pair

public class Pair<K,V>{
	private K key;
	private V value;
	public Pair(K key,V value){
		this.key=key;
		this.value=value;
	}
	public K getkey(){
		return this.key;
	}
	public V getvalue(){
		return this.value;
	}
	public static void main(String[] args){
		Pair<Integer,String> p1=new Pair<>(123,"qaz");
		System.out.println(p1.getkey()+" "+p1.getvalue());
		
		Pair<String,String> p2=new Pair<>("abc","qaz");
		System.out.println(p2.getkey()+" "+p2.getvalue());
	}
}