Here you can find the source of clearCollection(Collection collection)
public static void clearCollection(Collection collection)
//package com.java2s; /*/*from ww w . j av a 2 s .c om*/ * Copyright 2012-2014 Dan Cioca * * 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; public class Main { public static void clearCollection(Collection collection) { if (collection != null) { collection.clear(); } } }