gistfile1.txt

import java.io.*;

class Hoge {
    public static void main(String[] args) throws Exception {
        try (BufferedInputStream  is = new BufferedInputStream( new FileInputStream(new File("/tmp/hoge")));
             BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(new File("/tmp/foo")))) {
            int length = 0;
            byte[] buffer = new byte[1024];
            while ((length = is.read(buffer)) >= 0) {
                System.out.write(buffer, 0, length);
                os.write(buffer, 0, length);
            }
        }
        System.out.println("Done.");
    }
}