线程同步

package day12.javaAdvance.homework.Thread;

public class ThreadTest {
	public static void main(String[] args) {

		Object obj = new Object();
		printNumber1 pn = new printNumber1(obj);
		pn.start();
		printChar1 pc = new printChar1(obj);
		Thread t = new Thread(pc);
		t.start();
	}
}

class printNumber1 extends Thread {
    //创建一个临界资源obj
	Object obj = new Object();

	public printNumber1(Object obj) {
		this.obj = obj;
	}

	public void run() {
		// 同步代码块：
		synchronized (obj) {
			for (int i = 1; i <= 26; i++) {
				System.out.println(2 * i - 1);
				System.out.println(2 * i);
				obj.notifyAll();// 释放/唤醒等待队列所有对象
				try {
					obj.wait();// 等待队列
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}
	}
}

class printChar1 implements Runnable {

	Object obj = new Object();

	public printChar1(Object obj) {
		this.obj = obj;
	}

	public void run() {
		// 同步代码块：
		synchronized (obj) {
			for (char i = 'A'; i <= 'Z'; i++) {
				System.out.println(i);
				obj.notifyAll();
				try {
					obj.wait();
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}
	}
}