JAVA BASICS - HOW TO USE A STRING IN SWITCH STATEMENTS

Simple example to switch statements using string.

Syntax :

switch(String variable)

{

case "" :

case "" :

case "" :

:

:

.

}

Example :

1. public class StringSwitchDemo
2. {
3. public static void main(String[] args)
4. {
5.                StringSwitchDemo demo = new StringSwitchDemo();
6.                String day = "Sunday";
7.                switch (day)
8.                {
9.                               case "Sunday":
10.                               demo.doSomething();
11.                               break;
12.                               case "Monday":
13.                               demo.doSomethingElse();
14.                               break;
15.                               case "Tuesday":
16.                               case "Wednesday":
17.                               demo.doSomeOtherThings();
18.                               break;
19.                               default:
20.                               demo.d oDefault();
21.                               break;   
22.                }
23. }
24.  
25. private void doSomething() {
26.      System.out.println("You typed Sunday");
27. }
28.  
29. private void doSomethingElse() {
30.      System.out.println("You typed Monday");
31. }
32.  
33. private void doSomeOtherThings() {
34.      System.out.println("StringSwitchDemo.doSomeOtherThings");
35. }
36.  
37. private void doDefault() {
38.      System.out.println("You typed Wednesday");
39. }
40. }

Description :

Step 1:Starting of class

Step 3:Start of main function.

Step 5:Object of class is created.

Step 6:String variable "day" is assigned a string value "Sunday".This value can be kept any  string and accordingly switch cases must be modified.Here whatever the value of variable "day" is that particular case is executed.

Step 11: Break keyword is used to neglect all the further cases.That is only one case is executed at a time.

Step 25 - Step 38 : These are user defined functions that are called when cases are executed and corresponding message is displayed on the screen.