多线程顺序打印多线程顺序打印

前言：
下面的代码是参考网址：http://love3400wind.blog.163.com/blog/static/796308012013117102941831/ , http://blog.csdn.net/liu251/article/details/6227763 做了一点点的改动。
感谢两位作者！
题目：
有A,B,C三个线程, A线程输出A, B线程输出B, C线程输出C
要求, 同时启动三个线程, 按顺序输出ABC, 循环10次

核心要素：
1，工作线程对象之间的关联。
2，工作线程的状态修改(前一个线程对象有能力修改后一个线程对象的状态)。

示例：

package org.wit.ff.thread; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; /** * * @author F.Fang * */ public class ABCDemo {private Lock lock = new ReentrantLock(); // 通过JDK5中的锁来保证线程的访问的互斥 private Condition condition = lock.newCondition(); // 线程协作public static void main(String[] args) { ABCDemo abc = new ABCDemo(); // 使用循环可以不局限于只有3个线程交替, 任意多个都可以. PrintThread a = abc.new PrintThread("A", true); PrintThread b = abc.new PrintThread("B", false); PrintThread c = abc.new PrintThread("C", false); a.setNext(b); b.setNext(c); c.setNext(a); ExecutorService executor = Executors.newFixedThreadPool(3); // 通过线程池执行 for (int i = 0; i < 3; i++) { executor.execute(a); executor.execute(b); executor.execute(c); } executor.shutdown(); //关闭线程池 }class PrintThread implements Runnable { private String name; private PrintThread next; private boolean execute; public PrintThread(String name, boolean execute) { this.name = name; this.execute = execute; }public PrintThread(String name, PrintThread next, boolean execute) { this.name = name; this.next = next; this.execute = execute; }public void run() { lock.lock(); try { while (true) {if (execute) { // 执行当前业务 print(); // 当前任务执行完成后改变执行状态为false execute = false; // 将下一个相邻任务状态设置为true next.setExecute(true); try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } // 通知其它任务. condition.signalAll(); break; } else { try { // 若非执行状态即等待. condition.await(); } catch (InterruptedException e) { e.printStackTrace(); } } } } finally { lock.unlock(); } }public void print() { System.out.println(name); }public void setExecute(boolean execute) { this.execute = execute; }public void setNext(PrintThread next) { this.next = next; }}}

【多线程顺序打印】转载于:https://www.cnblogs.com/fangfan/p/3957665.html