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Discussion :: Flow Control

  1. What will be the output of the program?

     public class Switch2 
 {   
     final static short x = 2;  
     public static int y = 0;  
     public static void main(String [] args)      
     {
         for (int z=0; z 3; z++)    
         {           
            switch (z)              
            {                
            
           
 case y: System.out.print("0 "); /* Line 11 */                   
            
 case x-1: System.out.print("1 "); /* Line 12 */                   
            
 case x: System.out.print("2 ");   /* Line 13 */                
             }       
          }   
       }
    }

     

    2. A.

    0 1 2
    B.

    0 1 2 1 2 2
    C.

    Compilation fails at line 11.
    D.

    Compilation fails at line 12.

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    Answer : Option C

    Explanation :

    Case expressions must be constant expressions. Since x is marked final, lines 12 and 13 are legal; however y is not a final so the compiler will fail at line 11.

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