Refer to the Exhibit.
1. public class A {
2.
3. private int counter = 0;
4.
5. public static int getInstanceCount(){
6. return counter;
7. }
8.
9. public A(){
10. counter++;
11. }
12. }
13.
Given this code from Class B:
A a1 = new A();
A a2 = new A();
A a3 = new A();
System.out.println(A.getInstanceCount());
What is the result?
A.
Compilation of class A fails.
B.
Line 28 prints the value 3 to System.out.
C.
Line 28 prints the value 1 to System.out.
D.
A runtime error occurs when line 25 executes.
E.
Compilation fails because of an error on line 28.
Explanation:
Main.java:6: non-static variable counter cannot be referenced from a static context
return counter;
^
1 error
A