betterprinter.java

来自「疯狂Java讲义_源码(含Java设计模式CHM」· Java 代码 · 共 40 行

import lee.Output;
/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class BetterPrinter implements Output
{
	private String[] printData = new String[MAX_CACHE_LINE * 2];
	//用以记录当前需打印的作业数
	private int dataNum = 0;
	public void out()
	{
		//只要还有作业，继续打印
		while(dataNum > 0)
		{
			System.out.println("高速打印机正在打印：" + printData[0]);
			//把作业队列整体前移一位，并将剩下的作业数减1
			System.arraycopy(printData , 1, printData, 0, --dataNum);
		}
	}
	public void getData(String msg)
	{
		if (dataNum >= MAX_CACHE_LINE * 2)
		{
			System.out.println("输出队列已满，添加失败");
		}
		else
		{
			//把打印数据添加到队列里，已保存数据的数量加1。
			printData[dataNum++] = msg;
		}
	}
}