JCheckBox used in a JTree Displaying Wrong

Question

I have a class that creates a JTree and sets the node to a JCheckBox. The checkboxes appear fine except for the fact that instead of the JCheckBoX name appearing next to the actual checkbox the JCheckBox values appear instead. I found a topic in the the forum that touches this problem but gives no solution.
If someone could tell me what i am doing wrong that would be great! Any help would be appreciated. My class is posted below......
package rateformapplet;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.ArrayList;
import java.util.EventObject;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.*;
public class TreeSections extends JPanel implements TreeSelectionListener
  DefaultMutableTreeNode mainSection = null;
  private JTree jt;
  public TreeSections(Object[][] ro)
    DefaultMutableTreeNode top = new DefaultMutableTreeNode("Select The Main Section then Applicable Sub Section(s)");
    createNodes(top,ro); //setup the tree nodes
    //setup Tree values
    jt = new JTree(top);
    jt.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
    jt.setSize(300,200);
    jt.setShowsRootHandles(true);
    JScrollPane treeView = new JScrollPane(jt);
    this.add(treeView);
    this.setVisible(true);
    TreeCR cr = new TreeCR();
    jt.setEditable(true);
    jt.setCellRenderer(cr);
  }//end constructor
  //below is a method of the TreeCellRenderClass
  class TreeCR implements TreeCellRenderer
  public Component getTreeCellRendererComponent(JTree tree,Object obj1,
                                                boolean isSelected, boolean expanded,
                                                boolean leaf, int row, boolean hasFocus)
    DefaultMutableTreeNode temp = (DefaultMutableTreeNode) obj1;
    //JCheckBox temp2=(JCheckBox)temp.getUserObject();
    JCheckBox x = new JCheckBox(temp.getUserObject().toString());
    return x;
  }//public Component getTreeCellRendererComponent(JTree...........
  private void createNodes(DefaultMutableTreeNode top, Object[][] sections)
    //DefaultMutableTreeNode mainSection = null;
    DefaultMutableTreeNode subSection = null;
    for (int c = 0; c < sections.length; c++)
      mainSection = new DefaultMutableTreeNode(new JCheckBox(sections[c][0].toString()),true);
      top.add(mainSection);
      for (int p = 0; p < sections[c].length; p++)
        subSection = new DefaultMutableTreeNode(new JCheckBox(sections[c][p].toString()),true);
        mainSection.add(subSection);
  }//end create node
}//end class TreeSectionsThanks in advance
Chris

Answer 1

Perhaps this will help somebody.
When you fill in the nodes (in createNodes), it is not necessary to provide a JCheckBox for each one; just an object whose toString() method will provide the text to the nodes.
When rendering each cell, set the corresponding text to the JCheckBox.
I rewrite the TreeCR class and createNode method of the above example, taking this into account:
  class TreeCR implements TreeCellRenderer
    private checkBox = new JCheckBox();
    public Component getTreeCellRendererComponent(JTree tree, Object value,
                                                  boolean isSelected, boolean expanded,
                                                  boolean leaf, int row, boolean hasFocus)
      DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
      checkBox.setText(node.getUserObject().toString());
      checkBox.setSelected(isSelected);
      return checkBox;
  private void createNodes(DefaultMutableTreeNode top, Object[][] sections)
    DefaultMutableTreeNode mainSection = null;
    DefaultMutableTreeNode subSection = null;
    for (int c = 0; c < sections.length; c++)
      mainSection = new DefaultMutableTreeNode(sections[c][0]);  // without JCheckBox
      top.add(mainSection);
      for (int p = 0; p < sections[c].length; p++)
        subSection = new DefaultMutableTreeNode(sections[c][p]); // without JCheckBox
        mainSection.add(subSection);
  }//end create node