//设置线程的优先级 public class TestThread1 { public static void main(String[] args) { Thread t1 = new Thread(new T1()); Thread t2 = new Thread(new T2()); t1.setPriority(Thread.NORM_PRIORITY + 3); t1.start(); t2.start(); } } class T1 implements Runnable { public void run() { for(int i = 0; i < 1000; i++) { System.out.println("--------T1: " + i); } } } class T2 implements Runnable { public void run() { for(int i = 0; i < 1000; i++) { System.out.println("========T2: " + i); } } }//同样的线程对象可以用来起多个线程 public class TestThread2 { public static void main(String[] args) { Runner2 r = new Runner2(); Thread t1 = new Thread(r); Thread t2 = new Thread(r); t1.start(); t2.start(); } } class Runner2 implements Runnable { public void run() { for(int i = 0; i < 30; i++) { System.out.println("NO. " + i); } } }

//sleep()方法 public class TestThread3 { public static void main(String[] args) { Runner3 r = new Runner3(); Thread t = new Thread(r); t.start(); } } class Runner3 implements Runnable { public void run() { for(int i = 0; i < 30; i++) { if(i % 10 == 0 && i != 10) { try { Thread.sleep(1000); } catch(InterruptedException e) {} System.out.println("NO. " + i); } } } }

public class TestThread4 { public static void main(String[] args) { Runner4 r = new Runner4(); Thread t = new Thread(r); t.start(); for(int i = 0; i < 100000; i++) { if(i % 1000 == 0 & i > 0) { System.out.println("In Thread main i = " + i); } } System.out.println("Thread Main is Over"); r.shutDown(); } } class Runner4 implements Runnable { private boolean flag = true;//最好的使线程终止的方法 public void run() { int i = 0; while(flag == true) { System.out.print(" " + i++); } } public void shutDown() { flag = false; } }

//复习join()方法； public class TestThread5 { public static void main(String[] args) { Runner5 r = new Runner5(); Thread t = new Thread(r); t.start(); try { t.join(); } catch(InterruptedException e) {} for(int i = 0; i < 50; i ++) { System.out.println("MainThread: " + i); } } } class Runner5 implements Runnable { public void run() { for(int i = 0; i < 50; i++) { System.out.println("SubThread: " + i); } } }

public class TestThread6 { public static void main(String[] args) { Thread t = new Runner6(); t.start(); for(int i = 0; i < 50; i++) { System.out.println("MainThread: " + i); } } } class Runner6 extends Thread { public void run() { //拿到当前线程判断是不是还活着Thread.currentThread(),isAlive() System.out.println(Thread.currentThread().isAlive()); for(int i = 0; i < 50; i++) { System.out.println("SubThread: " + i); } } }