what will be the output of the following java code?

Problem statement:
what will be the output of the following code?

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;

1. public class Solutions {
2.     public static void main(String[] args) {
3.         HashMap<Integer, String> m = new HashMap<>();
4.         m.put(1001,"A");
5.         m.put(1002,"B");
6.         //Collections.unmodifiableMap(m);
7.         m.put(1001,"C");
8.         System.out.println(m);
9.     }
10. }

Output: {1001=C, 1002=B}