JTree listeners

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#16880

From: Leo Cohen
Date: Tue, 12 Jan 1999 00:00

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I am trying to add a JTree listener to my program. The code

      JTree viewTree = new JTree();
      TreeModel mdl = new ViewTreeModel(st, root);
      viewTree.setModel(mdl);
      mdl.addTreeModelListener(?);

needs a parameter for the addTreeModelListener() call. JTree has the
line  JTree.this.getModel().addTreeModelListener(this); in the method
AccessibleJTree() within the AccessibleJTree class.

Question: since the proper form for
addTreeModelListener(TreeModelListener tml) includes a parameter as
shown, why does addTreeModelListener(this) work in JTree class when this
refers to JTree (or AccessibleJTree)?

I get a compiler error when I mimick this code with the line
mdl.addTreeModelListener(viewTree);



-- 
Leo Cohen

116-1 Howard Drive
Charlottesville, VA  22903

804-243-8922 (UVA)
804-244-4648 (home)
804-244-7922 (fax)
lcohen@cs.virginia.edu

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From: Leo Cohen <lcohen@cs.virginia.edu>
Subject: JTree listeners
Date: 1999/01/12
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