Expanding or Collapsing All Nodes in a JTree Component : JTree Node « Swing « Java Tutorial

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Java Tutorial » Swing » JTree Node 
14. 67. 13. Expanding or Collapsing All Nodes in a JTree Component
import java.util.Enumeration;

import javax.swing.JTree;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

public class Main {
  public void expandAll(JTree tree) {
    TreeNode root = (TreeNodetree.getModel().getRoot();
    expandAll(tree, new TreePath(root));
  }

  private void expandAll(JTree tree, TreePath parent) {
    TreeNode node = (TreeNodeparent.getLastPathComponent();
    if (node.getChildCount() >= 0) {
      for (Enumeration e = node.children(); e.hasMoreElements();) {
        TreeNode n = (TreeNodee.nextElement();
        TreePath path = parent.pathByAddingChild(n);
        expandAll(tree, path);
      }
    }
    tree.expandPath(parent);
    // tree.collapsePath(parent);
  }
}
14. 67. JTree Node
14. 67. 1. Get child count, depth, leaf count
14. 67. 2. Adding a Node to a JTree Component
14. 67. 3. Delete tree node
14. 67. 4. Removing a Node to a JTree Component
14. 67. 5. Expression TreeExpression Tree
14. 67. 6. Swing TreeSwing Tree
14. 67. 7. JTree node mouse click event
14. 67. 8. A JTree subclass that displays the tree of AWT or Swing component that make up a GUI
14. 67. 9. Tree with custom icon
14. 67. 10. CheckBox Tree node
14. 67. 11. Get path for all expanded or not expanded tree pathes
14. 67. 12. Converting All Nodes in a JTree Component to a TreePath Array
14. 67. 13. Expanding or Collapsing All Nodes in a JTree Component
14. 67. 14. JTree root cannot be removed with removeNodeFromParent(), use DefaultTreeModel.setRoot() to remove the root
14. 67. 15. Searching node in a JTree
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