Source Code : Expand JTree

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Expand JTree

     

//package com.micrometa.km.ui.util;

import java.util.Enumeration;

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

public class TreeUtil {
  public static void expandAll(JTree tree, boolean expand) {
    TreeNode root = (TreeNode) tree.getModel().getRoot();
    // Traverse tree from root
    expandAll(tree, new TreePath(root), expand);
  }

  public static void expandAll(JTree tree, TreePath parent, boolean expand) {
    // Traverse 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);
        expandAll(tree, path, expand);
      }
    }
    // Expansion or collapse must be done bottom-up
    if (expand) {
      tree.expandPath(parent);
    } else {
      tree.collapsePath(parent);
    }
  }
}

   
    
    
    
    
  

Thank with us