Here you can find the source of isEmpty(Object[] arr)
true
if arr
is null
or has length 0.
Parameter | Description |
---|---|
arr | the array |
true
if empty and false
otherwise
public static boolean isEmpty(Object[] arr)
//package com.java2s; /*/* w ww .ja v a 2s .c o m*/ * Copyright (c) 2013 Game Salutes. * All rights reserved. This program and the accompanying materials * are made available under the terms of the GNU Lesser Public License v3 * which accompanies this distribution, and is available at * http://www.gnu.org/licenses/lgpl.html * * Contributors: * Game Salutes - Repackaging and modifications of original work under University of Chicago and Apache License 2.0 shown below * * Repackaging from edu.uchicago.nsit.iteco.utils to com.gamesalutes.utils * * Copyright 2008 - 2011 University of Chicago * * 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 { /** * Returns <code>true</code> if <code>value</code> is <code>null</code> or * its trimmed length is zero. * * @param value the <code>String</code> * @return <code>true</code> if empty and <code>false</code> otherwise */ // RETAINED FOR COMPATABILITY public static boolean isEmpty(String value) { return isEmpty((CharSequence) value); } /** * Returns <code>true</code> if <code>value</code> is <code>null</code> or * its trimmed length is zero. * * @param value the <code>String</code> * @return <code>true</code> if empty and <code>false</code> otherwise */ public static boolean isEmpty(CharSequence value) { if (value == null) return true; for (int i = 0, len = value.length(); i < len; ++i) if (value.charAt(i) > ' ') return false; return true; } /** * Returns <code>true</code> if <code>collection</code> is <code>null</code> * or empty. * * @param collection the <code>Collection</code> * @return <code>true</code> if empty and <code>false</code> otherwise */ public static boolean isEmpty(Collection<?> collection) { return collection == null || collection.isEmpty(); } /** * Returns <code>true</code> if <code>m</code> is <code>null</code> or * empty. * * @param m the <code>Map</code> * @return <code>true</code> if empty and <code>false</code> otherwise */ public static boolean isEmpty(Map<?, ?> m) { return m == null || m.isEmpty(); } /** * Returns <code>true</code> if <code>arr</code> is <code>null</code> or * has length 0. * * @param arr the array * @return <code>true</code> if empty and <code>false</code> otherwise */ public static boolean isEmpty(Object[] arr) { return arr == null || arr.length == 0; } }