public class TreeModelImpl implements TreeModel {
    public Object getRoot () {
        return ROOT;
    }
    
    public Object[] getChildren (Object parent, int from, int to) {
        if (parent == ROOT)
            return File.listRoots ();
        return ((File) parent).listFiles ();
    }
    
    public boolean isLeaf (Object node) {
        if (node == ROOT)
            return false;
        return ((File) node).isFile ();
    }
}
And create a TreeView for this model:
    JComponent treeView = Models.createView (
        Models.createCompoundModel (
	    Arrays.asList (new Model[] {
                new TreeModelImpl (),      // TreeModel
                new ArrayList ()           // list of ColumnModel s
            })
        )
    );
 
public class NodeModelImpl implements NodeModel {
    public String getDisplayName (Object node) {
        if (node == ROOT) return "Name";
        String name = ((File) node).getName ();
        if (name.length () < 1) return ((File) node).getAbsolutePath ();
        return name;
    }
    
    public String getIconBase (Object node) {
        if (node == ROOT) return "folder";
        if (((File) node).isDirectory ()) return "folder";
        return "file";
    }
    
    public String getShortDescription (Object node) {
        if (node == ROOT) return "Name";
        return ((File) node).getAbsolutePath ();
    }
}
 
public class NodeActionsProviderImpl implements NodeActionsProvider {
    public Action[] getActions (final Object node) {
        return new Action [] {
            new AbstractAction ("Open") {
                public void actionPerformed (ActionEvent e) {
                    performDefaultAction (node);
                }
            },
            new AbstractAction ("Delete") {
                public void actionPerformed (ActionEvent e) {
                    ((File) node).delete ();
                }
            }
        };
    }
    
    public void performDefaultAction (Object node) {
        try {
            JFrame f = new JFrame ("View");
            f.getContentPane ().add (new JEditorPane (((File) node).toURL ()));
            f.pack ();
            f.show ();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
 
public class TableModelImpl implements TableModel {
    
    public Object getValueAt (Object node, String columnID) {
        try {
            if (node == ROOT) return null;
            if (columnID.equals ("sizeID")) {
                if (((File) node).isDirectory ()) return "<dir>";
                return "" + new FileInputStream ((File) node).getChannel ().size ();
            }
        } catch (Exception e) {
            e.printStackTrace ();
        }
        return "";
    }
    
    public boolean isReadOnly (Object node, String columnID) {
        return true;
    }
    
    public void setValueAt (Object node, String columnID, Object value) {
    }
}
And initialization of columns looks like:
    ArrayList columns = new ArrayList ();
    columns.add (new ColumnModel () {
        public String getID () { return "sizeID"; }
        public String getDisplayName () { return "size"; }
        public Class getType () { return String.class; }
    });
    JComponent treeTableView = Models.createView (
        Models.createCompoundModel (
            Arrays.asList (new Model[] {
                new TreeModelImpl (),           // TreeModel
                new NodeModelImpl (),           // NodeModel
                new TableModelImpl (),          // TableModel
                new NodeActionsProviderImpl (), // NodeActionsProvider
                columns                         // list of ColumnModel s
            })
        )
    );