When executing System. out. println (a2), the toString () method in the Object class is invoked. The program cannot be compiled, because System. out. println (a1) is wrong and it should be replaced by System. out. println (a1. toString ()); When executing System. out. println (a1), the toString () method in the Object class is invoked. When executing System. out. println (a1), the toString () method in the A class is invoked. True or false?

in the code snippet below, c. When System. out. println (a2) is executing, the toString () method is called.

d. When System. out. println (a1) is executing, the toString () method in class A gets called.

Explanation:

public class Test{

public static void main (String[] args) {

Object a1 = new A ();

Object a2 = new Object ();

System. out. println (a1);

System. out. println (a2);

}

}

class A{

int x;

@Override

public String toString () {

return "A's x is " + x;

}

}