Java Array Empty Check isEmpty(Object[] array)

Description

Return whether the given array is empty: that is, null or of zero length.

License

Apache License

Parameter

Parameter	Description
array	the array to check

Return

whether the given array is empty

Declaration

public static boolean isEmpty(Object[] array) 

Method Source Code

//package com.java2s;
/*/*from   w  w w .  ja v a  2 s.  c  o m*/
 * Copyright 2010-2012 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.
 */

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

public class Main {
    public final static String STRING_NULL = null;

    /**
     * if String is null or empty string will return true othterwise return false
     * 
     * @param str
     * @return
     */
    public final static boolean isEmpty(String str) {
        return ((str == STRING_NULL) || ("".equals(str)));
    }

    /**
     * Return whether the given array is empty: that is, <code>null</code>
     * or of zero length.
     * @param array the array to check
     * @return whether the given array is empty
     */
    public static boolean isEmpty(Object[] array) {
        return (array == null || array.length == 0);
    }

    /**
     * Return <code>true</code> if the supplied Collection is <code>null</code>
     * or empty. Otherwise, return <code>false</code>.
     * @param collection the Collection to check
     * @return whether the given Collection is empty
     */
    public static boolean isEmpty(Collection collection) {
        return (collection == null || collection.isEmpty());
    }

    /**
     * Return <code>true</code> if the supplied Map is <code>null</code>
     * or empty. Otherwise, return <code>false</code>.
     * @param map the Map to check
     * @return whether the given Map is empty
     */
    public static boolean isEmpty(Map map) {
        return (map == null || map.isEmpty());
    }
}

Related

1. isEmpty(Object[] array)
2. isEmpty(Object[] array)
3. isEmpty(Object[] array)
4. isEmpty(Object[] array)
5. isEmpty(Object[] array)
6. isEmpty(Object[] array)
7. isEmpty(Object[] array)
8. isEmpty(Object[] array)
9. isEmpty(Object[] array)