Operators and Assignments - Java Programming Questions and Answers

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Discussion :: Operators and Assignments

What will be the output of the program?

class PassA
 {         
     public static void main(String [] args) 
     {                                   
       passA p = new PassA();            
       p.start();              
     }  
     void start()
     {      
       long [] a1 = {3,4,5}; 
       long [] a2 = fix(a1);  
       System.out.print(a1[0] + a1[1] + a1[2] + " ");
       System.out.println(a2[0] + a2[1] + a2[2]);
     }   
     long [] fix(long [] a3)   
     {
        a3[1] = 7;     
        return a3;     
     }
 }

12 15

15 15

3 4 5 3 7 5

3 7 5 3 7 5

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Answer : Option B

Explanation :

Output: 15 15

The reference variables a1 and a3 refer to the same long array object. When the [1] element is updated in the fix() method, it is updating the array referred to by a1. The reference variable a2 refers to the same array object.