Icons in a JTree

Question

Hi,
I have made a JTree that displays the content of my harddisk.
I want that a Node in the JTree that representing a disk get an disk icon.
I can get the disk icon from the FileView class.
when I change the icon of a node all the other icons of the others node change.
What can I do about this ??
Need an example ??
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Answer 1

Make a custom TreeCellRenderer, and in the renderer put in logic so that the icon it uses depends on the node that is being rendered. If you just return the same icon for every node, then you will see the same icon on every node (no surprise there).
Easiest way is to subclass DefaultTreeCellRenderer, and then if the node (value or row) to be rendered is one of your 'special' nodes, return the icon for your HD, if not, then just return the value returned from calling super's method so you get the default.public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected,
    boolean expanded, boolean leaf, int row, boolean hasFocus) {
    // Use some mechanism to see if the node to be rendered is one of your 'special' nodes that
    // needs the custom icon.  You can do this a number of ways depending on your TreeModel
    if( value instanceof MySpecialValue || row == oneOfMySpecialRows ) {
        return myIcon;
    } else {
        return super.getTreeCellRendererComponent( tree, value, selected, expanded, leaf, row, hasFocus );
}Make sure the component you return for rendering the node takes care of rendering the text as well. Take a look at the code in DefaultTreeCellRenderer.