Exception Handling in Java

Exception Handling in Java

Exception handling in Java is a powerful mechanism that is used to handle runtime errors, allowing the normal flow of the application to be maintained. Java uses five keywords to handle exceptions: try, catch, throw, throws, and finally.

Types of Exceptions

• Checked Exceptions: Exceptions that are checked at compile-time.
• Unchecked Exceptions: Exceptions that are not checked at compile-time but at runtime.
• Errors: Serious problems that are not expected to be caught by applications.

Exception Handling Keywords

• try: Block of code to be monitored for exceptions.
• catch: Block of code to handle the exception.
• throw: Used to explicitly throw an exception.
• throws: Used to declare an exception.
• finally: Block of code that will always execute, regardless of whether an exception occurs or not.

Example of Exception Handling

public class Main {
    public static void main(String[] args) {
        try {
            int divideByZero = 5 / 0;
            System.out.println("Result: " + divideByZero);
        } catch (ArithmeticException e) {
            System.out.println("ArithmeticException: " + e.getMessage());
        } finally {
            System.out.println("This is the finally block.");
        }
    }
}
      

In this example, the try block contains code that might throw an exception. The catch block handles the specific exception, and the finally block executes regardless of whether an exception is thrown or not.

Effective exception handling is crucial for building robust and reliable Java applications. Stay tuned for more articles and tutorials on Java programming.