如何將對象列表組合到單個 object java？

Question

我有一個對象列表，我想組合所有 object 並創建一個包含所有詳細信息的 object，這是我的 class

public class Customer {

private String name;
private String address;
private Integer salary;
private Integer yearOfBirth;
private String city;
private String gender;
private Integer age; 

}

假設我有這樣的列表：

List<Customer> customers =  new ArrayList<>();
customers.add(new Customer("ABC", "QWE", null, null, null, null, null));
customers.add(new Customer(null, null, 12345, 1995, null, null, null));
customers.add(new Customer(null, null, null, null, "zxcv", "M", 12));

我想創建單個 object 的所有詳細信息，例如：

Customer customer = Customer("ABC", "QWE", 12345, 1995, "zxcv", "M", 12);

如何使用 java 實現此結果？ 我想不出任何優雅的解決方案！

Answer 1

只需從列表中收集值。

Customer customer = new Customer(null, null, null, null, null, null, null)

foreach (Customer tmp : customers)
{
    customer.name    = (tmp.name    == null) ? customer.name    : tmp.name;
    customer.address = (tmp.address == null) ? customer.address : tmp.address;
    // ...
}