?? boundedqueue.java
字號:
/* * Copyright (C) 2000-2001 Ken McCrary * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Email: jkmccrary@yahoo.com */package com.kenmccrary.jtella.util;import java.util.LinkedList;/** * A Queue supporting standard enqueue/dequeue operations * with a maximum permitted size. Having a maximum size * guards against unrestricted memory usage * */public class BoundedQueue extends java.lang.Object { private int maxSize; private LinkedList queue; /** * Constructs a <code>BoundedQueue</code> with a max size * * @param max size for queue */ public BoundedQueue(int maxSize) { this.maxSize = maxSize; queue = new LinkedList(); } /** * Enqueue an object * * @return true if enqueue worked, false if queue is full */ public synchronized boolean enqueue(Object o) { if ( queue.size() > maxSize ) { return false; } queue.add(o); return true; } /** * Removes an object from the queue * */ public synchronized Object dequeue() { return queue.remove(0); } /** * Check if the queue is empty * * @retur true if empty, false otherwise */ public synchronized boolean empty() { return queue.size() == 0; } }
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -