我创建了一个以下渲染器，它使用图标和文件夹列表渲染 JTree。我想为该部分的背景添加不同的颜色。我尝试将它提供给面板，但是 Jtree 是……

我创建了一个以下渲染器，它使用图标和文件夹列表渲染 JTree。我想为该部分的背景添加不同的颜色。我尝试将它提供给面板，但 Jtree 位于左面板上方，因此无法应用。我该怎么办？请帮助我。提前谢谢您。

这是我想要灰色背景颜色的 ss[1]: https://i.sstatic.net/OlO9Y7J1.png

我需要修改的代码一览

DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer() {
            private final ImageIcon mainFolderIcon = new ImageIcon(getClass().getResource(strings.getString("folder_icon")));
            private final ImageIcon folderIcon = new ImageIcon(getClass().getResource(strings.getString("folder_icon")));

            // Scale the image to the desired size
            ImageIcon originalIcon = new ImageIcon(getClass().getResource(strings.getString("right_arrow_icon")));
            int width = 20;  // Width in pixels
            int height = 20; // Height in pixels
            // Scale the image to the desired size
            Image scaledImage = originalIcon.getImage().getScaledInstance(width, height, Image.SCALE_SMOOTH);
            // Create a new ImageIcon with the scaled image
            ImageIcon arrowIcon = new ImageIcon(scaledImage);

            private final int VERTICAL_GAP = 5; // Adjust this value as needed

            @Override
            public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) {
                JLabel label = (JLabel) super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
                label.setFont(new Font("Roboto", Font.PLAIN, 14)); // Increase font size of file name

                DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
                boolean isMainFolder = (node.getParent() == null);
 // Set the custom cell renderer for the tree
        tree.setCellRenderer(renderer);

        // Add a tree selection listener to handle folder selections
        tree.addTreeSelectionListener(new TreeSelectionListener() {
            @Override
            public void valueChanged(TreeSelectionEvent e) {
                // Get the selected node
                DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();

                // Check if it is a folder node
                if (selectedNode != null && selectedNode.isLeaf()) {
                    // Perform the desired action for folder selection
                    String folderName = selectedNode.getUserObject().toString();
                    int position = selectedNode.getParent().getIndex(selectedNode);
                    System.out.println("Folder selected: " + folderName);
                    System.out.println("Position: " + position);
                    DriveFile driveFile1 = folderLeftList.get(position);
                    if (!breadcrumbTrail.contains(driveFile1)) {
                        breadcrumbTrail.add(driveFile1);
                    }

                    // Create a new renderer component with white text color
                    DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
                    JLabel label = (JLabel) renderer.getTreeCellRendererComponent(tree, selectedNode, false, false, true, position, false);
                    label.setForeground(Color.WHITE);
                    // Repaint the tree to update the text color
                    tree.repaint();

                    new FileManagerController(drive, username, role, context, cookieStore, dashboardView, listDriveNames, 23, driveFile1, fileManagerView, null, null, null, null, null, null, null, null, null, password, null, 0, null, null, mapDrives, null, null, loginForm, null, null, null, isListView, null);
                }
            }
        });

        leftPanel.setBackground(Color.WHITE); // Set the desired background color
        leftPanel.setBorder(null); // Removes any border set on the panel
        leftPanel.add(new JScrollPane(tree), BorderLayout.CENTER);

• jtreetable