Exception Handling Keywords in Java

What is an Exception? An exception is an unwanted event that occurs during program execution. Example: Dividing a number by zero Accessing null object File not found 1. try Block The try block contains code that may cause an exception. Syntax: try { // risky code } Example: try { int a = 10 / 0 ; // exception } Where we use: --> Database operations --> File handling --> Network calls 2. catch Block The catch block handles the exception thrown in the try. Syntax: catch(Exception e) { // handling code } Example: try { int a = 10 / 0 ; } catch ( ArithmeticException e ) { System . out . println ( "Cannot divide by zero" ); } Where we use: --> To show user-friendly messages --> To prevent program crash 3. finally Block The finally block always executes whether an exception occurs or not. Syntax: finally { // cleanup code } Example: try { int a = 10 / 2 ; } catch ( Exception e ) { System . out . println ( "Error" ); } finally { System . out . println ( "Always executed" ); } Real-time use: -