java多线程学习

有个题目：有三个线程ID分别是A、B、C,请有多线编程实现，在屏幕上循环打印10次ABCABC…

 

 

 

线程同步有两种基本方法：

（1）    synchronized

（2）    wait,notify,notifyAll

 

借鉴了别人思路后,总结如下:

 

 

 

 

 

方法一:

package com; public class ThreadABC { private static final int count = 10;//次数 private static String[] keyArray = {"a", "b", "c"};//顺序 /** * @param args */ public static void main(String[] args) { String[] lock = {"a"}; //起始 Thread th = null; for (int i = 0; i < keyArray.length; i++) { th = new ThreadA(keyArray[i], lock); th.start(); } } public static class ThreadA extends Thread { private String name; private String[] lock; public ThreadA(String str, String[] lock) { this.name = str; this.lock = lock; } @Override public void run() { int num = 1; while (num < count) { synchronized (lock) { while (!name.equalsIgnoreCase(lock[0])) { try { lock.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } System.out.println(lock[0]); num++; for (int i = 0; i < keyArray.length; i++) { if (name.equalsIgnoreCase(keyArray[i])) { lock[0] = keyArray[(i + 1) % keyArray.length]; break; } } lock.notifyAll(); } } } } }