Thread 初探_JAVA_编程开发_程序员俱乐部

???? 对线程了解不多，且不经常去用，最近想起，小小了解，且做个小demon和大家分享一下。

demon：两个线程，分别交替打印20次后中断。

????? package com.cn.ld.exercises;

import java.util.concurrent.atomic.AtomicInteger;

/**
?* @author Administrator
?* Exercise
?* 2011-9-22 下午04:55:55?
?* Description:
?*/
public class Test {
?private static AtomicInteger s_count = new AtomicInteger(0);
?private static boolean stop ;
?private static int n = 0 ;
?private static int n1 = 0;
?private static int n2 = 0;
?public Test(boolean stop){
??this.stop = stop ;
?}
?public class thread1 implements Runnable {
??public? boolean stop= false ;
??????? public thread1(boolean? stop){
??????? ?this.stop = stop ;
??????? }
??????? public boolean? getStop(){
??????? ?return stop ;
??????? }
??public void run() {
???synchronized (s_count) {
????
????while (!stop) {
?????if(n2==21&&n1==21){
??????try {
???????Thread.sleep(10000);
???????stop = true ;
???????Thread.interrupted();
??????} catch (InterruptedException e) {
???????// TODO Auto-generated catch block
???????e.printStackTrace();
??????}
?????}
?????if (n % 2 != 0) {
??????? System.out.println(Thread.currentThread().getName()
????????+ ":运行了" + n1 + "次！");
??????n++ ;
??????n1++;
??????s_count.notify();
?????} else {
??????try {
???????s_count.wait();
??????} catch (InterruptedException e) {
???????// TODO Auto-generated catch block
???????e.printStackTrace();
??????}
?????}
????}
???}
??}

?}

?public class thread2 implements Runnable {
??public? boolean stop= false ;
??????? public thread2(boolean? stop){
??????? ?this.stop = stop ;
??????? }
??????? public boolean? getStop(){
??????? ?return stop ;
??????? }
??public void run() {
???synchronized (s_count) {
????
????while (!stop) {
?????if(n2==21&&n1==21){
??????try {
???????Thread.sleep(10000);
???????stop = true ;
???????Thread.interrupted();
??????} catch (InterruptedException e) {
???????// TODO Auto-generated catch block
???????e.printStackTrace();
??????}
??????
?????}
?????if (n % 2 == 0) {
??????System.out.println(Thread.currentThread().getName()
?????????+ ":运行了" + n2 + "次！");
??????n++;
??????n2++;
??????s_count.notify();
?????} else {
??????try {
???????s_count.wait();
??????} catch (InterruptedException e) {
???????// TODO Auto-generated catch block
???????e.printStackTrace();
??????}
?????}
????}
???}
??}

?}

?public static void main(String[] args) throws InterruptedException {
??Test test = new Test(false);
??Thread t1 = new Thread(test.new thread1(test.stop));
??Thread t2 = new Thread(test.new thread2(test.stop));
???? t1.start();
???? t2.start();
?}
}

?

写的很丑陋，还请见谅，大家尽可怕转