请问内联类应该怎么设置变量
先看程序
public String GetFileChooser(String strExt,String strButton,boolean bSave)
  {
  JFileChooser jf = new JFileChooser(".");
  jf.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
  jf.setFileFilter(new javax.swing.filechooser.FileFilter()
  {
  public boolean accept(File f)
  {
  String filePath = f.getAbsoluteFile().toString().toUpperCase();
  if (filePath.endsWith(strExt))
  return true;
  else
  return false;
  }

  public String getDescription()
  {
  return strExt;
  }
  });
  jf.setApproveButtonText(strButton);
  int result = -1;
  if(bSave)
  result = jf.showSaveDialog(null);
  else
  result = jf.showOpenDialog(null);
  if(result == JFileChooser.APPROVE_OPTION)
  return jf.getSelectedFile().getPath();
  else
  return null;
  }

程序指明是strExt变量出错，虽然知道错误的地方，但不知道该如何更正望指教

------解决方案--------------------

Java code

public String GetFileChooser(String strExt,String strButton,boolean bSave)
    
    {
        final String str = strExt;//加上这句.. 内部类要引用外部类的变量..该变量必须是final的.
        JFileChooser jf = new JFileChooser(".");
        jf.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
        jf.setFileFilter(new javax.swing.filechooser.FileFilter() {
            public boolean accept(File f) {
                String filePath = f.getAbsoluteFile().toString().toUpperCase();
                if (filePath.endsWith(str))
                    return true;
                else
                    return false;
            }

            public String getDescription() {
                return str;
            }
        });
        jf.setApproveButtonText(strButton);
        int result = -1;
        if (bSave)
            result = jf.showSaveDialog(null);
        else
            result = jf.showOpenDialog(null);
        if (result == JFileChooser.APPROVE_OPTION)
            return jf.getSelectedFile().getPath();
        else
            return null;
    } 
}