Hi,
I have a custom class with some fields (Subject and StartTime) and custom comparer for sorting the time values and stored data in ArrayList collection.
Sample Data in collection:
Subject = App1 and StartTime = 25/11/2019
Subject = App1 and StartTime = 26/11/2019
Subject = App1 and StartTime = 27/11/2019
Subject = App1 and StartTime = 28/11/2019
Subject = App1 and StartTime = 29/11/2019
Subject = App1 and StartTime = 30/11/2019
Subject = App1 and StartTime = 01/12/2019
Subject = App2 and StartTime = 25/11/2019
Subject = App2 and StartTime = 26/11/2019
Subject = App2 and StartTime = 27/11/2019
Subject = App2 and StartTime = 28/11/2019
Subject = App2 and StartTime = 29/11/2019
Subject = App2 and StartTime = 30/11/2019
Subject = App2 and StartTime = 01/12/2019
Subject = App3 and StartTime = 25/11/2019
Subject = App3 and StartTime = 26/11/2019
Subject = App3 and StartTime = 27/11/2019
Subject = App3 and StartTime = 28/11/2019
Subject = App3 and StartTime = 29/11/2019
Subject = App3 and StartTime = 30/11/2019
Subject = App3 and StartTime = 01/12/2019
Problem:
FYI : Date values in collection are from 25/11/2019 to 01/12/2019 (including Saturday and Sunday).
After sorting the date values, times are sorted properly but objects or records order is changed.
Expected result:
Subject = App1 and StartTime = 25/11/2019
Subject = App2 and StartTime = 25/11/2019
Subject = App3 and StartTime = 25/11/2019
Subject = App1 and StartTime = 26/11/2019
Subject = App2 and StartTime = 26/11/2019
Subject = App3 and StartTime = 26/11/2019
Observed result:
Subject = App1 and StartTime = 25/11/2019
Subject = App3 and StartTime = 25/11/2019
Subject = App2 and StartTime = 25/11/2019
Subject = App1 and StartTime = 26/11/2019
Subject = App3 and StartTime = 26/11/2019
Subject = App2 and StartTime = 26/11/2019
//
//
Subject = App3 and StartTime = 28/11/2019
Subject = App2 and StartTime = 28/11/2019
Subject = App1 and StartTime = 28/11/2019
Note: This problem occurs only when collection has Saturday and Sunday values (30/11/2019 and 01/12/2019).
If don’t have that 2 dates in collection, the records are in correct order as expected result after sorting.
Here I have attached sample demo & screenshots for your reference.
Please guide me to have sorted objects in correct order as expected result (with Sat and Sun dates) and let me know if I did anything wrong.
Thanks,
