JTree

the TreeModel API is
Object getRoot() int getChildCount(Object parent) Object getChild(Object parent, int index) int getIndexOfChild(Object parent, Object child) boolean isLeaf(Object node) void addTreeModelListener(TreeModelListener l) void removeTreeModelListener(TreeModelListener l) void valueForPathChanged(TreePath path, Object newValue)
removing icons in a JTree

JTree tree = new JTree(model);
DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
renderer.setOpenIcon(null);
renderer.setClosedIcon(null);
renderer.setLeafIcon(null);
tree.setCellRenderer(renderer);

example of a renderer

import java.text.SimpleDateFormat;
import java.awt.Component;
import java.util.Date;

public class MirroredTreeUICellRenderer extends DefaultTreeCellRenderer {

final static DateFormat format = new SimpleDateFormat("EEEE d MMMM yyyy HH:mm:ss");

    MirroredTreeUICellRenderer() {
        super();
        setOpenIcon(null);
        setClosedIcon(null);
        setLeafIcon(null);
    }

    public Component getTreeCellRendererComponent(JTree tree,
                                                  Object value,
                                                  boolean sel,
                                                  boolean expanded,
                                                  boolean leaf,
                                                  int row,
                                                  boolean hasFocus) {
        if (leaf) {
            MirroredFile file = (MirroredFile)value;
            Date modificationDate = file.getModificationDate();
            Date mirroredDate = file.getMirroredDate();
            setText(file.getName()+
                    " (" +
                    ((modificationDate==null) ? "N/A" : format.format(modificationDate)) +
                    ", " +
                    ((mirroredDate==null) ? "N/A" : format.format(mirroredDate)) +
                    ")");
        } else {
            MirroredDirectory file = (MirroredDirectory)value;
            setText(file.getName());
        }
        return this;
    }
}

Last update: March 13^th, 2004 - Laurent