Vibrant Technologies is headquarted in Mumbai,India.We are the best Java training provider in Navi Mumbai who provides Live Projects to students.We provide Corporate Training also.We are Best Java classes in Mumbai according to our students and corporators
Get ready for FRC 2015: Intro to Java 5 through 8 updates and EclipseJeanne Boyarsky
FRC (FIRST Robotics Challenge) is switching from Java ME 1.4 to Java SE 8 along with switching from NetBeans to Eclipse for the 2014-2015 school year. I gave this presentation to representatives from teams 2601 (Townsend Harris) and 694 (Stuyvesant) today.
Team 2601 recorded my presentation which is available on youtube (https://www.youtube.com/watch?v=AgreKkRjFgU&feature=youtu.be) and at the end of my presentation on slideshare.
Vibrant Technologies is headquarted in Mumbai,India.We are the best Java training provider in Navi Mumbai who provides Live Projects to students.We provide Corporate Training also.We are Best Java classes in Mumbai according to our students and corporators
Get ready for FRC 2015: Intro to Java 5 through 8 updates and EclipseJeanne Boyarsky
FRC (FIRST Robotics Challenge) is switching from Java ME 1.4 to Java SE 8 along with switching from NetBeans to Eclipse for the 2014-2015 school year. I gave this presentation to representatives from teams 2601 (Townsend Harris) and 694 (Stuyvesant) today.
Team 2601 recorded my presentation which is available on youtube (https://www.youtube.com/watch?v=AgreKkRjFgU&feature=youtu.be) and at the end of my presentation on slideshare.
Java history, versions, types of errors and exception, quiz SAurabh PRajapati
this ppt contains history and basic facts of object oriented programming language java, difference between JIT, JVM, JRE and JDK. it also having information about different versions of java. advantages over other language, difference between error and exception with its types is also included. explanation of final variable and string to int conversation is also added. in the end some twisted question of it which sharpen the knowledge of its basic are added. beyond this some programming examples with output is there too. hope u find it useful...!! thanku..!!
JVM, JRE and Javac are the main part for the java programsiyaram ray
Infocampus provides java course in bangalore with lesser fees .Attend 4 days free demo classes for the java training. Core and Advance java classes are availble in best java training institute on the weekdays and weekends.
Learn OOPs concept,Thread ,Packages , Spring ,Applet,Servlet and hibernate in java/j2ee classes. Pay fees in installaments. Syllabus is according to getting a job easily.
To get the free demo classes call at : 9738001024 or for more information on Advance Java training enquire at : http://www.infocampus.co.in/java-training-bangalore.html
Introduction to Java Programming, Basic Structure, variables Data type, input...Mr. Akaash
This is First Lecture of java Programming which cover all basic points (ie. History and feature of java, Introduction to java, about variables data type and compilation....
Introduction to Java : Feature to Java, Java Virtual Machine, Differences between C++ and Java,
Part of Java, API Document, Starting a Java Program. Important Classes, Formatting the Output
This extensive course covers all the topics which will definitely make you a Java Superstar. You can do almost anything in Java after this course. You will surely be a better programmer and better still a Elegant programmer after this course.
Java history, versions, types of errors and exception, quiz SAurabh PRajapati
this ppt contains history and basic facts of object oriented programming language java, difference between JIT, JVM, JRE and JDK. it also having information about different versions of java. advantages over other language, difference between error and exception with its types is also included. explanation of final variable and string to int conversation is also added. in the end some twisted question of it which sharpen the knowledge of its basic are added. beyond this some programming examples with output is there too. hope u find it useful...!! thanku..!!
JVM, JRE and Javac are the main part for the java programsiyaram ray
Infocampus provides java course in bangalore with lesser fees .Attend 4 days free demo classes for the java training. Core and Advance java classes are availble in best java training institute on the weekdays and weekends.
Learn OOPs concept,Thread ,Packages , Spring ,Applet,Servlet and hibernate in java/j2ee classes. Pay fees in installaments. Syllabus is according to getting a job easily.
To get the free demo classes call at : 9738001024 or for more information on Advance Java training enquire at : http://www.infocampus.co.in/java-training-bangalore.html
Introduction to Java Programming, Basic Structure, variables Data type, input...Mr. Akaash
This is First Lecture of java Programming which cover all basic points (ie. History and feature of java, Introduction to java, about variables data type and compilation....
Introduction to Java : Feature to Java, Java Virtual Machine, Differences between C++ and Java,
Part of Java, API Document, Starting a Java Program. Important Classes, Formatting the Output
This extensive course covers all the topics which will definitely make you a Java Superstar. You can do almost anything in Java after this course. You will surely be a better programmer and better still a Elegant programmer after this course.
Electric Heating Solutions - Nexthermal Smart Heat ManagementDeven Singh
Nexthermal is a leading innovator and manufacturer of electric heaters like coil heaters, cartridge heaters, electric ceramic heater, Modular Circulation Heaters, Wood Pallet Stove Igniter, PCR Well Heating System, Hotlock and Axial Heaters.
Supertech Apex Tower is a high rise residential project located at Noida Expressway. The project consists of 2BHK and 3BHK apartments. Situated at sector 93A Noida, the project has good connectivity to Noida cit center.
Google es mucho más que un buscador, conoce y exprime todas las posibilidades que te ofrece Internet y las herramientas del Maletín para el Emprendedor!
The presentation slides used during WSO2Con 2011 tutorial session. The tutorial included hands on sessions as well. The slides named as 'demo' refers to hadns-on sessions/demos.
Welcome to the wonderful world of composer,
We will see what is composer, how we can use it.
Namespacing (What, How & Why)
& Autoloading your own code using composer
Java is a fun language. Let’s look at some of the reasons:
Built-in support for multi-threading, socket communication, and memory management (automatic garbage collection).
Object Oriented (OO).
Better portability than other languages across operating systems.
Supports Web-based applications (Applet, Servlet, and JSP), distributed applications (sockets, RMI. EJB etc) and network protocols (HTTP, JRMP etc) with the help of extensive standardized APIs (Application Program Interfaces). Java does not support pointers. Pointers are inherently tricky to use and troublesome.
Java does not support multiple inheritances because it causes more problems than it solves. Instead Java supports multiple interface inheritance, which allows an object to inherit many method signatures from different interfaces with the condition that the inheriting object must implement those inherited methods. The multiple interface inheritance also allows an object to behave polymorphically on those methods. [Refer Q 8 and Q 10 in Java section.]
Java does not support destructors but rather adds a finalize() method. Finalize methods are invoked by the garbage collector prior to reclaiming the memory occupied by the object, which has the finalize() method. This means you do not know when the objects are going to be finalized. Avoid using finalize() method to release non-memory resources like file handles, sockets, database connections etc because Java has only a finite number of these resources and you do not know when the garbage collection is going to kick in to release these resources through the finalize() method.
A class loader is an object that is responsible for loading classes. The class ClassLoader is an abstract class. Given the name of a class, a class loader should attempt to locate or generate data that constitutes a definition for the class. A typical strategy is to transform the name into a file name and then read a "class file" of that name from a file system.ThesisScientist.com
The Java platform is an unqualified success story. It’s used to develop applications
for everything from small mobile devices to massive enterprise endeavours.
But this success has come in spite of the fact that Java doesn’t have explicit support for building
modular systems beyond ordinary object-oriented data encapsulation
What does this mean to you? If Java is a success despite its lack of advanced modularization support, then you may wonder if that absence is a problem
20 most important java programming interview questionsGradeup
These questions are prepared by Java Programming Experts and solutions to these programs are asked during job interviews. Knowing solution to these questions helps you in getting a job.
MS CS - Selecting Machine Learning AlgorithmKaniska Mandal
ML Algorithms usually solve an optimization problem such that we need to find parameters for a given model that minimizes
— Loss function (prediction error)
— Model simplicity (regularization)
1. Eclipse as we know is a great implementation of plugin-architecture.
We decouple different components of a system into bundles.
plugin-architecture is very simplistic in nature, highly extensible and modular at the
cost of a tricky class-loading policy.
Actually Eclipse is a story of several class-loaders.
It iniataites a chain of class loaders to load the plug-ins lazily as specified in
component-specific manifest.mf files.
If we understand its class-loading policy and learn some tricks, then we can make
different third-party jars talk to each other and avoid infamous 'ClassNotFound
Exception'.
The immediate parent of a plug-in class loader is the Eclipse Boot Class Loader
(providing access to boot.jar). The parent is the standard java system class loader
which terminates the chain. The Application Class-loader which loads classes from
the system's CLASSPATH is not part of the chain.
That's why while loading product components, Eclipse does not look into Classpath
in contrast to any other java-based client applications.
On start-up, the eclipse platform builds a shadow of all the plugins by reading all the
manifest files into a plug-in registry.
Whenever a plugin com.xyz.myProduct is started by Eclipse Application Class,
the class-loader for com.xyz.myProduct takes-off.
If com.myProduct.xyz tries to access any class from another plugin
com.myProduct.abc,
Eclipse invokes the Plug-in Class-loader coresponding to com.myProduct.abc.
That's the essence of Eclipse OSGi.
Q1. How to use third-party applications while building and running my
product ?
Its of no use to specify third-party jars in classpath.
While building the application com.myProduct, we should bundle all the required jars
in a single plugin (com.myProduct.library) and expose the apis of the bundled log4j,
jpox, xstream etc.
Q2. How a third-party jar (log4j.jar) can see the classes from
com.myProduct.xyz.jar during runtime ?
Lets assume com.abc.myProduct plugin logs messages using log4j.
So during runtime, log4j needs to see the classes from com.myProduct.abc plugin
This can be achieved by registering log4j with Eclipse-Buddy Policy and specifying
com.abc.myProduct as a buddy of log4j.
# log4j Manifest.MF
Bundle-Name: org.apache.log4j
Bundle-Version: 1.2.13
2. ...
Eclipse-BuddyPolicy: registered
# myplugin Manifest.MF
Bundle-Name: com.abc.myProduct
Bundle-Version: 1.0.0
Requires-Bundle: org.apache.log4j,...
Eclipse-RegisterBuddy: org.apache.log4j
If anyone registers with log4j as its buddy, and log4j needs to find a class
com.abc.myProduct.MyComponent then it will check all the buddies before throwing
"ClassNotFound" Exception
Q3. How can users integrate third-party jars with myProduct plugins on-the-
fly ?
Lets see how users can actually hack eclipse configuration files to integrate required
jars on-the-fly.
say user has installed a plugin com.magicScript which allows him to program using
any script including jruby. But the product plugin doesn't ship the jruby jars i.e. does
not adopt any of the above mechanisms.
So user have to add JRUBY_MOME in eclipse.ini. Now when eclipse will start up it
will set jruby home in the path.
Lets assume the com.magicScript plugin already depends on a plugin
com.magicScript.library containing a lib folder.
Next the jruby.jar needs to be placed inside the lib folder and the location libjruby.jar
needs to be specified in the manifest.mf of com.magicScript.library.
Finally, starting eclipse with -clean -Intialization option will automatically first set
Jruby path and then invoking magicScript perspective will trigger the classLoader for
the bundle com.magicScript.library which in turn will load jruby classes from the jar
(as specified in manifest.mf).
Thus user will be able to code/compile/run jruby.
This same trick can be used if we want the user to dynamically specify a DB driver
jar and connect to a db using a plugin already installed in his environment.
Say com.myProduct.dbExplorer plugin will load classes from the jar to be specified
by users during runtime.
(4) So far we depend only on Eclipse Bundle-ClassLoader and we configure eclipse
in such a way (either development-time / runtime) that all required jars will be loaded
by the classloader of the bundle in which jars are packed.
But what if we need to access a class which can not be loaded by the bundle-
classloader ?
3. We need to set certain jars in custom classloader so the classes bundled in the jar can
be loaded on demand !
A typical scenario is com.xyz.MyProduct.library contains scriptDebugger.jar (some
3rdparty jar) whose api need to be invoked during runtime and the api class will
access some class of jruby.jar (may be specified by user during runtime) which can't
be packed inside the product.
//The follwoing piece-of-code should be part of the
com.xyz.myProduct.ScriptManager to load classes from jruby jar that user will
specify during runtime.
// gather the names and loacation of jars as provided by user through preference page
after product is deployed.
String[] jarslist = DynamicJarLoader.getThirdPartyJars();
URL[] jarURLs = new URL[jarslist.length];
JarFileLoader newLoader = new JarFileLoader(jarURLs);
for (int i = 0; i < jarslist.length; i++) {
newLoader.addFile (jarslist[i]);
}
class JarFileLoader extends URLClassLoader
{
public JarFileLoader (URL[] urls)
{
super (urls);
}
public void addFile (String path) throws MalformedURLException
{
String urlPath = "jar:file://" + path + "!/";
addURL (new URL (urlPath));
}
}
Now swap bundleclassloader with your classloader !
ClassLoader currentLoader = Thread.currentThread().getContextClassLoader();
try {
current.setContextClassLoader( newLoader);
// Either Load reqd. classes and work with them
newLoader.loadClass ("org.jruby.JRubyClient");
newLoader.loadClass ("org.hsqldb.jdbcDriver");
newLoader.loadClass("oracle.jdbc.driver.OracleDriver");
// Or invoke some other api (of scriptRunner.jar which will load JRuby classes to
compile/run jruby script)
}catch(Exception exception) {