Java Generic TreeSet

Question

Hi I have problem with creating a generic TreeSet with its Iterator. I want to use it to three different kind of Types.

Can anyone help me how to do that?

Your question is not clear. Please add some pseudocode to help illustrate what you want. — Oliver Charlesworth, Mar 18 '12 at 21:17

score 1 · Answer 1 · edited May 23 '17 at 12:32

1

If you want to create a TreeSet which contains objects of type ClassA, ClassB and ClassC you'd have to use

TreeSet<MostSpecificSupertypeOfABC>

If if there's no suitable type to use, you could create one as I have described in an answer to the question below:

edited May 23 '17 at 12:32

Community

answered Mar 18 '12 at 21:25

aioobe

What I'm trying is that, I have 3 TreeSets each with different type and I want to create a new generic TreeSet inside a method and passing those TreeSets to the method and create a generic Iterator and work on it. – Mohammed Mohammed Mar 18 '12 at 21:56
public void method(TreeSet> set) { if(set.equals("SetA")) Iterator iter = SetA.iterator(); else if(set.equals("SetB")) Iterator iter = SetB.iterator(); else if(set.equals("SetC")) Iterator iter = SetC.iterator(); while(iter.hasNext()) iter.next().getName();} getName is inside each of the three TreeSet – Mohammed Mohammed Mar 18 '12 at 22:06
I refrained from writing an answer when you first posted your question because I didn't understand what you want to do. After seeing this code in your comment, I still do not understand what you want to do. Can you explain once more, in detail, what you are trying to do? – Irfy Mar 18 '12 at 22:16
Are you simply trying to add all elements from `SetA`, `SetB` and `SetC` to a new `Set`? – Irfy Mar 18 '12 at 22:17
I'm reading the name of the treesets from a file and I have to check each time which treeset its, after finding its name I have to work on it. – Mohammed Mohammed Mar 18 '12 at 22:32

1 Answers1