Sorting a list in Java using 2 criteria

Question

I have a list of objects. Each object contains a String and a Date (amongst others).

I want to first sort by the String and then by the Date.

How could this be done in the cleanest way possible?

Thanks!

Krt_Malta

Answer 1

With Java 8, this is really easy. Given

class MyClass {
    String getString() { ... }
    Date getDate() { ... }
}

You can easily sort a list as follows:

List<MyClass> list = ...
list.sort(Comparator.comparing(MyClass::getString).thenComparing(MyClass::getDate));