uniform Resource Identifier
(URI)
Interface java.nio.file.Path
Used for objects that represent the location of a file in a file system, typically system dependent.
Typical use case:
Use Paths to get a Path. Use Files to do stuff.
15
17. NIO.2 Features –Files Helper
Class
Class java.nio.file.Files
Exclusively static methods to operate on files, directories
and other types of files
Files helper class is feature rich:
Copy
Create Directories
Create Files
Create Links
Use of system “temp” directory
Delete
Attributes –Modified/Owner/Permissions/Size, etc.
Read/Write
Files.move(src, dst);
Files.copy(src,
dst,StandardCopyOption.COPY_ATTRIBUTES,
StandardCopyOption.REPLACE_EXISTING);
16
18. NIO.2 Directories
Directory support in NIO.2 using DirectoryStream
Uses less resources
Smooth out response time for remote file systems
Implements Iterable and Closeable for productivity
17
19. NIO.2 Symbolic Links
Path and Files are “link aware”.
One could create symbolic link or hard link from one
path to another.
18
20. NIO.2 Walking A File Tree
A FileVisitor interface makes walking a file tree for search, or performing actions.
SimpleFileVisitor implements
preVisitDirectory(T dir,
BasicFileAttributes attrs);
visitFile(T dir,
BasicFileAttributes attrs);
visitFileFailed(T dir,
IOException exc);
postVisitDirectory(T dir,
IOException exc);
19
21. NIO.2 Watching A Directory
Create a WatchService “watcher” for the filesystem
Register a directory with the watcher
“Watcher” can be polled or waited
on for eventsEvents raised in the
form of Keys
Retrieve the Key from the Watcher
Key has filename and events
within it for create/delete/modify
Ability to detect event overflows
20
22. NIO.2 many more…
Custom FileSystems
Provider registration method may depend on JSR-277
Provider is a factory for FileSystem, FileRef and
FileChannel objects
Need not be tied to a “real” filesystem
Zip file, CD-ROM image, ram disk, flash rom, etc
Multiple/alternate views of same underlying files
Hide sensitive files, read-only views, path munging, etc
Filesystem provider for zip/jar archives
Asynchronous I/O
Buffers, Sockets and File I/O
Mostly small additions for completeness
Multicast is the big new feature
21
23. Concurrency and Collections updates
platform-independent parallel speed-ups of computation-intensive operations
not a full substitute for the kinds of arbitrary processing supported by Executors or
Threads
provide significantly greater performance on multiprocessor platforms
22
26. Performance - JDK 7
The JDK 7 delivers quite a speed boost over JDK 6 array accesses
25
27. More features of Java SE 7
Support for dynamically-typed languages (InvokeDynamic)
Concurrency and collections updates
SCTP (Stream Control Transmission Protocol)
SDP (Sockets Direct Protocol)
JDBC 4.1
Enhanced Mbeans
Update the XML stack
client
XRender pipeline for Java 2D
Create new platform APIs for 6u10 graphics features
Nimbus look-and-feel for Swing
Swing JLayer component
Gervill sound synthesizer
and few more…
JavaDoc Improvements
CSS for JavaDoc -stylesheet.css
26
28. Java SE 8
Due to land Spring / Summer 2013
Main Features
Lambdas (aka Closures)
New Date and Time APIs
Jigsaw (modularisation)
Also:
Type Annotations
Coin Part 2
Ongoing work to merge VMs
Getting rid of PermGen
27
29. Java SE 8 Cont.
Creating collections like Arrays and Index based access
Advanced Example
Creating immutable collection
28
30. References for resources
JDK 7 features:
http://openjdk.java.net/projects/jdk7/features/
http://www.oracle.com/technetwork/java/javase/jdk7-relnotes-
418459.html
Project coin:
http://docs.oracle.com/javase/7/docs/technotes/guides/language/
enhancements.html#javase7
Support for Dynamically Typed Languages in the Java
Virtual Machine
http://java.sun.com/developer/technicalArticles/DynTypeLang/
NIO.2
http://docs.oracle.com/javase/7/docs/technotes/guides/io/enhanc
ements.html#7
29
“Project Coin is a suite oflanguage and library changesto make things programmers doeveryday easier.”“Small” languagechangesLanguage Level, not VMRemove extra text to make programs more readable• Encourage writing programs that are more reliable• Integrate well with past and future changesProject Coin in Action:Using New Java SE 7 Language Features in Real Code,Easy for the programmer, more work for the compiler!
http://docs.oracle.com/javase/7/docs/technotes/guides/language/type-inference-generic-instance-creation.htmlYou can replace the type arguments required to invoke the constructor of a generic class with an empty set of type parameters (<>) as long as the compiler can infer the type arguments from the context. This pair of angle brackets is informally called the diamond.In Java SE 7, you can substitute the parameterized type of the constructor with an empty set of type parameters (<>): Note that to take advantage of automatic type inference during generic class instantiation, you must specify the diamond. In the following example, the compiler generates an unchecked conversion warning because the HashMap() constructor refers to the HashMap raw type, not the Map<String, List<String>> type:
In Java SE 7 and later, a single catch block can handle more than one type of exception. This feature can reduce code duplication and lessen the temptation to catch an overly broad exception.The catch clause specifies the types of exceptions that the block can handle, and each exception type is separated with a vertical bar (|).Note: If a catch block handles more than one exception type, then the catch parameter is implicitly final. In this example, the catch parameter ex is final and therefore you cannot assign any values to it within the catch block.Bytecode generated by compiling a catch block that handles multiple exception types will be smaller (and thus superior) than compiling many catch blocks that handle only one exception type each. A catch block that handles multiple exception types creates no duplication in the bytecode generated by the compiler; the bytecode has no replication of exception handlers.
This examples's try block could throw either FirstException or SecondException. Suppose you want to specify these exception types in the throws clause of the rethrowException method declaration. In releases prior to Java SE 7, you cannot do so. Because the exception parameter of the catch clause, e, is type Exception, and the catch block rethrows the exception parameter e, you can only specify the exception type Exception in the throws clause of the rethrowException method declaration.However, in Java SE 7, you can specify the exception types FirstException and SecondException in the throws clause in the rethrowException method declaration. The Java SE 7 compiler can determine that the exception thrown by the statement throw e must have come from the try block, and the only exceptions thrown by the try block can be FirstException and SecondException. Even though the exception parameter of the catch clause, e, is type Exception, the compiler can determine that it is an instance of either FirstException or SecondException:
http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.htmlThe try-with-resources statement is a try statement that declares one or more resources. A resource is an object that must be closed after the program is finished with it. The try-with-resources statement ensures that each resource is closed at the end of the statement. Any object that implements java.lang.AutoCloseable, which includes all objects which implement java.io.Closeable, can be used as a resource.In this example, the resource declared in the try-with-resources statement is a BufferedReader. The declaration statement appears within parentheses immediately after the try keyword. The class BufferedReader, in Java SE 7 and later, implements the interface java.lang.AutoCloseable. Because the BufferedReader instance is declared in a try-with-resource statement, it will be closed regardless of whether the try statement completes normally or abruptly (as a result of the method BufferedReader.readLine throwing an IOException).However, in this example, if the methods readLine and close both throw exceptions, then the method readFirstLineFromFileWithFinallyBlock throws the exception thrown from the finally block; the exception thrown from the try block is suppressed. In contrast, in the example readFirstLineFromFile, if exceptions are thrown from both the try block and the try-with-resources statement, then the method readFirstLineFromFile throws the exception thrown from the try block; the exception thrown from the try-with-resources block is suppressed. In Java SE 7 and later, you can retrieve suppressed exceptions; see the section Suppressed Exceptions for more information.Throwable.getSuppressedSee the Javadoc of the AutoCloseable and Closeable interfaces for a list of classes that implement either of these interfaces. The Closeable interface extends the AutoCloseable interface. The close method of the Closeable interface throws exceptions of type IOException while the close method of the AutoCloseable interface throws exceptions of type Exception. Consequently, subclasses of the AutoCloseable interface can override this behavior of the close method to throw specialized exceptions, such as IOException, or no exception at all.--------------------------"One shortcoming of the construct is that it does not provide a way for the programmer to indicate that exceptions thrown when closing a resource should be ignored"
The Java switch statement is compiled into the JVM bytecodetableswitch or lookupswitch. Both of these bytecodes require that the case values be unique, 32-bit, integer, compile-time constants.The tableswitch and lookupswitch instructions both include one default branch offset and a variable-length set of case value/branch offset pairs.Both instructions pop the key (the value of the expression in the parentheses immediately following the switch keyword) from the stack.The key is compared with all the case values:If a match is found, the branch offset associated with the case value is taken. If no match is found, the default branch offset is taken. If you attempt to use a long, float, or double as a switch key, your program won't compile.http://www.artima.com/underthehood/flowP.html
Binary literals can make relationships among data more apparent than they would be in hexadecimal or octal. For example, each successive number in the following array is rotated by one bit:public static final int[] phases = { 0b00110001, 0b01100010, 0b11000100, 0b10001001, 0b00010011, 0b00100110, 0b01001100, 0b10011000}In hexadecimal, the relationship among the numbers is not readily apparent:public static final int[] phases = { 0x31, 0x62, 0xC4, 0x89, 0x13, 0x26, 0x4C, 0x98}
The following examples demonstrate valid and invalid underscore placements (which are highlighted) in numeric literals:float pi1 = 3_.1415F; // Invalid; cannot put underscores adjacent to a decimal pointfloat pi2 = 3._1415F; // Invalid; cannot put underscores adjacent to a decimal pointlong socialSecurityNumber1 = 999_99_9999_L; // Invalid; cannot put underscores prior to an L suffixint x1 = _52; // This is an identifier, not a numeric literalint x2 = 5_2; // OK (decimal literal)int x3 = 52_; // Invalid; cannot put underscores at the end of a literalint x4 = 5_______2; // OK (decimal literal)int x5 = 0_x52; // Invalid; cannot put underscores in the 0x radix prefixint x6 = 0x_52; // Invalid; cannot put underscores at the beginning of a numberint x7 = 0x5_2; // OK (hexadecimal literal)int x8 = 0x52_; // Invalid; cannot put underscores at the end of a numberint x9 = 0_52; // OK (octal literal)int x10 = 05_2; // OK (octal literal)int x11 = 052_; // Invalid; cannot put underscores at the end of a number
http://docs.oracle.com/javase/7/docs/technotes/guides/language/non-reifiable-varargs.htmlhttp://codeidol.com/java/javagenerics/Reification/Reifiable-Types/Note: In Java SE 5 and 6, it is the responsibility of the programmer who calls a varargs method that has a non-reifiablevarargs formal parameter to determine whether heap pollution would occur. However, if this programmer did not write such a method, he or she cannot easily determine this. In Java SE 7, it is the responsibility of the programmer who writes these kinds of varargs methods to ensure that they properly handle the varargs formal parameter and ensure heap pollution does not occur.In Java, we say that a type is reifiable if the type is completely represented at run time that is, if erasure does not remove any useful information. To be precise, a type is reifiable if it is one of the following:A primitive type (such as int)A nonparameterized class or interface type(such as Number, String, or Runnable)A parameterized type in which all type arguments are unbounded wildcards(such as List<?>, ArrayList<?>, or Map<?, ?>)A raw type (such as List, ArrayList, or Map)An array whose component type is reifiable(such as int[], Number[], List<?>[], List[], or int[][])A type is not reifiable if it is one of the following:A type variable (such as T)A parameterized type with actual parameters(such as List<Number>, ArrayList<String>, or Map<String, Integer>)A parameterized type with a bound(such as List<? extends Number> or Comparable<? super String>)So the type List<? extends Object> is not reifiable, even though it is equivalent to List<?>. Defining reifiable types in this way makes them easy to identify syntactically.
Preview versions of classes targeted for Java 7. Includes a fine-grained parallel computation framework: ForkJoinTasks and their related support classes provide a very efficient basis for obtaining platform-independent parallel speed-ups of computation-intensive operations. They are not a full substitute for the kinds of arbitrary processing supported by Executors or Threads. However, when applicable, they typically provide significantly greater performance on multiprocessor platforms. Candidates for fork/join processing mainly include those that can be expressed using parallel divide-and-conquer techniques: To solve a problem, break it in two (or more) parts, and then solve those parts in parallel, continuing on in this way until the problem is too small to be broken up, so is solved directly. The underlying work-stealing framework makes subtasks available to other threads (normally one per CPU), that help complete the tasks. In general, the most efficient ForkJoinTasks are those that directly implement this algorithmic design pattern.
The bounds checks slows the performance when compared to native languages. In JDK7, there is a JVM performance improvement on array accesses.
Lambdas – support for lambda mathematical function, lambda expressionsa little snippet of code (function) that can be passed as argument of some method for subsequent execution