java 中之经典多线程问题——进水放水

public class ThreadInflowAndOutflow {

public static void main(String[] args) {
Water water=new Water();

inflow fi=new inflow(water);
outflow of=new outflow(water);

Thread t1=new Thread(fi);
Thread t2=new Thread(of);

t1.start();
t2.start();

}

}

class Water{

int count = 50;
}
class inflow implements Runnable{

Water water;
public inflow(Water water){
this.water=water;
}

@Override
public void run() {

while(true){
synchronized (water) {
while(true){
if(water.count>=20){
water.notify();

try {
water.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}

try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}

water.count+=3;
System.out.println("现在是在进水，水量为："+water.count);
}
}
}
}

}


class outflow implements Runnable{

Water water;
public outflow(Water water){
this.water=water;
}


@Override
public void run() {

while(true){
synchronized (water) {
while(true){
if(water.count<=30){
water.notify();

try {
water.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}

}

try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}

water.count--;
System.out.println("现在是放水，剩余水量为："+water.count);
}
}
}

}

}