Java Collection Empty isEmpty(Collection c)

Description

Check whether collection c is empty.

License

Apache License

Declaration

public static boolean isEmpty(Collection c) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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./*from  ww w.  ja  v a2s  . c om*/
 *******************************************************************************/

import java.util.Collection;
import java.util.Map;

public class Main {
    public static boolean isEmpty(Object value) {
        if (value == null)
            return true;

        if (value instanceof String) {
            if (((String) value).length() == 0) {
                return true;
            }
        } else if (value instanceof Collection) {
            if (((Collection) value).size() == 0) {
                return true;
            }
        } else if (value instanceof Map) {
            if (((Map) value).size() == 0) {
                return true;
            }
        }
        return false;
    }

    /** Check whether string s is empty. */
    public static boolean isEmpty(String s) {
        return ((s == null) || (s.length() == 0));
    }

    /** Check whether collection c is empty. */
    public static boolean isEmpty(Collection c) {
        return ((c == null) || (c.size() == 0));
    }
}

Related

1. isCollectionEmpty(Collection collection)
2. isCollectionEmpty(Collection oneCol)
3. isCollectionEmpty(Collection value)
4. isCollectionNotEmpty(Collection collection)
5. isCollectionNullOrEmpty(Collection collection)
6. isEmpty(Collection c)
7. isEmpty(Collection c)
8. isEmpty(Collection c)
9. isEmpty(Collection c)