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jaman
answered May 1 '23 00:00
an exception is an event that occurs during the execution of a program and disrupts the normal flow of instructions . When an exception occurs, it is said to have been "thrown" by the code that caused it, and the execution of the program is temporarily halted until the exception is handled.
Exceptions can be caused by a variety of factors , including invalid user input, unexpected conditions or errors in the program, or external factors such as network outages or file system errors. In Java, exceptions are handled using a combination of try-catch blocks, finally blocks, and throw statements.
The try-catch block is used to catch exceptions that are thrown by the code in the try block. The catch block specifies the type of exception to be caught and the code to be executed when the exception is caught.
The finally block is used to specify code that must be executed , regardless of whether an exception is thrown or not. This block is often used to release resources that were acquired in the try block, such as file handles or database connections.
The throw statement is used to explicitly throw an exception from the code . This can be used to indicate an error condition or to handle unexpected situations.
Java provides a wide range of exception classes that can be used to handle different types of exceptions, from simple input errors to complex network or database errors. Developers can also define their own exception classes to handle custom exception scenarios.
Proper exception handling is an important part of writing robust and reliable code, as it helps to identify and handle errors and prevent unexpected program behavior.