java.util.map hijacking

utilMap.java

import java.util.*;

public class utilMap {
    public static void showExample(){
        Map<Integer,String> map=new HashMap<Integer,String>();
        map.put(100,"Amit");
        map.put(101,"Vijay");
        map.put(102,"Rahul}\r\n{103 Attacker}\r\n{"); // attacker's controlled value
        System.out.println(map);

    }
}

Output:
{100=Amit, 101=Vijay, 102=Rahul}
{103 Attacker}
{}