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java多线程系列2-线程控制
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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();
}
}
}
