Java线程同步和线程间通信代码和控制线程关闭

class Producer implements Runnable {
	Q q;// 定义队列
	
	public Producer(Q q) {
		this.q = q;
	}

	public void run() {
		int i = 0;
		while (true) {
			synchronized (q) {
				if (q.bFull)
					try {q.wait();} catch (Exception e) {}
				if (i == 0) {
					q.name = "zhangsan";
					try {Thread.sleep(1);} catch (Exception e) {}
					q.sex = "nan";
				}

				else {
					q.name = "lisi";
					q.sex = "nv";
				}
				i = (i + 1) % 2;
				q.bFull = true;
				q.notify();
			}
		}
	}
}

class Consumer implements Runnable {
	Q q;

	public Consumer(Q q) {
		this.q = q;
	}

	public void run() {
		while (true) {
			synchronized (q) {
				if (!q.bFull)
					try {q.wait();} catch (Exception e) {}
				System.out.print(q.name);
				System.out.println(":" + q.sex);
				q.bFull = false;
				q.notify();
			}
		}
	}
}

class Q {
	String name = "unknown";
	String sex = "unknown";
	Boolean bFull = false;
}

public class test {
	public static void main(String[] args) {
		Q q = new Q();
		new Thread(new Producer(q)).start();
		new Thread(new Consumer(q)).start();
	}
}

可以简写为：简单且具有面向对象的思想

class Producer implements Runnable {
	Q q;// 定义队列

	public Producer(Q q) {
		this.q = q;
	}

	public void run() {
		int i = 0;
		while (true) {
			if (i == 0)
				q.set("name1", "M");
			else
				q.set("name2", "F");
			i = (i + 1) % 2;
		}
	}
}

class Consumer implements Runnable {
	Q q;

	public Consumer(Q q) {
		this.q = q;
	}

	public void run() {
		while (true) {
			q.get();
		}

	}
}

class Q {
	private String name = "unknown";
	private String sex = "unknown";
	Boolean bFull = false;

	public synchronized void set(String name, String sex) {
		if (bFull)
			try {wait();} catch (Exception e) {}
		this.name = name;
		try {
			Thread.sleep(1);
		} catch (Exception e) {
		}
		this.sex = sex;
		bFull = true;
		notify();
	}

	public synchronized void get() {
		if (!bFull)
			try {wait();} catch (Exception e) {}
		System.out.print(name);
		System.out.println(":" + sex);
		bFull = false;
		notify();
	}
}

public class test {
	public static void main(String[] args) {
		Q q = new Q();
		new Thread(new Producer(q)).start();
		new Thread(new Consumer(q)).start();
	}
}

控制线程关闭，不能采用stop()/suspendI()方法，会产生死锁问题

public class test {
	public static void main(String[] args) {
		ThreadTest t = new ThreadTest();
		new Thread(t).start();
		for (int i = 0; i < 10; i++) {
			if (i == 5) {
				t.stopM();
			}
			System.out.println("Main() is running");
		}
	}
}

class ThreadTest implements Runnable {
	private Boolean bStop = false;

	public void stopM() {
		bStop = true;
	}

	public void run() {                                
		while (!bStop) {                                 //将run的代码块放到判断条件语句中
			System.out.println(Thread.currentThread().getName() + "is running");

		}
	}
}