Question

I have a class for example Person.

public class Person {
    private Integer age;
    private String firstName;
    private String lastName;
   // getters and setters
}

I want to sort this in the ORDER BY style, which is provided by SQL queries. Collections.sort(listOfPersons, ) should return me data in this fashion.
“SELECT * FROM PERSONS ORDER BY AGE, FIRSTNAME, LASTNAME;”

Answer 1

Implement your own Comparator would do, like:

Collections.sort(listOfPerson, new Comparator() {
    public int compare(Person p1, Person p2) {
        ...
    }
});