How do I use the switch statement?

The program below demonstrate how to use the switch statement. The switch statement can work with the byte, short, int and char primitive data types and the corresponding wrappers of these data type such as Byte, Short, Integer and Character. It also work with work with enumerated types, refer to the following example: How do I use enum in switch statement?.

The switch block or the body can contains one or more case or default labels. The switch statement evaluates its expression and evaluate the appropriate case.

You’ll also notice that after each case labels we have a break statement. This break statement causes the program execution to continue outside the switch block. Without using a break the case will fall-through to another case or default label.

package org.kodejava.example.lang;

import java.util.Scanner;

public class SwitchDemo {
    public static void main(String[] args) {
        System.out.println("The Planets");
        System.out.println("===================================");
        System.out.println("1. Mercury");
        System.out.println("2. Venus");
        System.out.println("3. Earth");
        System.out.println("4. Mars");
        System.out.println("5. Jupiter");
        System.out.println("6. Saturn");
        System.out.println("7. Uranus");
        System.out.println("8. Neptune");
        System.out.println("");
        System.out.print("Please choose your favorite destination: ");

        Scanner scanner = new Scanner(System.in);
        int destination = scanner.nextInt();

        System.out.print("Welcome to ");
        switch (destination) {
            case 1:
                System.out.println("Mercury");
                break;
            case 2:
                System.out.println("Venus");
                break;
            case 3:
                System.out.println("Earth");
                break;
            case 4:
                System.out.println("Mars");
                break;
            case 5:
                System.out.println("Jupiter");
                break;
            case 6:
                System.out.println("Saturn");
                break;
            case 7:
                System.out.println("Uranus");
                break;
            case 8:
                System.out.println("Neptune");
                break;
            default:
                System.out.println("Invalid Destination");
        }
    }
}

When you run the program you’ll have to following on the screen:

The Planets
===================================
1. Mercury
2. Venus
3. Earth
4. Mars
5. Jupiter
6. Saturn
7. Uranus
8. Neptune

Please choose your favorite destination: 3
Welcome to Earth

Wayan

Programmer, runner, recreational diver, live in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA. Support me by donating >> here <<.

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