Using Switch case for String objects using enum in Java

Example of String in Switch prior JDK7 using enum:
public class StringSwitchDemo {
public enum Day
{
    SUNDAY, MONDAY, TUESDAY, WEDNESDAY, 
    THURSDAY, FRIDAY, SATURDAY; 
}        

public static void main(String[] args) {

 String str = "SUNDAY";
switch (Day.valueOf(str))
{
    case SATURDAY:              
    case SUNDAY:
        System.out.println("Sunday");
        // weekend processing ...
        break;
    default:
        // weekday processing ...
        System.out.println("default");
        break;
}
}
}

Output: Sunday

Example of String in Switch in JDK7
JDK 7 has made an important enhancement in there support of String, now you can use String in switch and case statement


public static void tradingOptionChooser(String trading) {
 switch (trading) {
  case "Stock Trading":
       System.out.println("Trader has selected Stock Trading option");
       break;
  case "Electronic Trading":
       System.out.println("Trader has selected Electronic Trading option");
       break;
  case "Algorithmic Trading":
       System.out.println("Trader has selected Algorithmic Trading option");
       break;
  case "Foreign exchange trading":
       System.out.println("Trader has selected Foreign exchange Trading option");
       break;
  case "commodity trading":
       System.out.println("Trader has selected commodity trading option");
       break;
 default:
       throw new IllegalArgumentException();
 }
}

Try executing above code in below link:
http://www.compileonline.com/compile_java_online.php