java——多线程——内部类共享同一个外部类对象的成员变量

public class Shop
{
    public static void main(String[] args)
    {
        Outer o=new Outer();
        Thread t1=o.getSale("T1 ");
        Thread t2=o.getSale("T2 ");
        /*Thread t1=new Thread(o,"T1");
        Thread t2=new Thread(o,"T2");*/
        t1.start();
        t2.start();
        System.out.println(Thread.currentThread().getName());

    }

}
    class Outer
    {
        Object temp=new Object();
        private  int ticket=100;
        public Thread getSale(String s)
        {
            return new Sale(s);
        }

        class Sale extends Thread//implements Runnable//
        {

            Sale(String s)
            {
                super(s);

            }
            public  void run()
            {

                        while(ticket>0)
                        {
                            try
                            {
                                Thread.currentThread().sleep(10);
                            } catch (InterruptedException e)
                            {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                            saletTicket(getName());
                        }

            }
            private  void saletTicket(String s)
            {
                synchronized (temp)
                {
                    if(ticket>0)
                    {
                        System.out.println(getName()+" ticket "+ticket--);
                        //ticket=tmp;
                    }

                }

            }

        }
    }

/*public class Shop {
        public static void main(String[] args) {
                Outer o = new Outer();
                o.getSale("s1:").start();
                o.getSale("s2:").start();
        }
}

class Outer {
        private int ticket = 100;

        public Thread getSale(String s) {

                return new Sale(s);
        }

        private class Sale extends Thread {
                Sale(String s) {
                        super(s);
                }

                public void run() {
                        while(ticket > 0){

                                try {
                                        sleep(100);
                                } catch (InterruptedException e) {
                                        e.printStackTrace();
                                }
                                ticket(getName());
                        }
                }
        }

        public synchronized void ticket(String name){
                if (ticket > 0) {
                        System.out.println(name + " ticket " + ticket--);
                }
        }
}*/

错误代码如下，这样只会让先抢到资源的线程执行到底。循环应放置在同步区外部

public class Shop
{
    public static void main(String[] args)
    {
        Outer o=new Outer();
        Thread t1=o.getSale("T1 ");
        Thread t2=o.getSale("T2 ");
        Thread t1=new Thread(o,"T1");
        Thread t2=new Thread(o,"T2");
        t1.start();
        t2.start();
        System.out.println(Thread.currentThread().getName());

    }

}
    class Outer
    {
        Object temp=new Object();
        private  int ticket=100;
        public Thread getSale(String s)
        {
            return new Sale(s);
        }

        class Sale extends Thread//implements Runnable//
        {

            Sale(String s)
            {
                super(s);

            }
            public  void run()
            {

                        try
                        {
                            Thread.currentThread().sleep(10);
                        } catch (InterruptedException e)
                        {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

                        saletTicket(getName());

            }
            private  void saletTicket(String s)
            {
                synchronized (temp)
                {
                    while(ticket>0)
                    {
                        System.out.println(getName()+" ticket "+ticket--);
                        //ticket=tmp;
                    }

                }

            }

        }
    }