Exceptions in Java allow errors to be handled separately from main program logic. Exceptions break normal program flow and can be caught and handled in catch blocks. There are checked exceptions that must be caught or declared as thrown, and unchecked exceptions like RuntimeException that do not require handling. Finally blocks are always executed to cleanup resources whether an exception occurs or not.
JAVA EXCEPTION HANDLING
N.V.Raja Sekhar Reddy
www.technolamp.co.in
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Java - Exceptions. An exception (or exceptional event) is a problem that arises during the execution of a program. When an Exception occurs the normal flow of the program is disrupted and the program/Application terminates abnormally, which is not recommended, therefore, these exceptions are to be handled.
Exception is an error event that can happen during the execution of a program and disrupts its normal flow. Java provides a robust and object oriented way to handle exception scenarios, known as Java Exception Handling.
what is exception?
what is exception handling?
When occur Exception in a program?
Why we use exception handling macanisum?
explain try, catch, finally keywords.
try,catch and finally-Rules.
Types of Exception.
example of Some java Pre-defined /Built-in exception class.
User-defined Eceptions
Exception in java?
The Exception Handling in Java is one amongst the powerful mechanism to handle the runtime errors so traditional flow of the program will be maintained.
Applet is a special type of program that is embedded in the webpage to generate the dynamic content.
The exception hierarchy
Exception handling fundamentals
Try and catch
The consequences of an uncaught exception
Using multiple catch statements
Catching subclass exceptions
Nested try blocks
Throwing an exception
Re-throwing an exception
Using finally
Using throws
Java’s built-in exception
Creating exception subclasses
JAVA EXCEPTION HANDLING
N.V.Raja Sekhar Reddy
www.technolamp.co.in
Want more interesting...
Watch and Like us @ https://www.facebook.com/Technolamp.co.in
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Java - Exceptions. An exception (or exceptional event) is a problem that arises during the execution of a program. When an Exception occurs the normal flow of the program is disrupted and the program/Application terminates abnormally, which is not recommended, therefore, these exceptions are to be handled.
Exception is an error event that can happen during the execution of a program and disrupts its normal flow. Java provides a robust and object oriented way to handle exception scenarios, known as Java Exception Handling.
what is exception?
what is exception handling?
When occur Exception in a program?
Why we use exception handling macanisum?
explain try, catch, finally keywords.
try,catch and finally-Rules.
Types of Exception.
example of Some java Pre-defined /Built-in exception class.
User-defined Eceptions
Exception in java?
The Exception Handling in Java is one amongst the powerful mechanism to handle the runtime errors so traditional flow of the program will be maintained.
Applet is a special type of program that is embedded in the webpage to generate the dynamic content.
The exception hierarchy
Exception handling fundamentals
Try and catch
The consequences of an uncaught exception
Using multiple catch statements
Catching subclass exceptions
Nested try blocks
Throwing an exception
Re-throwing an exception
Using finally
Using throws
Java’s built-in exception
Creating exception subclasses
unit 4 msbte syallbus for sem 4 2024-2025AKSHAYBHABAD5
The Intel 8086 microprocessor, designed by Intel in the late 1970s, is an 8-bit/16-bit microprocessor and the first member of the x86 family of microprocessors1. Here’s a brief overview of its internal architecture:
Complex Instruction Set Computer (CISC) Architecture: The 8086 microprocessor is based on a CISC architecture, which supports a wide range of instructions, many of which can perform multiple operations in a single instruction1.
Bus Interface Unit (BIU): The BIU is responsible for fetching instructions from memory and decoding them, while also managing data transfer between the microprocessor and memory or I/O devices1.
Execution Unit (EU): The EU executes the instructions1.
Memory Segmentation: The 8086 microprocessor has a segmented memory architecture, which means that memory is divided into segments that are addressed using both a segment register and an offset1.
Registers: The 8086 microprocessor has a rich set of registers, including general-purpose registers, segment registers, and special registers
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
2. What is an exception?
An exception is an error condition that changes the normal
flow of control in a program
Exceptions in Java separates error handling from main
business logic
Based on ideas developed in Ada, Eiffel and C++
Java has a uniform approach for handling all synchronous
errors
• From very unusual (e.g. out of memory)
• To more common ones your program should check itself (e.g. index out
of bounds)
• From Java run-time system errors (e.g., divide by zero)
• To errors that programmers detect and raise deliberately
3. Throwing and catching
An error can throw an exception
throw <exception object>;
By default, exceptions result in the thread
terminating after printing an error message
However, exception handlers can catch specified
exceptions and recover from error
catch (<exception type> e) {
//statements that handle the
exception
}
4. Throwing an exception
• Example creates a subclass of Exception and throws an exception:
class MyException extends Exception { }
class MyClass {
void oops()
{ if (/* no error occurred */)
{ /* normal processing */ }
else { /* error occurred */
throw new MyException();
}
} //oops
}//class MyClass
5. Exceptional flow of control
Exceptions break the normal flow of control.
When an exception occurs, the statement that
would normally execute next is not executed.
What happens instead depends on:
◦ whether the exception is caught,
◦ where it is caught,
◦ what statements are executed in the ‘catch block’,
◦ and whether you have a ‘finally block’.
6. Approaches to handling an exception
1. Prevent the exception from happening
2. Catch it in the method in which it occurs, and either
a. Fix up the problem and resume normal execution
b. Rethrow it
c. Throw a different exception
3. Declare that the method throws the exception
4. With 1. and 2.a. the caller never knows there was an error.
5. With 2.b., 2.c., and 3., if the caller does not handle the
exception, the program will terminate and display a stack
trace
8. Java is strict
Unlike C++, is quite strict about catching exceptions
If it is a checked exception
◦ (all except Error, RuntimeException and their subclasses),
◦ Java compiler forces the caller must either catch it
◦ or explicitly re-throw it with an exception specification.
Why is this a good idea?
By enforcing exception specifications from top to bottom, Java
guarantees exception correctness at compile time.
Here’s a method that ducks out of catching an exception by
explicitly re-throwing it:
void f() throws tooBig, tooSmall, divZero {
◦ The caller of this method now must either catch these exceptions or
rethrow them in its specification.
9. Error and RuntimeException
Error
◦ “unchecked”, thus need not be in ‘throws’ clause
◦ Serious system problems (e.g. ThreadDeath, OutOfMemoryError)
◦ It’s very unlikely that the program will be able to recover, so generally
you should NOT catch these.
RuntimeException
◦ “unchecked”, thus need not be in ‘throws’ clause
◦ Also can occur almost anywhere, e.g. ArithmeticException,
NullPointerException, IndexOutOfBoundsException
◦ Try to prevent them from happening in the first place!
System will print stop program and print a trace
10. Catching an exception
try { // statement that could throw an exception
}
catch (<exception type> e) {
// statements that handle the exception
}
catch (<exception type> e) { //e higher in hierarchy
// statements that handle the exception
}
finally {
// release resources
}
//other statements
• At most one catch block executes
• finally block always executes once, whether there’s an error or not
11. Execution of try catch blocks
• For normal execution:
– try block executes, then finally block executes, then other statements execute
• When an error is caught and the catch block throws an exception or returns:
– try block is interrupted
– catch block executes (until throw or return statement)
– finally block executes
• When error is caught and catch block doesn’t throw an exception or return:
– try block is interrupted
– catch block executes
– finally block executes
– other statements execute
• When an error occurs that is not caught:
– try block is interrupted
– finally block executes
13. Catch processing
• When an exception occurs, the nested try/catch statements are searched
for a catch parameter matching the exception class
• A parameter is said to match the exception if it:
– is the same class as the exception; or
– is a superclass of the exception; or
– if the parameter is an interface, the exception class implements the interface.
• The first try/catch statement that has a parameter that matches the
exception has its catch statement executed.
• After the catch statement executes, execution resumes with the finally
statement, then the statements after the try/catch statement.
15. Declaring an exception type
• Inherit from an existing exception type.
• Provide a default constructor
• and a constructor with one arg, type String.
• Both should call super(astring);
• Example:
class MyThrowable extends Throwable {
// checked exception
MyThrowable () {
super ("Generated MyThrowable");
}
MyThrowable (String s) { super (s); }
}
16. Declaring an exception type
• Inherit from an existing exception type.
• Provide a default constructor
• and a constructor with one arg, type String.
• Both should call super(astring);
class ErrorThrower {
public void errorMethod() throws MyThrowable
{ throw new MyThrowable ("ErrorThrower");
// forces this method to declare MyThrowable
}
}
17. Exceptions are ubiquitous in Java
• Exception handling required for all read methods
– Also many other system methods
• If you use one of Java's built in class methods and it throws
an exception, you must catch it (i.e., surround it in a
try/catch block) or rethrow it, or you will get a compile
time error:
char ch;
try { ch = (char) System.in.read(); }
catch (IOException e)
{ System.err.println(e); return;