Java catch Keyword

The catch keyword in Java is used in a try-catch block to handle exceptions that may be thrown during the execution of a program.

A try-catch block has the following syntax:

try {
  // Code that may throw an exception
} catch (ExceptionType exceptionVariable) {
  // Code to handle the exception
}

Here, the try block contains the code that may throw an exception, and the catch block contains the code that will be executed if an exception is thrown. The ExceptionType parameter specifies the type of exception that the catch block can handle, and the exceptionVariable is a variable that will hold the exception object if an exception is thrown.

For example, consider the following code:

try {
  int x = 5 / 0;
} catch (ArithmeticException e) {
  System.out.println("An arithmetic exception occurred: " + e.getMessage());
}

In this code, the try block contains a division by zero operation, which will throw an ArithmeticException. The catch block will handle this exception and print a message to the console.

You can have multiple catch blocks to handle different types of exceptions. For example:

try {
  // Code that may throw an exception
} catch (ExceptionType1 exceptionVariable1) {
  // Code to handle ExceptionType1
} catch (ExceptionType2 exceptionVariable2) {
  // Code to handle ExceptionType2
}

It's important to note that the order of the catch blocks matters. The exception will be caught by the first catch block whose ExceptionType is compatible with the exception that was thrown. If none of the catch blocks can handle the exception, it will be propagated up to the calling method.