Question

What output will be generated by running the program below? Make sure to understand step by step what’s happening in computer’s memory and illustrate these steps. You don’t necessarily need to draw formal diagrams. Any notation or diagrams that can be used to show memory allocation and value changes should suffice.

class B {

private int value;

public B () {

} value = 3;

public int getD() {

} return 2 * value;

public void setV(int v) {

value = v + value;

}

public static void main(String[] args) {

int value = 3;

B mymy = new B();

mymy.setV(value);

System.out.println(value + mymy.getD());

} }

Answer 1

B mymy = new B(); creates a new object of class B whose value is 3.

Now, mymy.setV(value); results in mymy's value = mymy.value + value = 3 + 3 = 6

Hence, mymy's value = 6

Now,

mymy.getD() returns 2 * mymy.value = 2 * 6 = 12

Hence, System.out.println(value + mymy.getD()); prints 3 + 12 = 15