JTree without leaf

Question

Is it possible to make a JTree without leaf? If it is possible then please tell me way.

JTree image

I want to convert these highlighted leafs as the folder or parent.

If you want any thing else apart from it then please let me know.

It's not clear what you're asking do you mean you want your leaf nodes to be represented in the UI as folders? — Tom, Nov 06 '12 at 07:25
did you read [JTree tutorial](http://docs.oracle.com/javase/tutorial/uiswing/components/tree.html), to create only XxxTreeNodes — mKorbel, Nov 06 '12 at 07:45
@mkorbel I have already read this tutorial sir,I did not get my answer over there that's why i put a question here. — Java_Alert, Nov 06 '12 at 08:39
to create only Nodes, but doesn't make me sence, Iwoundn't be going this way, better would be customize JTrees look, put there Icons that change built_in output to the screen, the same for nodes, same for leafs — mKorbel, Nov 06 '12 at 08:45

score 2 · Answer 1 · edited Apr 13 '17 at 12:40

As shown in this FileTreeModel, isLeaf() should return false and getChildCount() should return 0 for directories. The result is illustrated here; although not apparent, the test directory is empty.

@Override
public boolean isLeaf(Object node) {
    File f = (File) node;
    return !f.isDirectory();
}

@Override
public int getChildCount(Object parent) {
    File f = (File) parent;
    if (!f.isDirectory()) {
        return 0;
    } else {
        return f.list().length;
    }
}

score 1 · Answer 2 · answered Nov 06 '12 at 07:28

1

I think if you always return true from isLeaf in your TreeModel but return 0 from getChildCount for your leaf nodes you'll get what you want.

answered Nov 06 '12 at 07:28

Tom

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Thanks Tom for your reply But i want to know how to restrict tree to nodes only. – Java_Alert Nov 06 '12 at 07:37
2

I guess I just don't understand what you're asking, re-reading seems to point this as the answer especially given your reply to my comment. – Tom Nov 06 '12 at 07:46
Can you please elaborate your answer more. – Java_Alert Nov 06 '12 at 08:41

JTree without leaf

2 Answers2