Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright 2010 JBoss Inc
 *
 * 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.
 */

import java.util.List;

public class Main {
    public static boolean equals(List list1, List list2) {
        if (list1 == null && list2 == null) {
            // both are null
            return true;
        }

        if (list1 == null || list2 == null) {
            // we know both aren't null, so if one is null them obviously false
            return false;
        }

        if (list1.size() != list2.size()) {
            return false;
        }

        if (list1.isEmpty() && list2.isEmpty()) {
            return true;
        }

        for (Object item1 : list1) {
            boolean exists = false;
            for (Object item2 : list2) {
                if (item1.equals(item2)) {
                    exists = true;
                    break;
                }
            }
            if (!exists) {
                return false;
            }
        }

        return true;
    }
}