JTree root cannot be removed with removeNodeFromParent(), use DefaultTreeModel.setRoot() to remove the root : JTree Node « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JTree Node

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeModel;

public class TreeRootRemove {
  public static void main(String[] argv) {
    JTree tree = new JTree();
    DefaultTreeModel model = (DefaultTreeModel) tree.getModel();

    model.setRoot(null);

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(new JScrollPane(tree));
    frame.setSize(380, 320);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
}

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 Tree
	14.67.6.	Swing 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