Generalized input and output

The next program shows how to separate the creation of the input/output streams from the operations to read from and write to such streams.

import java.io.*;
import java.net.*;

public class IOStreams {

  public static void readWrite(InputStream in, OutputStream out)
                                                         throws IOException {
    InputStreamReader isr = new InputStreamReader(in);
    BufferedReader br = new BufferedReader(isr);
    PrintStream ps = new PrintStream(out);
    String line = br.readLine();
    while (line != null) {
      ps.println(line);
      line = br.readLine();
    }
  }

  public static void main(String[] args) throws IOException {
    // Reads from the Internet and writes to a file
    System.out.println("*** Internet -> File ***");
    URL u = new URL("http://www.inf.unibz.it/");
    InputStream net = u.openStream();
    File fout = new File("CShome.html");
    FileOutputStream fileos = new FileOutputStream(fout);
    readWrite(net, fileos);
    fileos.close();

    // Reads from a file and writes to video
    System.out.println("*** File -> Video ***");
    File fin = new File("CShome.html");
    FileInputStream fileis = new FileInputStream(fin);
    readWrite(fileis, System.out);
    fileis.close();
  }
}