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Discussion :: Objects and Collections

  1. What will be the output of the program?

    
 package foo; 
 import java.util.Vector; /* Line 2 */
 private class MyVector extends Vector  
 {   
     int i = 1; /* Line 5 */    
     public MyVector()    
     {          
        i = 2;   
    }   
     public class MyNewVector extends MyVector  
   {
     public MyNewVector ()      
     {         
        i = 4; /* Line 15 */     
     }
     public static void main (String args [])     
     {        
          MyVector v = new MyNewVector(); /* Line 19 */     
     }
   
   }

    2. A.

    Compilation will succeed.
    B.

    Compilation will fail at line 3.
    C.

    Compilation will fail at line 5.
    D.

    Compilation will fail at line 15.

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    Answer : Option B

    Explanation :

    Option B is correct. The compiler complains with the error "modifier private not allowed here". The class is created private and is being used by another class on line 19.

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