Java tutorial
//package com.java2s; /* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { /** * Tests two objects for {@link Object#equals(Object)} equality, handling the case where one or * both may be null. * * @param o1 The first object. * @param o2 The second object. * @return {@code o1 == null ? o2 == null : o1.equals(o2)}. */ public static boolean areEqual(Object o1, Object o2) { return o1 == null ? o2 == null : o1.equals(o2); } }