import java.util.HashMap;

public class AAA {

    public static void main(String[] args) {
        HashMap<Integer, String> map = new HashMap<Integer, String>();
        String str = "1";
        map.put(1, str);
        System.out.println(map.get(1));

        str = "2";
        System.out.println(map.get(1));
    }

}