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Sorting Arraylist

Rajendra Prakash
Ranch Hand

Joined: Sep 10, 2009
Posts: 293
In a ArrayList , I have 10 records with columns Name , Age , Salary.
I want to sort ArrayList based on Age. How to do this
pete stein
Bartender

Joined: Feb 23, 2007
Posts: 1561
If the items contained in the ArrayList implement Comparable and if the compareTo method uses the age as the basis for comparison, you're set, simply call Collections.sort(yourArrayList) on your array list. If not, then you'll want to create a Comparator class that has a compare method that uses age as a basis for comparison and use an object of that class in the Collections.sort(yourArrayList, yourComparatorObject) method overload that takes a Comparator. Have a look at the Collections class and you'll see what I mean.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 40052
    
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This Java™ Tutorials section might help
 
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subject: Sorting Arraylist