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<TITLE>Converting All Nodes in a JTree Component to a TreePath Array
(Java Developers Almanac Example)
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<h3>
e1027.
Converting All Nodes in a JTree Component to a TreePath Array</h3>
<pre>
// If expanded, return only paths of nodes that are expanded.
public TreePath[] getPaths(JTree tree, boolean expanded) {
TreeNode root = (TreeNode)tree.getModel().getRoot();
// Create array to hold the treepaths
List list = new ArrayList();
// Traverse tree from root adding treepaths for all nodes to list
getPaths(tree, new TreePath(root), expanded, list);
// Convert list to array
return (TreePath[])list.toArray(new TreePath[list.size()]);
}
public void getPaths(JTree tree, TreePath parent, boolean expanded, List list) {
// Return if node is not expanded
if (expanded && !tree.isVisible(parent)) {
return;
}
// Add node to list
list.add(parent);
// Create paths for all children
TreeNode node = (TreeNode)parent.getLastPathComponent();
if (node.getChildCount() >= 0) {
for (Enumeration e=node.children(); e.hasMoreElements(); ) {
TreeNode n = (TreeNode)e.nextElement();
TreePath path = parent.pathByAddingChild(n);
getPaths(tree, path, expanded, list);
}
}
}
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Related Examples
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e1022. <a class="eglink" href="GetNodes.html?l=rel">
Visiting All the Nodes in a JTree Component
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e1023. <a class="eglink" href="FindNode.html?l=rel">
Finding a Node in a JTree Component
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<br>
e1024. <a class="eglink" href="AddNode.html?l=rel">
Adding a Node to a JTree Component
</a>
<br>
e1025. <a class="eglink" href="RemNode.html?l=rel">
Removing a Node to a JTree Component
</a>
<br>
e1026. <a class="eglink" href="Node2Path.html?l=rel">
Converting a Node in a JTree Component to a TreePath
</a>
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See also:
<a class="eglink" href="/egs/javax.swing.tree/pkg.html?l=rel#Events">
Events
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<a class="eglink" href="/egs/javax.swing.tree/pkg.html?l=rel#Layout">
Layout
</a>
<a class="eglink" href="/egs/javax.swing.tree/pkg.html?l=rel#Node%20Expansion">
Node Expansion
</a>
<a class="eglink" href="/egs/javax.swing.tree/pkg.html?l=rel#Selections">
Selections
</a>
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