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[Java教程]java多线程系列2

前面的文章已经介绍了有关线程的调度,接下来介绍如何使用方法对线程进行控制

1、线程休眠

public static void sleep(long millis)

/* * 线程休眠 *    public static void sleep(long millis) */public class ThreadSleepDemo {  public static void main(String[] args) {    ThreadSleep ts1 = new ThreadSleep();    ThreadSleep ts2 = new ThreadSleep();    ThreadSleep ts3 = new ThreadSleep();     ts1.setName("zhangsan");    ts2.setName("lisi");    ts3.setName("wangwu");     ts1.start();    ts2.start();    ts3.start();  }} public class ThreadSleep extends Thread {  @Override  public void run() {    for (int x = 0; x < 100; x++) {      System.out.println(getName() + ":" + x + ",日期:" + new Date());      // 睡眠      try {        Thread.sleep(1000);      } catch (InterruptedException e) {        e.printStackTrace();      }    }  }}

2、线程加入

public final void join()

public class ThreadJoin extends Thread {  @Override  public void run() {    for (int x = 0; x < 100; x++) {      System.out.println(getName() + ":" + x);    }  }}/* * public final void join():等待该线程终止。 */public class ThreadJoinDemo {  public static void main(String[] args) {    ThreadJoin tj1 = new ThreadJoin();    ThreadJoin tj2 = new ThreadJoin();    ThreadJoin tj3 = new ThreadJoin();     tj1.setName("zhangsan");    tj2.setName("lisi");    tj3.setName("wangwu");     tj1.start();    try {      tj1.join();    } catch (InterruptedException e) {      e.printStackTrace();    }        tj2.start();    tj3.start();  }}

3、线程礼让

public static void yield()

public class ThreadYield extends Thread {  @Override  public void run() {    for (int x = 0; x < 100; x++) {      System.out.println(getName() + ":" + x);      Thread.yield();    }  }}/* * public static void yield():暂停当前正在执行的线程对象,并执行其他线程。 * 让多个线程的执行更和谐,但是不能靠它保证一个线程一次。 */public class ThreadYieldDemo {  public static void main(String[] args) {    ThreadYield ty1 = new ThreadYield();    ThreadYield ty2 = new ThreadYield();     ty1.setName("zhangsan");    ty2.setName("lisi");     ty1.start();    ty2.start();  }}

4、后台线程

public final void setDaemon(boolean on)

public class ThreadDaemon extends Thread {  @Override  public void run() {    for (int x = 0; x < 100; x++) {      System.out.println(getName() + ":" + x);    }  }} /* * public final void setDaemon(boolean on):将该线程标记为守护线程或用户线程。 * 当正在运行的线程都是守护线程时,Java 虚拟机退出。 该方法必须在启动线程前调用。 * */public class ThreadDaemonDemo {  public static void main(String[] args) {    ThreadDaemon td1 = new ThreadDaemon();    ThreadDaemon td2 = new ThreadDaemon();     td1.setName("zhangsan");    td2.setName("lisi");     // 设置收获线程    td1.setDaemon(true);    td2.setDaemon(true);     td1.start();    td2.start();    Thread.currentThread().setName("wuyudong");    for (int x = 0; x < 5; x++) {      System.out.println(Thread.currentThread().getName() + ":" + x);    }  }}

5、中断线程

public final void stop()

public void interrupt()

import java.util.Date; public class ThreadStop extends Thread {  @Override  public void run() {    System.out.println("开始执行:" + new Date());     // 我要休息10秒钟    try {      Thread.sleep(10000);    } catch (InterruptedException e) {      // e.printStackTrace();      System.out.println("线程被终止了");    }     System.out.println("结束执行:" + new Date());  }}/* * public final void stop():让线程停止,过时了,但是还可以使用。 * public void interrupt():中断线程。 把线程的状态终止,并抛出一个InterruptedException。 */public class ThreadStopDemo {  public static void main(String[] args) {    ThreadStop ts = new ThreadStop();    ts.start();     // 超过三秒不醒过来,就干掉你    try {      Thread.sleep(3000);      // ts.stop();      ts.interrupt();    } catch (InterruptedException e) {      e.printStackTrace();    }  }}