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






  1. Java
  2. Swing JFC
  3. Tree

JTree root cannot be removed with removeNodeFromParent(), use DefaultTreeModel.setRoot() to remove the root

    

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);
  }
}








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