|
|
我今天自己写了一下这个小程序
这个题目的要求是 ：
有4对家庭，分别有爸爸，妈妈，儿子，女儿
爸爸们专门负责往盘子里放苹果，妈妈们专门负责往盘子里放橘子，
儿子门专门吃盘子里的橘子；女儿们专门吃盘子里的苹果；
注意；盘子里最多只能有10个水果，而且每次只能放或者取一个水果；
就这么多了，代码在下面，运行出现了点问题，好象有时候 某些方法被访问多次，
有兴趣的可以运行一下代码，帮我分析一下原因，谢谢 了
class ThreadTest
{
public static void main(String[] args)
{
Plate q=new Plate();
Father f1=new Father(q);
Father f2=new Father(q);
Father f3=new Father(q);
Father f4=new Father(q);
Mother m1=new Mother(q);
Mother m2=new Mother(q);
Mother m3=new Mother(q);
Mother m4=new Mother(q);
Son s1=new Son(q);
Son s2=new Son(q);
Son s3=new Son(q);
Son s4=new Son(q);
Daughter d1=new Daughter(q);
Daughter d2=new Daughter(q);
Daughter d3=new Daughter(q);
Daughter d4=new Daughter(q);
f1.start();
f2.start();
f3.start();
f4.start();
m1.start();
m2.start();
m3.start();
m4.start();
s1.start();
s2.start();
s3.start();
s4.start();
d1.start();
d2.start();
d3.start();
d4.start();
}
}
class Father extends Thread
{
Plate q;
Father(Plate q)
{
this.q=q;
}
public void run()
{
while(true)
{
q.putApple(q.apple);
System.out.println(Thread.currentThread().getName()+" put one apple:
the number of apple in the plate:"+q.apple);
}
}
}
class Mother extends Thread
{
Plate q;
Mother(Plate q)
{
this.q=q;
}
public void run()
{
while(true)
{
q.putOrange(q.orange);
System.out.println(Thread.currentThread().getName()+" put one
orange:the number of orange in the plate:"+q.orange);
}
}
}
class Son extends Thread
{
Plate q;
Son(Plate q)
{
this.q=q;
}
public void run()
{
while(true)
{
System.out.println(Thread.currentThread().getName()+" get one orange:the
number of orange in the plate:"+q.getOrange());
}
}
}
class Daughter extends Thread
{
Plate q;
Daughter(Plate q)
{
this.q=q;
}
public void run()
{
while(true)
{
System.out.println(Thread.currentThread().getName()+"Daughter get one
apple:the number of apple in the plate:"+q.getApple());
}
}
}
class Plate
{
int apple=0;
int orange=0;
int pFull=10;
public synchronized void putApple(int i)
{
if(pFull<11 && pFull>0)
{
i++;
apple=i;
pFull--;
notifyAll();
}
try
{
wait();
}
catch(Exception e)
{
e.printStackTrace();
}
}
public synchronized int getApple()
{
if(apple<1 || apple>10)
{
try
{
wait();
}
catch(Exception e)
{
e.printStackTrace();
}
}
pFull++;
notifyAll();
apple--;
return apple;
}
public synchronized void putOrange(int i)
{
if(pFull<11 && pFull>0)
{
i++;
orange=i;
pFull--;
notifyAll();
}
try
{
wait();
}
catch(Exception e)
{
e.printStackTrace();
}
}
public synchronized int getOrange()
{
while(orange<1 || orange>11)
{
try
{
wait();
}
catch(Exception e)
{
e.printStackTrace();
}
}
pFull++;
notifyAll();
orange--;
return orange;
}
}
|
|
发表于 2020-1-6 19:10:01
楼主