问使用新值刷新JTextArea

EN

try {
            //use buffering, reading one line at a time
            //FileReader always assumes default encoding is OK!
            BufferedReader input =  new BufferedReader(new FileReader("RokFile.txt"));
            try {
                String line = null; //not declared within while loop

                while (( line = input.readLine()) != null){
                    jTextArea1.append(line+"\n");
                }
            }
            finally {
                input.close();

            }
        }
        catch (IOException ex){
            ex.printStackTrace();
        }