public class SalesLady { 
int memontoes, five, ten; 

    public synchronized String ruleForSale(int num, int money) { 
        String s = null; 
        if (memontoes <= 0) 
            return "對不起，已經(jīng)售完"; 
        if (money == 5) { 
            memontoes--; 
            five++; 
            s = "給你票，" + "你的錢正好。"; 
        } else if (money == 10) { 
            while (five < 1) { 
                try { 
                    System.out.println("" + num + "號顧客用10元購票，請等待"); 
            	wait(); 
                } catch (InterruptedException e) { 
                } 
            } 
            memontoes--; 
            five -= 1; 
            ten++; 
            s = "給你票，" + "找你5元。"; 
        } 
        //notifyAll(); 
        return s; 
    } 

    SalesLady(int m, int f, int t) { 
        memontoes = m; 
        five = f; 
        ten = t; 
    } 

}