How to combine list of objects to single object java?

Question

I have a list of objects and I want to combine all object and create single object with all details, this is my 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; 

}

Let's say I have list like this:

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));

I want to create single object with all details like:

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

How can I achieve this result using java? I can't think any elegant solution!

Answer 1

Just collect the values out of the List.

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;
    // ...
}