public class TestIO {

 public static void main(String[] args) throws IOException {

  FileInputStream fis = new FileInputStream("c:/abc.txt");// 字节流

  InputStreamReader isr = new InputStreamReader(fis);// 字符流

  BufferedReader br = new BufferedReader(isr);// 缓冲流

  String str = null;

  if ((str = br.readLine()) != null) {

   System.out.println(str);

  }

  br.close();

  isr.close();

  fis.close();

 }

}

public class TestIO {

public static void main(String[] args) throws IOException {

FileReader fr = new FileReader("c:/abc.txt");

  BufferedReader br = new BufferedReader(fr);// 缓冲流

  String str = null;

  if ((str = br.readLine()) != null) {

   System.out.println(str);

  }

  fr.close();

  br.close();

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