Java Collection Empty isEmpty(Collection c)

Description

Checks if the given Collection is null or empty.

License

Apache License

Parameter

Parameter	Description
c	the collection to be checked

Return

true if null or empty and false otherwise

Declaration

public static <E> boolean isEmpty(Collection<E> c) 

Method Source Code

//package com.java2s;
/**//from www  .j ava2 s . co m
 * JBoss, Home of Professional Open Source
 * Copyright Red Hat, Inc., and individual contributors.
 *
 * 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.Collection;
import java.util.Map;

public class Main {
    /**
     * Checks if the given {@link Collection} is null or empty.
     * 
     * @param c the collection to be checked
     * @return true if null or empty and false otherwise
     */
    public static <E> boolean isEmpty(Collection<E> c) {
        return c == null || c.isEmpty();
    }

    /**
     * Checks if the given {@link Map} is null or empty.
     * 
     * @param map the map to be checked
     * @return true if null or empty and false otherwise
     */
    public static <K, V> boolean isEmpty(Map<K, V> map) {
        return map == null || map.isEmpty();
    }

    /**
     * Checks if the given {@link String} is null or empty.
     * 
     * @param str the string to be checked
     * @return true if null or empty and false otherwise
     */
    public static boolean isEmpty(String str) {
        return str == null || "".equals(str);
    }
}

Related

1. isEmpty(Collection collection)
2. isEmpty(Collection o)
3. isEmpty(Collection objs)
4. isEmpty(Collection value)
5. isEmpty(Collection values)
6. isEmpty(Collection data)
7. isEmpty(Collection