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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 x: System.out.print("0 ");          
                    case x-1: System.out.print("1 ");                
                    case x-2: System.out.print("2 ");          
   
             }       
 
          } 

       }
 
    }

     

    2. A.

    0 1 2
    B.

    0 1 2 1 2 2
    C.

    2 1 0 1 0 0
    D.

    2 1 2 0 1 2

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    Answer : Option D

    Explanation :

    The case expressions are all legal because x is marked final, which means the expressions can be evaluated at compile time. In the first iteration of the for loop case x-2 matches, so 2 is printed. In the second iteration, x-1 is matched so 1 and 2 are printed (remember, once a match is found all remaining statements are executed until a break statement is encountered). In the third iteration, x is matched. So 0 1 and 2 are printed.

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