class Res {
	public String name;
	public String sex;
	public Boolean flag = false;
	public Lock lock = new ReentrantLock();
	Condition condition = lock.newCondition();
}

class InputThread extends Thread {

	private Res res;

	public InputThread(Res res) {
		this.res = res;
	}

	@Override
	public void run() {
		int count = 0;
		while (true) {
			try {
				// 開鎖
				res.lock.lock();
				if (res.flag) {
					try {
						// 使執行緒阻塞阻塞
						res.condition.await();
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
				if (count == 0) {
					res.name = "小明";
					res.sex = "男";
				} else {
					res.name = "小紅";
					res.sex = "女";
				}
				count = (count + 1) % 2;
				// 將flag設定為 true 說明已經寫完了
				res.flag = true;
			
			} catch (Exception e) {
				// TODO: handle exception
			} finally {
				// 喚醒執行緒
				res.condition.signal();
				// 解鎖
				res.lock.unlock();
			}
		}
	}
}

class OutThread extends Thread {

	private Res res;

	public OutThread(Res res) {
		this.res = res;
	}

	@Override
	public void run() {
		while (true) {
			try {
				res.lock.lock();
				if (!res.flag) {
					try {
						// 使執行緒阻塞阻塞
						res.condition.await();
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				}
				System.out.println(res.name + "---" + res.sex);
				// 將狀態改為false 說明已經讀完了
				res.flag = false;
			} catch (Exception e) {
				// TODO: handle exception
			} finally {
				// 喚醒執行緒
				res.condition.signal();
				//解鎖
				res.lock.unlock();
			}
		}
	}
}

public class ThreadDemoLock {

	public static void main(String[] args) {
		Res res = new Res();
		InputThread inputThread = new InputThread(res);
		OutThread outThread = new OutThread(res);
		inputThread.start();
		outThread.start();
	}

}