readLine

/*通过缓冲区赋值一个.java文件readLine方法只返回回车前面的内容，不返回回车符*/import java.io.*;class BufferedDemo{public static void main(String[] args) {BufferedWriter buffWriter = null;BufferedReader buffReader = null;try{buffWriter = new BufferedWriter(new FileWriter("bufCopy.txt"));buffReader = new BufferedReader(new FileReader("buf.txt"));String line = null;while((line = buffReader.readLine()) != null){buffWriter.write(line);buffWriter.newLine();buffWriter.flush();}}catch (IOException ex){System.out.println(ex.getMessage());}finally{try{if(buffWriter != null){buffWriter.close();}if(buffReader != null){buffReader.close();}}catch (IOException ex){System.out.println(ex.getMessage());}}}}