创建类的实例并将其添加到映射中。Java

Question

好吧，假设我有两节课。一个顾客和一个商店。

  // In the class customer, I have 3 instance variables. 
  private String aFullName; 
  private String address;
  private char age; 

 // Then in the constructor, I have initialised these too:
 this.aFullName = fullName; 
 this.address = anAddress;
 this.age = anAge;

 //In my second class then, the shop...
 //I only have one variable where I've referenced a map: 
 private Map<String, Customer> customers;

//My constructor:
public Shop()
{
super();
customers = new HashMap<>()
}

我的问题是：

public void addCustomer(String memNo, String name, String address, char ageCat)
// where memNo is going to be the key.

Answer 1

这可以通过创建一个包含4个参数的addCustomer方法来实现，然后在该方法内部实例化一个新的Customer对象，并用相关的键将其放入映射中。

public void addCustomer(String memNo, String name, String address, char ageCat) {
    customers.put(memNo, new Customer(name, address, ageCat);
}