Java sort object by list type property

Question

I have the following objects:

public class Shipping {
    String name;
    List methods;
}

public class Method {
    String serviceType;
    Strin         


        

Answer 1

You can define new Comparator to define your sort criteria like this:

Comparator shippingComparator = new Comparator{
public int compare(Shipping obj1, Shipping obj2) {
    //your rules for comparing Shipping1, Shipping 2 goes here
    //return -1 when obj1 should be before obj2
    //return 1 when obj1 should be after obj2
    //return 0 when obj1 is equal to obj2 and relative position doesnt matter
} 

Then use this comparator to sort your List:

ArrayList shippings;
//populate List
Collections.sort(shippings, shippingComparator );