charvax.swing.tree
Interface TreeModel
- DefaultTreeModel
public interface TreeModel
This interface defines a suitable data model for a JTree.
addTreeModelListener
public void addTreeModelListener(TreeModelListener l)
Adds a listener for the TreeModelEvent posted after the tree changes.
getChild
public Object getChild(Object parent,
int index)
Returns the child of parent at index index in the parent's child
array. parent must be a node previously obtained from this data
source. This should not return null if index is a valid index for
parent (that is index >= 0 && index < getChildCount(parent)).
getChildCount
public int getChildCount(Object parent)
Returns the number of children of parent. Returns 0 if the node
is a leaf or if it has no children. parent must be a node previously
obtained from this data source.
getRoot
public Object getRoot()
Returns the root of the tree.
Returns null only if the tree has no nodes.
isLeaf
public boolean isLeaf(Object node)
Returns true if node is a leaf. It is possible for this method to
return false even if node has no children. A directory in a
filesystem, for example, may contain no files; the node representing
the directory is not a leaf, but it also has no children.
removeTreeModelListener
public void removeTreeModelListener(TreeModelListener l)
Removes a listener previously added with addTreeModelListener.
valueForPathChanged
public void valueForPathChanged(TreePath path,
Object newValue)
Called when the user has altered the value for the item
identified by path to newValue. If newValue signifies a truly new
value the model should post a treeNodesChanged event.