public class CustomerClass implements Runnable { 

int num, money; 
public SalesLady salesLady; 


    public void run() { 
        try { 
            Thread.sleep(10); 
        } 
        catch (InterruptedException e) { 
        } 
        System.out.println("我是" + num + "號顧客，用" + money + "元購票,售票員說：" 
                + salesLady.ruleForSale(num, money)); 
    } 

    CustomerClass(int n, int m, SalesLady salesLady) { 
        num = n; 
        money = m; 
        this.salesLady = salesLady; 
    } 


}