java - 在文件选择器中禁用“新建文件夹”按钮无法正常工作

Question

我使用以下代码禁用新文件夹按钮:

 public void disableNewFolderButton( Container c ) {

     System.out.print("in disable fn");
int len = c.getComponentCount();
for (int i = 0; i < len; i++) {
  Component comp = c.getComponent(i);
  if (comp instanceof JButton) {
    JButton b = (JButton)comp;
    Icon icon = b.getIcon();
    if (icon != null
         && icon == UIManager.getIcon("FileChooser.newFolderIcon"))
    {
        System.out.print("in disable fn");
       b.setEnabled(false);
    }
    }
  else if (comp instanceof Container) {
    disableNewFolderButton((Container)comp);
  }
}
 }

代码在以下几行中被调用:

   JFileChooser of=new JFileChooser();
    of.setAcceptAllFileFilterUsed(false);
    of.addChoosableFileFilter(new MyFilter());
    disableNewFolderButton(of);

但仅当文件选择器首次显示时，新文件夹按钮才会被禁用。假设我转到某个驱动器，例如 g: ，然后该按钮再次启用。如何正确设置？

Answer 1

这对我有用......

    //Create a file chooser
UIManager.put("FileChooser.readOnly", Boolean.TRUE); 
JFileChooser fc = new JFileChooser();