How do you handle exceptions in Java with example?
How do you handle exceptions in Java with example?
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18-Jul-2024
Ravi Vishwakarma
19-Jul-2024Exceptions are handled using a combination of
try,catch,finally, andthrowstatements. Here's a detailed overview of how to handle exceptions in Java, including an example.Basic Exception Handling
Try Block: Code that might throw an exception is placed inside a
tryblock. If an exception occurs, the code execution immediately jumps to the correspondingcatchblock.Catch Block: This block catches the exception thrown by the
tryblock. You can have multiplecatchblocks to handle different types of exceptions.Finally Block: This block is optional and is used for code that must execute regardless of whether an exception was thrown or not, such as closing resources.
Throw Statement: Used to explicitly throw an exception from a method or block of code.
Throws Clause: Used in method declarations to specify that a method can throw certain types of exceptions.
Example
Here is an example of handling exceptions in Java. This example demonstrates handling an arithmetic exception and a file not found exception.
Output:
Explanation
Arithmetic Exception Handling:
tryblock attempts to divide a number by zero, which throws anArithmeticException.catchblock catches the exception and prints an error message.finallyblock is executed regardless of whether an exception was thrown, ensuring that the code within it runs.File Not Found Exception Handling:
tryblock attempts to open a file for writing. Since the file does not exist, it throws aFileNotFoundException.catchblock catches the exception and prints an error message.finallyblock is executed regardless of the exception, ensuring that the code within it runs.Summary
tryBlock: Contains code that might throw an exception.catchBlock: Catches and handles exceptions.finallyBlock: Executes code that must run regardless of whether an exception was thrown.throwStatement: Used to explicitly throw an exception.throwsClause: Used in method signatures to declare that a method can throw exceptions.Exception handling is crucial for building robust Java applications, allowing you to manage errors gracefully and maintain program flow.
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