Switch.java

 import java.util.scanner;
 public class Switch {
 public static void main(String[] args){
 System.out.println("Enter your option too know the reward");
 Scanner obj = new Scanner(System.in);
 int choice = obj.nextInt();

 switch(choice){
 case 1:
 System.out.println("you got a jackpot");
 break;
 case 2:
 System.out.println("your fined");
 break;
 case 3:
 System.out.println("null space");
 break;
 case 4:
 System.out.println("Welcome to the world of luck");
 break;
 default:
 System.out.println("Try again later!!!");
 }
 }
}
 
 Java Switch
Java Switch Statements
Instead of writing many if..else statements, you can use the switch statement.

The switch statement selects one of many code blocks to be executed:

SyntaxGet your own Java Server
switch(expression) {
 case x:
 // code block
 break;
 case y:
 // code block
 break;
 default:
 // code block
}
This is how it works:

The switch expression is evaluated once.
The value of the expression is compared with the values of each case.
If there is a match, the associated block of code is executed.
The break and default keywords are optional, and will be described later in this chapter
The example below uses the weekday number to calculate the weekday name:

Example
int day = 4;
switch (day) {
 case 1:
 System.out.println("Monday");
 break;
 case 2:
 System.out.println("Tuesday");
 break;
 case 3:
 System.out.println("Wednesday");
 break;
 case 4:
 System.out.println("Thursday");
 break;
 case 5:
 System.out.println("Friday");
 break;
 case 6:
 System.out.println("Saturday");
 break;
 case 7:
 System.out.println("Sunday");
 break;
}
// Outputs "Thursday" (day 4)

The break Keyword
When Java reaches a break keyword, it breaks out of the switch block.

This will stop the execution of more code and case testing inside the block.

When a match is found, and the job is done, it's time for a break. There is no need for more testing.

A break can save a lot of execution time because it "ignores" the execution of all the rest of the code in the switch block.

The default Keyword
The default keyword specifies some code to run if there is no case match: will get excuted!!