curiosity regarding TreeModel

[naved momin]

when we build a jtree by passing model class which implements TreeModel interface
and in one of the constructor we do like

class MyModelClass implements TreeModel
String root;
public MyModelClass()
{
  this( "user.home");
}
public MyModelClass(String startPath)
{
 root = startPath;
}
 various other methods...override

} 

here my question is when this constructor will be called
does this model will have all the directories and sub-directories with in my home directory "user.home".
or it will just have top most directory
say like
just the directories within my home directory and no sub-directories

[Ranganathan Kaliyur Mannar]

naved momin wrote:here my question is when this constructor will be called

It will be called when you invoke it. You usually do it by calling tree.setModel(new MyModelClass());
(btw, MyModelClass is poor naming, you can just name it MyTreeModel or MyModel).

naved momin wrote:does this model will have all the directories and sub-directories with in my home directory "user.home".

It won't. The 'user.home' is just a String here. Unless you implement the getChildCount() and getChild() the way you want to, considering the 'user.home' as a directory and reading the directory to get the list of files.