bufferediostreamexam.java

来自「Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程」· Java 代码 · 共 21 行

import java.io.*;
public class BufferedIOStreamExam {
  public static void main(String[] args) throws IOException {
    try {
      //建立指向a.txt文件的输入流
      BufferedInputStream bIn = new BufferedInputStream(new FileInputStream("a.txt"));
      //建立指向b.txt文件的输出流
      BufferedOutputStream bOut = new BufferedOutputStream(new FileOutputStream("b.txt"));
      System.out.println("文件大小:" + bIn.available());
      byte b[] = new byte[bIn.available()];
      bIn.read(b);
      bOut.write(b);
      System.out.println("file copyed and renamed");
      bIn.close(); ;
      bOut.close();
    }
    catch (Exception e) {
      System.err.println("Error: " + e.toString());
    }
  }
}