最近正在學多執行緒現在卡在一個地方是 A執行緒跑完以後B執行緒不會被喚醒以下是程式碼:

class Athread implements Runnable {
	public void run() {
		synchronized (this) {
			try {
				System.out.println("A點進入");
				for (int i = 1; i <= 10; i++) {
					System.out.println(i);
				}
				this.notifyAll();
			} catch (Exception e) {
			}
		
		}
	}
}
class Bthread implements Runnable {
	public void run() {
		synchronized (this) {
			try {
                this.wait();
				System.out.println("B點進入");
				for (int i = 1; i <= 10; i++) {
					System.out.println(i);
				}
			} catch (Exception e) {
			}
		}
	}
}

public static void main(String[] args) {
		Athread a = new Athread();
		Bthread b = new Bthread();
		Thread thr = new Thread(a);
		Thread thr1 = new Thread(b);
		thr.start();
		thr1.start();
	}

想請問各位我是否有地方理解錯了呢?
因為就我的理解是跑到notifyAll以後所有在wait()的執行緒都要被喚醒這樣
想請各位糾正一下
謝謝各位