public class BoxDemo {
public static void main(String[] args) {
Box b = new Box();
Producer p = new Producer(b);
Customer c = new Customer(b);
Thread t1 = new Thread(p);
Thread t2 = new Thread(c);
t1.start();
t2.start();
}
}
public class Box {
private int milk;
private boolean state = false;
public synchronized void put(int milk) {
this.milk = milk;
if (state) {
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("送奶工将第" + this.milk + "瓶奶放入奶箱");
state = true;
notifyAll();
}
public synchronized void get() {
if (!state) {
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("用户拿到第" + this.milk + "瓶奶");
state = false;
notifyAll();
}
public class Customer implements Runnable {
private Box b;
public Customer(Box b) {
this.b = b;
}
@Override
public void run() {
while (true) {
b.get();
}
}
}
public class Producer implements Runnable {
private Box b;
public Producer(Box b) {
this.b = b;
}
@Override
public void run() {
for (int i = 1; i <= 5; i++) {
b.put(i);
}
}
}
Debug 的结果才是我想要的结果 找了半天没找到原因
求解答
应该是多线程没有处理好导致的,一半debug和release除了优化参数不一样外,都是一样的,因为debug加入了许多调试符号,所以执行可能会慢一点,结果正常,
release执行的快些,所以结果就不对了,一般都是多线程导致的
因为锁对象为Box,调用notifyAll可能把put方法等待的线程唤醒了,导致put执行两次