import java.io.*;

class ScriviUna {
  public static void main(String args[])
  throws IOException {
    FileWriter w;
    w=new FileWriter("scrittura.txt");

    BufferedWriter b;
    b=new BufferedWriter (w);

    b.write("abcd\nefghi");

    b.write("123");

    b.flush();
  }
}