Exception handling in java is a powerful mechanism designed to handle runtime errors, ensuring the normal flow of the application.
Concept of Exception in Java
An exception in Java is an event that disrupts the normal flow of the program. It’s an object which is thrown at runtime. When an exception occurs within a method, it creates an exception object that contains information about the exception, including its type and the state of the program when the error occurred.
Purpose of Exception Handling
Purpose of Exception Handling The primary purpose of exception handling is to maintain the normal flow of the application. An exception usually disrupts the normal flow of the application, and that’s why we need to handle exceptions. For instance, if there are 10 statements in a program and an exception occurs at the 5th statement, the rest of the code (statements 6 to 10) will not be executed. However, when we perform exception handling, the rest of the statements will be executed.
Types of Exceptions
Java defines several types of exceptions that relate to its various class libraries. Java also allows users to define their own exceptions. Exceptions can be categorized into:
✦ Built-in Exceptions: These are the exceptions that are available in Java libraries.
✦ Checked Exceptions: Checked exceptions are called compile-time exceptions because these exceptions are checked at compile-time by the compiler.
✦ Unchecked Exceptions: The unchecked exceptions are just opposite to the checked exceptions. The compiler will not check these exceptions at compile time.
✦ User-Defined Exceptions: Users can define their own exceptions.
Remember, proper exception handling can improve a Java application’s robustness and performance capabilities. It’s an essential part of writing a reliable and fault-tolerant Java program.
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