/**
 * Generically hold a key, value pair
 * @author gtowell
 * Created: Jul 2021
 */
public class KeyValue<U, V> {
    /** The key */
    private final U key;
    /** the value */ 
    private V value;

    /** 
     * Create a key, value pair
     * @param key   the Key
     * @param value the value
    */
    public KeyValue(U key, V value) {
        this.key = key;
        this.value = value;
    }

    public U getKey() {
        return key;
    }

    public V getValue() {
        return value;
    }
    
    public void setValue(V v) {
        this.value = v;
    }

    @Override
    @SuppressWarnings("unchecked")
    public boolean equals(Object other) {
        if (other instanceof KeyValue<?,?>) {
            return key.equals(((KeyValue<U,V>) other).key);
        } else {
            return super.equals(other);
        }
    }

    @Override
    public String toString() {
        return "<" + key + ", " + value + ">";
    }
    
    public static void main(String[] args) {
        KeyValue<String, Integer> ksvi = new KeyValue<>("key", 1);
        KeyValue<Double, StringBuffer> kdvsb = new KeyValue<>(3.1415, new StringBuffer("Now is the time"));
        System.out.println(ksvi);
        System.out.println(kdvsb);
    }
}