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);
		}
	}
}