java例程练习（多线程[线程的优先级等等]）

//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);
}
}
}