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Discussion :: Operators and Assignments

  1. What will be the output of the program (when you run with the -ea option) ?

    public class Test  {  
   public static void main(String[] args)      
   {         
      int x = 0;           
      assert (x > 0) : "assertion failed"; /* Line 6 */
      System.out.println("finished");      
   }
}

    2. A.

    finished
    B.

    Compilation fails.
    C.

    An AssertionError is thrown.
    D.

    An AssertionError is thrown and finished is output.

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    Answer : Option C

    Explanation :

    An assertion Error is thrown as normal giving the output "assertion failed". The word "finished" is not printed (ensure you run with the -ea option)

    Assertion failures are generally labeled in the stack trace with the file and line number from which they were thrown, and also in this case with the error's detail message "assertion failed". The detail message is supplied by the assert statement in line 6.

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