java-switch

Java Switch Statement

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

Syntax:

switch(expression){    

case value1:    

 //code to be executed;    

 break;  //optional  

case value2:    

 //code to be executed;    

 break;  //optional  

......    

    

default:     

 code to be executed if all cases are not matched;    

}   

  

Example:

public class SwitchExample {  

public static void main(String[] args) {  

    int number=20;  

    switch(number){  

    case 10: System.out.println("10");break;  

    case 20: System.out.println("20");break;  

    case 30: System.out.println("30");break;  

    default:System.out.println("Not in 10, 20 or 30");  

    }  

}  

}

   

Output:

20

Java Switch Statement is 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:

public class SwitchExample2 {  

public static void main(String[] args) {  

    int number=20;  

    switch(number){  

    case 10: System.out.println("10");  

    case 20: System.out.println("20");  

    case 30: System.out.println("30");  

    default:System.out.println("Not in 10, 20 or 30");  

    }  

}  

} 

  

Output:

20
30
Not in 10, 20 or 30