java - 数组列表java程序

Question

帮助使用数组列表编写程序，该数组列表存储名称、地址、电话号码、日期和时间(每个客户)的值，稍后我需要检索特定信息，例如指定日期的所有客户姓名。如有任何帮助，我们将不胜感激。

代码:

public class Details {
    public static void main(String args[]) throws IOException {
        InputStreamReader rdr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(rdr);
        String s;
        s = br.readLine();
        System.out.println("PLEASE ENTER CLIENT NAME");
        String name = br.readLine();
        System.out.println("PLEASE ENTER CLIENT ADDRESS");
        String add = br.readLine();
        System.out.println("PLEASE ENTER CLIENT CONTACT PHONE NUMBER");
        String pnum = br.readLine();
        List list = new ArrayList();
        list.add("name");
        list.add("add");
        list.add("pnum");
        list.add("food");
    }
}

Answer 1

像这样创建一个类Customer -

public class Customer{
   private String name; 
   private String address;
   private String phoneNumber;
   private Date date;

  public Customer(name, address, phoneNumber, date){

     this.name = name;
     this.address = address;
     this.phoneNumber = phoneNumber;
     this.date = date;
  }

   //getters and setters method

}

之后，您创建一个像这样的 Customer ArrayList -

List<Customer> `customerList` = new ArrayList<Customer>();  

现在创建一个 Customer 的对象/实例，如下所示 -

Customer aCustomer = new Customer("ranjit", "someAddress", "023-859 74", new Date() );

然后将 Customer 对象/实例 aCustomer 添加到 Customer 的 ArrayList - customerList像这样:

customerList.add(aCustomer);

通过给定的方式，您可以更轻松地处理客户。现在您有一个包含所有客户属性(姓名、地址、电话号码等)的实体。因此，您不需要将所有属性/属性存储在单独的 ArrayList

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