读到缓冲区，BufferedReader

public class IODemo {
public static void main(String[] args) throws IOException {
  //创建一个读取对象和文件相关联
FileReader fr=new FileReader("G:\\dd.txt");
        BufferedReader bufr=new BufferedReader(fr);
   //String s1=bufr.readLine();//一行一行读
   String line=null;
   while((line=bufr.readLine())!=null){
    System.out.println(line);
   }
   bufr.close();

}
}