1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package jdk.test.lib; 25 26 import java.util.Objects; 27 28 /** 29 * Pair - a two element tuple 30 * 31 * @param <F> first type 32 * @param <S> second type 33 */ 34 public class Pair<F, S> { 35 public final F first; 36 public final S second; 37 38 public Pair(F first, S second) { 39 this.first = first; 40 this.second = second; 41 } 42 43 @Override 44 public String toString() { 45 return "(" + first + ":" + second + ")"; 46 } 47 48 @Override 49 public boolean equals(Object other) { 50 if (other instanceof Pair<?, ?>) { 51 Pair<?, ?> otherPair = (Pair<?, ?>) other; 52 return Objects.equals(first, otherPair.first) && 53 Objects.equals(second, otherPair.second); 54 } 55 return false; 56 } 57 58 @Override 59 public int hashCode() { 60 if (first == null) { 61 return (second == null) ? 0 : second.hashCode(); 62 } else if (second == null) { 63 return first.hashCode(); 64 } else { 65 return first.hashCode() * 17 + second.hashCode(); 66 } 67 } 68 }