线程问题，一个线程打印0-100，另一个打印0-50，如何利用synchronized和wait notify实现

Question

一个线程打印0-100，另一个打印0-50，如何利用synchronized和wait notify实现

Answer 1

    private static final    Object LOCK_INFO = new Object();
private static volatile int    i         = 1;
private static volatile int    last      = i;
private static final    int    minSize   = 50;
private static final    int    maxSize   = 100;

static class MyThread1 extends Thread {

    private final int size;

    public MyThread1(int size) {
        this.size = size;
    }

    @Override
    public void run() {
        for (int j = 0; j < size; j++) {
            synchronized (LOCK_INFO) {
                if (last == i) {
                    System.out.println(this.getName() + ", i:" + i++);
                    if (j > minSize - 1) {
                        last = i;
                    }
                } else {
                    System.out.println(this.getName() + ", i:" + last);
                    last = i;
                }
                try {
                    LOCK_INFO.notify();
                    if (j < minSize - 1) {
                        LOCK_INFO.wait();
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}

public static void main(String[] args) throws InterruptedException {
    Thread a = new MyThread1(minSize);
    Thread b = new MyThread1(maxSize);
    a.start();
    b.start();
}