自定义readLine

class MyBufferedReader{private FileReader fileReader;public MyBufferedReader(FileReader fileReader){this.fileReader = fileReader;}public String myReadLine(){try{StringBuffer sb =new StringBuffer();int ch = 0;while((ch = fileReader.read()) != -1){if(ch == '\r')continue;if(ch == '\n')return sb.toString();elsesb.append((char)ch);}if(sb.length() != 0){return sb.toString();}return null;}catch (IOException ex){ex.getMessage();}}public void myClose(){try{fileReader.close();}catch (IOException ex){ex.getMessage();}}}