Adding a Node to a JTree Component - Java Swing

Java examples for Swing:JTree

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Description

Adding a Node to a JTree Component

Demo Code

import javax.swing.JTree;
import javax.swing.text.Position;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreePath;

public class Main {

  public void m() {
    JTree tree = new JTree();
    DefaultTreeModel model = (DefaultTreeModel) tree.getModel();

    // Find node to which new node is to be added
    int startRow = 0;
    String prefix = "J";
    TreePath path = tree.getNextMatch(prefix, startRow, Position.Bias.Forward);
    MutableTreeNode node = (MutableTreeNode) path.getLastPathComponent();

    // Create new node
    MutableTreeNode newNode = new DefaultMutableTreeNode("green");

    // Insert new node as last child of node
    model.insertNodeInto(newNode, node, node.getChildCount());
  }//from ww w. j  av  a2s . co m
}

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