Java 7 : Use Switch With String

In the JDK 7 release, you can use a String object in the expression of a switch statement.

Comparing string object is case sensitive.

   1: public class TEST {

   2:  

   3:     public static void testSwt(String testswitch) {

   4:         String tw;

   5:         switch (testswitch) {

   6:             case "teststr":

   7:                 tw = "TestingSwitch with String";

   8:                 break;

   9:             case "testswitch2":

  10:                 tw = "Testing Switch with String one";

  11:                 break;

  12:             case "testswitch3":

  13:                 tw = "Testing Switch with String two";

  14:                 break;

  15:             default:

  16:                 tw = "ERROR";

  17:                 break;

  18:         }

  19:         System.out.println(tw);

  20:  

  21:     }

  22:  

  23:     public static void main(String[] args) {

  24:         String strswitch = "teststr";

  25:         TEST.testSwt(strswitch);

  26:  

  27:     }

  28: }

The Java compiler generates generally more efficient bytecode from switch statements that use String objects than from chained if-then-else statements.