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Java Switch


The Java switch statement is executes one statement from multiple conditions. It is like if-else-if ladder statement.

Syntax:

  1. switch(expression){
  2. case value1:
  3.  //code to be executed;  
  4.  break;  //optional
  5. case value2:
  6.  //code to be executed;  
  7.  break;  //optional
  8. ……
  9. default:
  10.  code to be executed if all cases are not matched;
  11. }

cswitch

Example:

  1. public class SwitchExample {
  2. public static void main(String[] args) {
  3.     int number=20;
  4.     switch(number){
  5.     case 10: System.out.println(“10”);break;
  6.     case 20: System.out.println(“20”);break;
  7.     case 30: System.out.println(“30”);break;
  8.     default:System.out.println(“Not in 10, 20 or 30”);
  9.     }
  10. }
  11. }

Output:

20

Java Switch Statement if fall-through

The java switch statement is fall-through. It means it executes all statement after first match if break statement is not used with switch cases.

Example:

  1. public class SwitchExample2 {
  2. public static void main(String[] args) {
  3.     int number=20;
  4.     switch(number){
  5.     case 10: System.out.println(“10”);
  6.     case 20: System.out.println(“20”);
  7.     case 30: System.out.println(“30”);
  8.     default:System.out.println(“Not in 10, 20 or 30”);
  9.     }
  10. }
  11. }

Output:

20
30
Not in 10, 20 or 30

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