概述
如下代码，执行多次，大部分程序会阻塞，不知道问题出现在哪，求教？
public class Main {
public static void main(String[] args) {
Serve s = new Serve();
Thread t1 = new Thread(new ThreadA(s));
Thread t2 = new Thread(new ThreadB(s));
t1.start();
t2.start();
}
}
class Serve {
private int count = 0;
private boolean hasCount = false;
public synchronized void addCount(int addCount) throws InterruptedException {
if(hasCount) {
wait();
System.out.println("add阻塞");
}else {
this.count += addCount;
hasCount = true;
notifyAll();
System.out.println("存钱，余额：" + this.count);
}
}
public synchronized void removeCount(int removeCount ) throws InterruptedException {
if(hasCount) {
this.count -= removeCount;
hasCount = false;
notifyAll();
System.out.println("取钱，余额：" + this.count);
}else {
wait();
System.out.println("remove阻塞");
}
}
}
class ThreadA implements Runnable {
private Serve s;
public ThreadA(Serve s) {
this.s = s;
}
@Override
public void run() {
for (int i = 0; i < 100; i++) {
try {
System.out.println("add" + i);
s.addCount(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
class ThreadB implements Runnable {
private Serve s;
public ThreadB(Serve s) {
this.s = s;
}
@Override
public void run() {
for (int i = 0; i < 100; i++) {
try {
System.out.println("remove" + i);
s.removeCount(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
最后
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