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Use Comparator to sort more than one column

 
Wiyanto Ngasinur
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I'm using comparator interface to sort list of object.
Problem comes when there are more than one column to sort. For example :
I've unsorted tables :
Id|Department|Sub Department
1 Test Sub Test
2 Abap Sub Abap2
3 Abap Sub Abap1

How do i have two sort, Department then sub department. It become :
Id|Department|Sub Department
3 Abap Sub Abap1
2 Abap Sub Abap2
1 Test Sub Test

I'm implementing Comparator interface :


but it doesn't worked. Any idea ?
 
Ernest Friedman-Hill
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It's more like



You compare using the second key only of the first keys are equal.
 
Wiyanto Ngasinur
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thanks, you save me a lot time.
 
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