package utils; public class Pair<T, U> { private T a; private U b; public Pair() { } public Pair(T a, U b) { this.a = a; this.b = b; } public void setA(T a) { this.a = a; } public T getA() { return a; } public void setB(U b) { this.b = b; } public U getB() { return b; } }