l2p3 java

//interface Pair

public interface Pair<K, V> {
    public K getKey();
    public V getValue();

}
//class OrderPair


public class OrderPair<K, V> implements Pair<K, V> {
    private K key;
    private V value;

    //Constructor generic
    public OrderPair(K key, V value) {

    this.key = key;
    this.value = value;

    }

    public K getKey() { return key; }
    public V getValue() { return value; }

    // Generic methods
    public void setKey(K key) { this.key = key; }
    public void setValue(V value) { this.value = value; }


}

//class Util


public class Util {
    // Generic static method
    public static <K, V> boolean compare(OrderPair<K, V> p1, OrderPair<K, V> p2)
    {
        return p1.getKey().equals(p2.getKey()) && p1.getValue().equals(p2.getValue());
    }

    public static void main(String[] args)
    {
        OrderPair<String, Integer> p1 = new OrderPair<String, Integer>("Even ", 8);
        OrderPair<String, String> p2 = new OrderPair<String, String>("hello", " world");


        //boolean same = Util.<Integer, String>compare(p1, p2);

        //sau:

        //boolean same = Util.compare(p1, p2);



        System.out.println(p1.getKey()+p1.getValue());
        System.out.println(p2.getKey()+p2.getValue());
    }


    }