Sorting a HashMap by date

Question

In a Java class I have a method to reOrder an existing HashMap by date. The HashMap is of a type where the Object contains a field called exp

Answer 1

1. Get all Entries by calling entrySet() method of Map

2. Create a custom Comparator to sort entries based upon values

3. Convert Entry set to List

4. Sort Entry list by using Collections.sort() method by passing your value comparator

5. Create a LinkedHashMap by adding entries in sorted order.

Look at example code @ Sort HasMap by value