How to Sort HashSet in Java

In this post, we will see how to sort HashSet in java.

HashSet is a collection which does not store elements in any order. You might come across a situation where you need to sort HashSet.

There can be many ways to sort HashSet, we will see two methods here.

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Using TreeSet

You can use TreeSet to sort HashSet. As you know that TreeSet stores objects in ascending order by default.

Before Sorting: [Steve, John, Martin, Andy, Mary] ================================== After Sorting: [Andy, John, Martin, Mary, Steve]

Using Collections’s sort

You can convert HashSet to List and then use Collections’s sort method to sort the HashSet.

When you run above program, you will get below output:

Before Sorting:
[Steve, John, Martin, Andy, Mary] ==================================
After Sorting:
[Andy, John, Martin, Mary, Steve]

That’s all about how to sort HashSet in java.


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