com.ibm.icu.impl.Pair Maven / Gradle / Ivy
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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2014, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
package com.ibm.icu.impl;
/**
* A pair of objects: first and second.
*
* @param first object type
* @param second object type
*/
public class Pair {
public final F first;
public final S second;
protected Pair(F first, S second) {
this.first = first;
this.second = second;
}
/**
* Creates a pair object
* @param first must be non-null
* @param second must be non-null
* @return The pair object.
*/
public static Pair of(F first, S second) {
if (first == null || second == null) {
throw new IllegalArgumentException("Pair.of requires non null values.");
}
return new Pair(first, second);
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
}
if (!(other instanceof Pair)) {
return false;
}
Pair rhs = (Pair) other;
return first.equals(rhs.first) && second.equals(rhs.second);
}
@Override
public int hashCode() {
return first.hashCode() * 37 + second.hashCode();
}
}