摘要： 
### 1. Customer.java ``` package chapter07.pinExer; // 客户类 public class Customer { private String name; private char gender; //性别 private int age; pri 阅读全文
### 1. Customer.java ``` package chapter07.pinExer; // 客户类 public class Customer { private String name; private char gender; //性别 private int age; pri 阅读全文