Java Utililty Methods JTree Node

List of utility methods to do JTree Node

HOME
Java
J
JTree Node

Description

The list of methods to do JTree Node are organized into topic(s).

Method

DefaultMutableTreeNode addChildNode(DefaultMutableTreeNode parent, Object child)
add Child Node

HashSet hashSet = new HashSet();
DefaultMutableTreeNode childNode;
for (int i = 0; i < parent.getChildCount(); i++) {
 hashSet.add(parent.getChildAt(i).toString());
if (hashSet.add(child.toString())) {
 childNode = new DefaultMutableTreeNode(child);
 parent.insert(childNode, parent.getChildCount());
...

DefaultMutableTreeNode addCloneNode(DefaultMutableTreeNode srcNode, DefaultMutableTreeNode root)
add Clone Node

DefaultMutableTreeNode clone = new DefaultMutableTreeNode(srcNode.getUserObject());
root.add(clone);
for (int i = 0; i < srcNode.getChildCount(); i++) {
 DefaultMutableTreeNode child = (DefaultMutableTreeNode) srcNode.getChildAt(i);
 addCloneNode(child, clone);
return clone;

void ApplyFilter(DefaultMutableTreeNode node, String filter)
Apply Filter

if (node.getChildCount() == 0) {
 if (!node.toString().endsWith(filter)) {
 node.removeFromParent();
 return;
for (int i = 0; i < node.getChildCount(); i++) {
 ApplyFilter((DefaultMutableTreeNode) node.getChildAt(i), filter);
...

DefaultMutableTreeNode cloneTreeNode(DefaultMutableTreeNode srcNode)
clone Tree Node

if (srcNode == null)
 return null;
DefaultMutableTreeNode node = new DefaultMutableTreeNode(srcNode.getUserObject());
for (int i = 0; i < srcNode.getChildCount(); i++) {
 DefaultMutableTreeNode child = (DefaultMutableTreeNode) srcNode.getChildAt(i);
 addCloneNode(child, node);
return node;
...

void collapseSubTree(JTree tree, DefaultMutableTreeNode startNode, DefaultTreeModel model)
Collapse the subtree starting at startNode node

if (startNode.isLeaf()) {
 return;
for (Enumeration e = startNode.children(); e.hasMoreElements();) {
 DefaultMutableTreeNode node = (DefaultMutableTreeNode) e.nextElement();
 collapseSubTree(tree, node, model);
TreePath tp = new TreePath(model.getPathToRoot(startNode));
...

boolean contains(final JTree tree, final TreeNode node)
Tests whether a tree contains a given node.

return isAncestor(node, (TreeNode) tree.getModel().getRoot());

void copyDMTreeNode(DefaultMutableTreeNode out, DefaultMutableTreeNode in)
Makes a deep copy of a gives DMTreeNode.

int curDepth = 0;
DefaultMutableTreeNode cur = null;
DefaultMutableTreeNode new_node = null;
DefaultMutableTreeNode curDepthNode = null;
cur = in;
curDepth = cur.getLevel();
curDepthNode = out;
cur = (DefaultMutableTreeNode) cur.getNextNode();
...

DefaultMutableTreeNode createFolderNode(Object userObject)
create Folder Node

DefaultMutableTreeNode newFolder = new DefaultMutableTreeNode(userObject) {
 public boolean isLeaf() {
 return false;
};
return newFolder;

DefaultMutableTreeNode createSubTreeIfNecessary(TreeModel model, DefaultMutableTreeNode parent, String childName)
create Sub Tree If Necessary

DefaultMutableTreeNode ret = null;
ret = getSubtree(parent, childName);
if (ret == null) {
 ret = new DefaultMutableTreeNode(childName + "(0)");
 DefaultTreeModel dtm = (DefaultTreeModel) model;
 dtm.insertNodeInto(ret, parent, 0);
return ret;
...

void expandAll(JTree tree, DefaultMutableTreeNode root)
Expand all the children nodes of the specified TreeNode.

Enumeration<?> nodes = root.children();
while (nodes.hasMoreElements()) {
 Object node = nodes.nextElement();
 if (node instanceof DefaultMutableTreeNode) {
 TreePath path = new TreePath(((DefaultMutableTreeNode) node).getPath());
 if (!tree.isExpanded(path)) {
 tree.expandPath(path);