多个线程实现顺序打印数据，（可自定义线程一次打印数量和总数量）

package com.cky;

import java.util.LinkedHashMap;
import java.util.Map;

public class PrintQueue {
    public int targetNum=0;    //要打印的目标数量
    public int printOnce=0;    //一次要打印的次数
    private int nowNum=1;        //目前打印到的数量
    /**
     * 
     * @param targetNum    要打印的目标数量
     * @param printOnce 一次要打印的次数
     */
    public PrintQueue(int targetNum, int printOnce) {
        super();
        this.targetNum = targetNum;
        this.printOnce = printOnce;
    }

    private int nextThreadNum=0;//下次要执行线程的下标
    private int threadCount=0;//总的线程数量
    
    //map集合，存放线程，键是具体线程，值存放线程打印的顺序
    private Map<Thread,Integer> threads=new LinkedHashMap<Thread,Integer>();
    
    //添加线程
    public void setThread(Thread thread) {
        threads.put(thread, threadCount);
        threadCount++;
    }
    //运行线程
    public void run() {
        for (Thread thread : threads.keySet()) {
            thread.start();
        }
    }
    
    public synchronized void printNum() throws InterruptedException {
        //获取当前线程
        Thread currentThread=Thread.currentThread();
        //获取当前线程坐标
        int currentNum=threads.get(currentThread);
        //判断是否为期望线程
        if(currentNum==nextThreadNum) {
            for(int i=0;i<printOnce;i++) {
                System.out.println("当前线程："+currentThread.getName()+":"+nowNum++);
                if(nowNum>targetNum) {
                    System.out.println("工作完成");
                    this.wait();
                }
            }
            //期望线程名+1
            nextThreadNum=(++nextThreadNum)%threadCount;
        }
    }
    
}

package com.cky;

class RunTest implements Runnable{
    PrintQueue ps;
    public RunTest(PrintQueue ps ) {
        this.ps=ps;
    }
    @Override
    public void run() {
        try {
            while(true) {
                ps.printNum();
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

package com.cky;

public class ThreadDemo {
    public static void main(String [] args) {
        //设置一共打印20个，每个线程一次只打印3个
　　　　　PrintQueue ps=new PrintQueue(20, 3);
　　　　　//添加线程
        ps.setThread(new Thread(new RunTest(ps),"王大锤"));
        ps.setThread(new Thread(new RunTest(ps),"张全蛋"));
        ps.setThread(new Thread(new RunTest(ps),"二狗"));
        ps.run();
    }
}