java 核心编程——线程之线程控制（五）

线程之线程控制（五）"/>

java 核心编程——线程之线程控制（五）

1.线程运行状态图

2.线程的启动（start）和停止(stop)

package se.thread;import java.util.Date;public class ThreadController1 extends Thread {int count = 0;@Overridepublic void run() {while(true){System.out.println(count+++":"+new Date());try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}public static void main(String[] args) {ThreadController1 threadController1 = new ThreadController1();threadController1.start();//主线程休息4秒后关闭子线程try {Thread.sleep(4000);threadController1.stop();} catch (InterruptedException e) {e.printStackTrace();}}}

3.线程的休眠和挂起

　　yield（）方法和sleep（）方法的区别；

　　相同点：都能使线程阻塞挂起

       不同点：1.yield不能设置阻塞时间  2：yield只能使相同优先级的线程有机会运行。

package se.thread;public class ThreadSleep  extends  Thread{@Overridepublic void run() {for (int i = 0; i < 10 ; i++) {if(i == 5 && Thread.currentThread().getName().equals("test1")){Thread.yield();}System.out.println(Thread.currentThread().getName()+":"+i);}}public static void main(String[] args) {ThreadSleep threadSleep1 = new ThreadSleep();ThreadSleep threadSleep2 = new ThreadSleep();Thread test1 = new Thread(threadSleep1,"test1");Thread test2 = new Thread(threadSleep2,"test2");test1.start();test2.start();}}

4.线程的同步synchronized

　　线程执行过程中必须考虑与其他线程之间共享数据或者协调状态。

package se.thread;public class ThreadSync extends  Thread {@Overridepublic void run() {synchronized (this) {for (int i = 0; i < 10; i++) {System.out.println(Thread.currentThread().getName() + ":" + i);}}}public static void main(String[] args) {ThreadSync threadSync = new ThreadSync();ThreadSync threadSync1 = new ThreadSync();Thread t1 = new Thread(threadSync,"test1");Thread t2 = new Thread(threadSync1,"test2");t1.start();t2.start();}
}

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