Java List Equal equals(List list1, List list2)

Description

equals

License

Apache License

Declaration

public static boolean equals(List list1, List list2) 

Method Source Code

//package com.java2s;
/**/*w w w  .j  ava 2 s  .  com*/
 * 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;
    }
}

Related

1. equalLists(List one, List two)
2. equalLists(List a, List b)
3. equals(final List fromList, final List key, final int start)
4. equals(List A, List B)
5. equals(List c1, List c2)
6. equals(List lst1, List lst2)
7. equals(List l1, List l2)
8. equals(List list, Object o)
9. equals(List l1, List l2, boolean ignoreCase)