1、Thread类构造方法：1.Thread（）；2.Thread（String name）；3.Thread（Runable r）；4.Thread（Runable r, String name）；
3、isAlive();//判断线程是否活动isDaemon();//判断是否守护线程getState();//获得线程状态sleep(long mill);//休眠线程join();//等待线程结束yield();//放弃cpu使用权利interrupt();//中断线程currentThread();//获得正在执行的线程对象
4、下面实例用join()实现线程按顺序执行：/*有三个线程T1 T2 T3，如何保证他们按顺序执行-转载在T2的run中，调用t1.join，让t1执行完成后再让T2执行在T2的run中，调用t2.join，让t2执行完成后再让T3执行*/public class ThreadByOrder { static Thread t1 = new Thread(new Runnable() { @Override public void run() { System.out.println("t1"); } }); static Thread t2 = new Thread(new Runnable() { @Override public void run() { try { t1.join(); Thread.sleep(500); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("t2"); } }); static Thread t3 = new Thread(new Runnable() { @Override public void run() { try { t2.join(); Thread.sleep(500); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("t3"); } }); public static void main(String[] args) { t1.start(); t2.start(); t3.start(); } }
