两个多线程的交替打印

package cn.thread;

public class ManyThread {
    public static void main(String[] args) {
        Object obj = new Object();
        new Thread(new MyHandler1(obj), "t1").start();
        new Thread(new MyHandler2(obj), "t2").start();
    }
}

class MyHandler1 implements Runnable {
    Object obj;
    int count = 1;

    public MyHandler1(Object obj) {
        this.obj = obj;
    }

    @Override
    public void run() {
        for (int i = 1; i < 10; i++) {
            synchronized (obj) {
                try {
                    // if (count % 2 == 1) {// 打印所有的奇数
                    System.out.println(Thread.currentThread().getName()
                            + "__count=" + count);
                    count += 2;
                    if (i < 9) {
                        obj.notify();
                        obj.wait();
                        Thread.sleep(300);
                    }else{
                        obj.notify();
                        Thread.sleep(300);
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

class MyHandler2 implements Runnable {
    Object obj;
    int count = 2;

    public MyHandler2(Object obj) {
        this.obj = obj;
    }

    @Override
    public void run() {
        for (int i = 1; i < 10; i++) {
            synchronized (obj) {
                try {

                    System.out.println(Thread.currentThread().getName()
                            + "__count=" + count);
                    count += 2;
                    if (i < 9) {
                        obj.notify();
                        obj.wait();
                        Thread.sleep(300);
                    }else{
                        obj.notify();
                        Thread.sleep(300);
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}