Sorting a list of object using comparator

[Ankit Chandrawat]

Hi,

I have a list of Objects. The Object has a Map and the Map has a key lastReplicatedDate. I need to sort the list of Object using this lastReplicatedDate in descending order. How do I achieve this. I want to implement is using Collections.sort(List, Comparator) and hence want to write a Comparator for this.

Thanks in advance,
Ankit

[Jesper de Jong]

You'll have to create a class that implements the Comparator interface for the type of the objects that you want to compare, and then in the compareTo() method compare the two objects that you get as arguments using the rules that you described.

Try it yourself - and if you get stuck, please post your code and explain what the problem is.

[Campbell Ritchie]

There is a section about ordering in the Java Tutorials. I think that would be helpful