Bug 21357 [Viewers] TreeViewer(Composite parent,int style) javadoc error
The javadoc explains what style-bits are set, but it's obviously a copy'n'paste error: Creates a tree viewer on a newly-created tree control under the given parent. The tree control is created using the given SWT style bits. The viewer has no input, no content provider, a default label provider, no sorter, and no filters. The tree control has the MULTI, H_SCROLL, V_SCROLL and BORDER style bits set.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
protected void addTreeListener(Control c, TreeListener listener) {
	((Tree)c).addTreeListener(listener);
}
/* (non-Javadoc)
 * Method declared in AbstractTreeViewer.
 */
protected void doUpdateItem(Item item, Object element) {
	
	ILabelProvider provider = (ILabelProvider) getLabelProvider();
	item.setText(provider.getText(element));
	Image image = provider.getImage(element);
	if (item.getImage() != image) {
		item.setImage(image);
	}
	if (provider instanceof IColorProvider) {
		IColorProvider cp = (IColorProvider) provider;
		TreeItem treeItem = (TreeItem) item;
		treeItem.setForeground(cp.getForeground(element));
		treeItem.setBackground(cp.getBackground(element));
	}
}
/* (non-Javadoc)
 * Method declared in AbstractTreeViewer.
 */
protected Item[] getChildren(Widget o) {
	if (o instanceof TreeItem)
		return ((TreeItem) o).getItems();
	if (o instanceof Tree)
		return ((Tree) o).getItems();
	return null;