使用FileInputStream类实现将D盘a.jpg复制到E盘目录下

import java.io.*;

/*
          使用FileInputStream类实现将D盘a.jpg复制到E盘目录下
 */
public class Demo {
    public static void main(String[] args) throws IOException {
        InputStream in = new FileInputStream("D://a.jpg");
        OutputStream out = new FileOutputStream("E://a.jpg");
        int len = 0 ;
        byte[] b = new byte[1024 * 10];
        while ((len = in.read(b)) != -1){
            out.write(len);
        }
        out.close();
        in.close();
    }
}