How to choice line type in JTree

Question

hi
the line in my JTree is dashed, could you help me to change it to real line?
thx so much

Answer 1

I do not think so, sir.
Under Windows LAF, I can find solid line type JTree, but I really do not know why line type in My JTree is dashed;
Please look at the following: (this is solid version with window Look and Feel)
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.UIManager;
import javax.swing.JTree;
import javax.swing.tree.*;
import java.awt.GridLayout;
public class TreeDemo extends JPanel{
    private JTree tree;
    private static boolean DEBUG = false;
    //Optionally play with line styles.  Possible values are
    //"Angled" (the default), "Horizontal", and "None".
    private static boolean playWithLineStyle = false;
    private static String lineStyle = "Horizontal";
    //Optionally set the look and feel.
    private static boolean useSystemLookAndFeel = false;
    public TreeDemo() {
        super(new GridLayout(1,0));      
        //Create a tree that allows one selection at a time.
        tree = new JTree();
        tree.getSelectionModel().setSelectionMode
                (TreeSelectionModel.SINGLE_TREE_SELECTION);
        //Create the scroll pane and add the tree to it.
        JScrollPane treeView = new JScrollPane(tree);     
          add(treeView);
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
    private static void createAndShowGUI() {
         try{
               UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
          }catch(Exception e){
        if (useSystemLookAndFeel) {
            try {
                UIManager.setLookAndFeel(
                    UIManager.getSystemLookAndFeelClassName());
            } catch (Exception e) {
                System.err.println("Couldn't use system look and feel.");
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);
        //Create and set up the window.
        JFrame frame = new JFrame("TreeDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //Create and set up the content pane.
        TreeDemo newContentPane = new TreeDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
}