class TicketsSystem
{
public static void main(String[] args)
{
SellThread st=new SellThread();
new Thread(st).start();
try
{
Thread.sleep(1);
}
catch(Exception e)
{
e.printStackTrace();
}
st.b=true;
new Thread(st).start();
}
}
class SellThread implements Runnable
{
int tickets=100;
Object obj=new Object();
boolean b=false;
public void run()
{
if(b==false)
{
while(true)
sell();
}
else
{
while(true)
{
synchronized(obj)
{
try
{
Thread.sleep(10);
}
catch(Exception e)
{
e.printStackTrace();
}
synchronized(this)
{
if(tickets> 0)
{
System.out.println( "obj: "+Thread.currentThread().getName()+
" sell tickets: "+tickets);
tickets--;
}
}
}
}
}
}
public synchronized void sell()
{
synchronized(obj)
{
if(tickets> 0)
{
try
{
Thread.sleep(10);
}
catch(Exception e)
{
e.printStackTrace();
}
System.out.println( "sell(): "+Thread.currentThread().getName()+ " sell tickets: "+tickets);
tickets--;
}
}
}
}
程序能打印出（线程名+sell tickets:0）搞不明白
而且好像结果打印出来的语句 obj sell tickets与
sell(): sell tickets是交替出现的
------解决方案--------------------
没有出现你说的情况