FileReader类 示例

//Demonstrate FileReader.
import java.io.*;
class FileReaderDemo{
 public static void main(String[] args) throws Exception{
  FileReader fr = new FileReader("FileReaderDemo.java");
  BufferedReader br = new BufferedReader(fr);
  String s;
  while((s=br.readLine())!=null){
   System.out.println(s);
  }
  fr.close();
 }
}