public class Pair<K, V> {
    private K key;
    private V val;
    
    public Pair(K key, V val) {
        this.key = key;
        this.val = val;
    }
    
    public K getKey() {
        return this.key;
    }
    
    public V getVal() {
        return this.val;
    }
    
    public static void main(String[] args) {
        Pair<Integer, String> p1 = new Pair<>(123, "abc");
        Integer i = p1.getKey();
        System.out.println(i);
        System.out.println(p1.getVal());
    }
}