[manyquestions]

Hi everyone, again.

Kind of similar to the other question I had earlier but regarding different data types. I created a hash set originally because I discovered the uberly cool feature that prevents duplicates. All has been well so far using this new data type for me however I can't go about SHUFFLEing it because it's not an arraylist. I tried searching for "how to shuffle a hash set" but it looks like you simply can't. Not that it's not possible but people don't.

So if I have a String set named "set" (which I fully plan on renaming later to a better name ), how do I convert it into a String array list?

Thank you for your help! Data types can be tricky in Java, much trickier than Perl where it just knows what to do with pretty much everything.

[GregBrannon]

Do you Google?

There are others.

[macosxnerd101]

Most Java Collections have a constructor that accepts another Collection as a parameter. So:

ArrayList<String> list = new ArrayList<String>(mySet);
Collections.shuffle(list);

Keep in mind a Set isn't indexed. The hashing determines where the elements go for HashSets. This is why you cannot shuffle them.

[SwiftStriker00]

Just follow this sample code:

Set<String> set = new HashSet<String>();
set.add("Dream");
set.add("In");
set.add("Code");
ArrayList<String> arrList= new ArrayList<String>(hashset);

This post has been edited by SwiftStriker00: 28 December 2011 - 09:56 AM