Homie.java

import java.util.*;

public class Homie<K, V> {
    public Homie() {
        this.backend = new HashMap<>();
    }

    public void insertValue(K key, V value) {
        this.backend.put(key, value);
    }

    public V selectValue(K key) {
        return this.backend.get(key);
    }

    private HashMap<K, V> backend;
}