DefaultTableCellRenderer的问题

Question

修改代码,将getValueAt改成
public Object getValueAt(int rowIndex, int columnIndex) {
   if(columnIndex==1){
      return filename.get(rowIndex);}
   else{
      String ls_name = (filename.get(rowIndex)).toString();
      char c='\\';
      char cc;
      for(int i=ls_name.length() - 1;i>0;i--){
          cc = ls_name.charAt(i);
          if(cc==c){
               ls_name = ls_name.substring(i+1,ls_name.length());
               break;
       }
}
      
return ls_name;
}