The document discusses exception handling in Java. It begins by defining what errors and exceptions are, and how traditional error handling works. It then explains how exception handling in Java works using keywords like try, catch, throw, throws and finally. The document discusses checked and unchecked exceptions, common Java exceptions, how to define custom exceptions, and rethrowing exceptions. It notes advantages of exceptions like separating error handling code and propagating errors up the call stack.
In Java 8, the java.util.function has numerous built-in interfaces. Other packages in the Java library (notably java.util.stream package) make use of the interfaces defined in this package. Java 8 developers should be familiar with using key interfaces provided in this package. This presentation provides an overview of four key functional interfaces (Consumer, Supplier, Function, and Predicate) provided in this package.
in this tutorial we will discuss about
exception handling in C#
Exception class
creating user-defined exception
throw keyword
finally keyword
with examples'
In Java 8, the java.util.function has numerous built-in interfaces. Other packages in the Java library (notably java.util.stream package) make use of the interfaces defined in this package. Java 8 developers should be familiar with using key interfaces provided in this package. This presentation provides an overview of four key functional interfaces (Consumer, Supplier, Function, and Predicate) provided in this package.
in this tutorial we will discuss about
exception handling in C#
Exception class
creating user-defined exception
throw keyword
finally keyword
with examples'
Chapter 02: Classes Objects and Methods Java by Tushar B KuteTushar B Kute
The lecture was condcuted by Tushar B Kute at YCMOU, Nashik through VLC orgnanized by MSBTE. The contents can be found in book "Core Java Programming - A Practical Approach' by Laxmi Publications.
JSP technology has facilitated the segregation of the work of a Web designer and a Web developer.
A Web designer can design and formulate the layout for the Web page by using HTML.
On the other hand, a Web developer working independently can use java code and other JSP specific tags to code the business logic.
The simultaneous construction of the static and dynamic content facilitates development of quality applications with increased productivity.
Java abstract class & abstract methods,Abstract class in java
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
Chapter 02: Classes Objects and Methods Java by Tushar B KuteTushar B Kute
The lecture was condcuted by Tushar B Kute at YCMOU, Nashik through VLC orgnanized by MSBTE. The contents can be found in book "Core Java Programming - A Practical Approach' by Laxmi Publications.
JSP technology has facilitated the segregation of the work of a Web designer and a Web developer.
A Web designer can design and formulate the layout for the Web page by using HTML.
On the other hand, a Web developer working independently can use java code and other JSP specific tags to code the business logic.
The simultaneous construction of the static and dynamic content facilitates development of quality applications with increased productivity.
Java abstract class & abstract methods,Abstract class in java
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
Fast Food is no good to our health. Eating minimal quantity to change taste is good, Instead of taking a lot on daily basis.
Life lies in Health, so maintain your health Good. Enjoy!!!
Corruption in Pakistan, serve as the root cause of all the problems which we are facing now a days, so u can have a look, that what are the causes, effects and solution to corruption, in Pakistan. For complete detail report write me at riazgulsheikh@gmail.com
Exceptions are a powerful mechanism for centralized processing of errors and exceptional situations. This mechanism replaces the procedure-oriented method of error handling in which each function returns a code indicating an error or a successful execution.
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.
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
JAVA EXCEPTION HANDLING
N.V.Raja Sekhar Reddy
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Processes and Threads, Runnable Interface and Thread Class Thread Objects, Defining and Starting a Thread, Pausing Execution with Sleep, Interrupts, Thread States, Joins, Synchronization
Database Programming: The Design of JDBC, The Structured Query Language, Basic JDBC Programming Concepts,
Result Sets, Metadata, Row Sets, Transactions
Class importing, Creating a Package, Naming a Package, Using Package Members,
Managing Source and Class Files. Developing and deploying (executable) Jar File.
Superclasses, and Subclasses, Overriding and Hiding Methods, Polymorphism, Inheritance Hierarchies, Super keyword, Final Classes and Methods, Abstract,
Classes and Methods, Nested classes & Inner Classes,
finalization and garbage collection.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
2. 2
Errors and Error Handling
An Error is any unexpected result obtained from a program during
execution.
Unhandled errors may manifest themselves as incorrect results or
behavior, or as abnormal program termination.Errors should be handled
by the programmer.
Traditional Error Handling
1.Every method returns a value (flag) indicating either success, failure,
or some error condition. The calling method checks the return flag and
takes appropriate action.
Downside: programmer must remember to always check the return
value and take appropriate action. This requires much code (methods
are harder to read) and something may get overlooked.
3. 3
Traditional Error Handling
2. Create a global error handling routine, and use some form of
“jump” instruction to call this routine when an error occurs.
Downside: “jump” instruction (GoTo) are considered “bad
programming practice” and are discouraged. Once you jump to the
error routine, you cannot return to the point of origin and so must
(probably) exit the program.
Exceptions act similar to method return flags in that any method may
raise and exception should it encounter an error.
Exceptions act like global error methods in that the exception
mechanism is built into Java; exceptions are handled at many levels
in a program, locally and/or globally.
4. Exception
Due to design errors or coding errors, our programs may fail in
unexpected ways during execution.
It is our responsibility to produce quality code that does not fail
unexpectedly.
Consequently, we must design error handling into our programs.
An exception is a special type of error object that is created when
something goes wrong in a program.
After Java creates the exception object, it sends it to program, this action
called throwing an exception. It's up to our program to catch the
exception.
5. 5
An exception is a representation of an error condition or a situation
that is not the expected result of a method.
Exceptions are built into the Java language and are available to all
program code.
Exceptions isolate the code that deals with the error condition from
regular program logic.
When an error is detected, an exception is thrown
Any exception which is thrown, must be caught by and exception
handler
If the programmer hasn't provided one, the exception will be caught
by a catch-all exception handler provided by the system.
6. 6
The default exception handler may terminate the application.
Exceptions can be rethrown if the exception cannot be handled by the
block which caught the exception
Java has 5 keywords for exception handling:
1.try
2.catch
3.finally
4.throw
5.Throws
7. 7
Exception -Class Hierarchy
Throwable
+ Throwable(String message)
+ getMessage(): String
+ printStackTrace():void
Error Exception
Errors: An error represents a condition
serious enough that most reasonable
applications should not try to catch.
- Virtual Machine Error
- out of memory
- stack overflow
- Thread Death
- Linkage Error
Exceptions: An error which reasonable
applications should catch
- Array index out of bounds
- Arithmetic errors (divide by zero)
- Null Pointer Exception
- I/O Exceptions
See the Java API Specification for more.
8. 8
Exceptions -Checked and Unchecked
Java allows for two types of exceptions:
1.Checked.
If your code invokes a method which is defined to throw checked
exception, your code MUST provide a catch handler
The compiler generates an error if the appropriate catch handler is not
Present
2.Unchecked
These exceptions can occur through normal operation of the virtual
machine. You can choose to catch them or not.
If an unchecked exception is not caught, it will go to the default catch-all
handler for the application
All Unchecked exceptions are subclassed from RuntimeException
9. 9
Common Java Exceptions.
ArithmeticException :Caused by math errors such as division by zero
ArrayIndexOutOfBoundsException:Caused by bad array indexes
ArrayStoreException: Caused when a program tries to store the wrong
type of data in an array
FileNotFoundException: Caused by an attempt to access a nonexistent
file
IOException: Caused by general I/O failures, such as inability to read
from a file
NullPointerException: Caused by referencing a null object
NumberFormatException: Caused when a conversion between strings
and numbers fails
10. 10
OutOfMemoryException: Caused when there's not enough memory to
allocate a new object
SecurityException: Caused when an applet tries to perform an action not
allowed by the browser'ssecurity setting
StackOverflowException: Caused when the system runs out of stack
space
StringIndexOutOfBoundsException:Caused when a program attempts to
access a nonexistent characterposition in a string
11. 11
Exceptions –Syntax
try
{ // Code which might throw an exception
// ...
}
catch(FileNotFoundException x)
{ // code to handle a FileNotFound exception }
catch(IOException x)
{ // code to handle any other I/O exceptions }
catch(Exception x)
{ // Code to catch any other type of exception }
finally
{ // This code is ALWAYS executed whether an exception was
thrown
// or not. A good place to put clean-up code. ie. close
// any open files, etc...
}
12. 12
Try-Catch Mechanism
Wherever your code may trigger an exception, the normal code logic
is placed inside a block of code starting with the “try” keyword:
After the try block, the code to handle the exception should it arise is
placed in a block of code starting with the “catch” keyword.
You may also write an optional “finally” block. This block contains
code that is ALWAYS executed, either after the “try” block code, or
after the “catch” block code.
Finally blocks can be used for operations that must happen no matter
what (i.e. cleanup operations such as closing a file)
13. 13
throws keyword
The throws keyword is used in method declaration, in order to explicitly
specify the exceptions that a particular method might throw.
When a method declaration has one or more exceptions defined using
throws clause then the method-call must handle all the defined
exceptions.
When defining a method you must include a throws clause to declare
those exceptions that might be thrown but doesn’t get caught in the
method.
If a method is using throws clause along with few exceptions then this
implicitly tells other methods that – “ If you call me, you must handle
these exceptions that I throw”.
Syntax of Throws in java:
void MethodName() throws ExceptionName{ Statement1 ... ... }
14. 14
throw Keyword
By default, when an exception condition occurs the system automatically
throw an exception to inform user that there is something wrong.
However we can also throw exception explicitly based on our own
defined condition.
Using “throw keyword” we can throw checked, unchecked and user
-defined exceptions.
15. 15
public class ThrowExample
{
static void checkEligibilty(int stuage, int stuweight)
{
if(stuage<12 && stuweight<40)
{ throw new ArithmeticException("Student is not eligible
for registration");
}
else
{ System.out.println("Entries Valid!!"); }
}
public static void main(String args[])
{
System.out.println("Welcome to the Registration process!!");
checkEligibilty(10, 39);
System.out.println("Have a nice day..");
}
}
16. 16
import java.io.*;
class Example
{
public static void main(String args[]) throws IOException
{
FileInputStream fis = null;
fis = new FileInputStream("B:/myfile.txt");
int k;
while(( k = fis.read() ) != -1)
{
System.out.print((char)k);
}
fis.close();
}
}
Declare the exception in the method using throws keyword.
17. 17
import java.io.*;
class Example
{ public static void main(String args[])
{ FileInputStream fis = null;
try{
fis = new FileInputStream("B:/myfile.txt");
}catch(FileNotFoundException fnfe)
{
System.out.println("The specified file is not exist);
}
int k;
try{
while(( k = fis.read() ) != -1)
{ System.out.print((char)k); }
fis.close();
}catch(IOException ioe)
{ System.out.println("I/O error occurred: "+ioe); }
}
18. 18
Throw vs Throws in java
1. Throws clause in used to declare an exception and thow keyword is
used to throw an exception explicitly.
2. If we see syntax wise than throw is followed by an instance variable
and throws is followed by exception class names.
3. The keyword throw is used inside method body to invoke an exception
and throws clause is used in method declaration (signature).
4.By using Throw keyword in java you cannot throw more than one
exception but using throws you can declare multiple exceptions. PFB the
examples.
19. 19
User defined exception
User defined exceptions in java are also known as Custom exceptions.
Most of the times when we are developing an application in java, we
often feel a need to create and throw our own exceptions. These
exceptions are known as User defined or Custom exceptions.
class MyException extends Exception
{
String str1;
MyException(String str2)
{
str1=str2;
}
public String toString()
{
return ("Output String = "+str1) ;
}
}
20. 20
class CustomException
{
public static void main(String args[])
{
try
{
throw new MyException("Custom");
// I'm throwing user defined custom exception above
} catch(MyException exp)
{
System.out.println("Hi this is my catch block") ;
System.out.println(exp) ;
}
}
}
21. 21
Defining Your Own Exceptions
To define your own exception you must do the following:
Create an exception class to hold the exception data.Your exception class
must subclass "Exception" or another exception class
To create unchecked exceptions, subclass the RuntimeException class.
Minimally, your exception class should provide a constructor which takes
the exception description as its argument.
To throw your own exceptions:
If your exception is checked, any method which is going to throw the
exception must define it using the throws keyword
When an exceptional condition occurs, create a new instance of the
exception and throw it.