jtree

I am developing a small desktop application in Netbeans. I drag and drop a JTree on my JFrame and now i want to fill the node hierarchy of this this JTree dynamically. For this i worte a method which return me DefaultMutableTreeNode object. Now how do i assign this object to the JTree which i drag and drop following example will help you to do it package commondemo; /** * * @author hemant */ import java.awt.*; import javax.swing.*; import javax.swing.tree.*; public class SimpleTree extends JFrame { public static void main(String[] args) { new SimpleTree(); } public SimpleTree() { super(

is it possible to have different colored tree lines between two sibling nodes? I want to show that these two nodes are linked by having a blue line connecting them. However the entire JTree default color is grey or black angled line. Is possible to have partially different colored lines between certain nodes? To change the colours of the lines in the tree, you will need to subclass BasicTreeUI and override at least the 4 methods: paintHorizontalLine paintHorizontalPartOfLeg paintVerticalLine paintVerticalPartOfLeg An example of extending BasicTreeUI can be found here may be import java.awt

I have created a JTree with some of its nodes being custom to show them as expandable although they don't have any children (yet). I have followed this thread to implement that. Why? I want do load the tree dynamically so when the tree gets expanded, I retrieve further information from the server and show it on the tree. The problem I am experiencing is that when I expand one of these nodes, it becomes selected, which is not the default behavior for the default nodes (you can expand them without changing the tree selection). How to solve this to prevent this node to become selected on

I am using dom4j to create a DocumentTreeModel from a dom4j document. I display this DocumentTreeModel inside JScrollPane . I have a button that adds a new node to the dom4j document, and recreates the DocumentTreeModel I am using getPathForRow but this seems pretty limited. I need to be able to work with multiple tree depth. Basically looking for something like tree.getPathOfLastModifiedChildrensParent() onAddNewNodeButtonClickEventFired { dom4jdocument.addElement( "1" ); tree.setModel(new DocumentTreeModel(dom4jdocument)); tree.expandPath(tree.getPathForRow(1)); } Basically I am trying to

I have a Jtree using DefaultTreeModel, each individual node contains a UserObject containing various string fields. I would like to find and select a node by doing a recursive traversal until it finds the DefaultMutableTreeNode with UserObject matching one of it's fields and programmatically select that node. Are there any examples involving searching via DefaultMutableTreeNode's UserObject fields? DefaultMutableTreeNode has depthFirstEnumeration() and breadthFirstEnumeration() . Call the one you desire, iterate through the enumeration until you find the node that has the UserObject you want.

I am working with JTree. I would like to know what is best the way to know which nodes are expanded in a JTree so as to save its state (i.e. save all expanded paths). So that if I call model.reload() the Jtree would not stay collapsed, but I will be able to restore its original state to the user, i.e., all expanded nodes will be expanded. Santhosh Kumar is one of my go-to guys for Swing Hacks. Answer: http://www.javalobby.org/java/forums/t19857.html Thomas Ziegenhein You need to store the TreePaths that were expanded and expand them again after reloading the TreeModel. All TreePaths that have