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该文转自：写两个线程，一个线程打印1-52，另一个线程打印字母A-Z。打印 顺序为12A34B56C……5152Z_chengfn_新浪博客

package com.home.thread;public class TestThread {public static void main(String[] args) throws Exception {Object obj = new Object();// 启动两个线程Thread1 t1 = new Thread1(obj);Thread2 t2 = new Thread2(obj);t1.start();t2.start();}
}// 一个线程打印1-52
class Thread1 extends Thread {private Object obj;public Thread1(Object obj) {this.obj = obj;}public void run() {synchronized (obj) {// 打印1-52for (int i = 1; i < 53; i++) {System.out.print(i + " ");if (i % 2 == 0) {// 不能忘了 唤醒其它线程obj.notifyAll();try {obj.wait();} catch (InterruptedException e) {e.printStackTrace();}}}}}
}// 另一个线程打印字母A-Z
class Thread2 extends Thread {private Object obj;public Thread2(Object obj) {this.obj = obj;}public void run() {synchronized (obj) {// 打印A-Zfor (int i = 0; i < 26; i++) {System.out.print((char) ('A' + i) + " ");// 不能忘了 唤醒其它线程obj.notifyAll();try {// 最后一个就不要等了if (i != 25) {obj.wait();}} catch (InterruptedException e) {e.printStackTrace();}}}}}