检查给定的迭代器是否包含给定的元素。
/* * Copyright 2002-2015 the original author or authors. * * 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. */ //package com.nowjava; import java.util.*; /** from nowjava - 时代Java**/ public class Main { public static void main(String[] argv) { Iterator iterator = java.util.Arrays.asList("asdf", "nowjava.com") .iterator(); Object element = "nowjava.com"; System.out.println(contains(iterator, element)); } /*来自 NowJava.com*/ /** * Check whether the given Iterator contains the given element. * * @param iterator the Iterator to check * @param element the element to look for * @return {@code true} if found, {@code false} else */ public static boolean contains(Iterator<?> iterator, Object element) { if (iterator != null) { while (iterator.hasNext()) { Object candidate = iterator.next(); if (org.springframework.util.ObjectUtils.nullSafeEquals( candidate, element)) { return true; } } } return false; } /** * Check whether the given Enumeration contains the given element. * * @param enumeration the Enumeration to check * @param element the element to look for * @return {@code true} if found, {@code false} else */ public static boolean contains(Enumeration<?> enumeration, Object element) {