Java tutorial
import java.io.DataOutputStream; import java.io.File; import java.io.FileOutputStream; public class Main { public static void main(String[] args) { String destFile = "primitives.dat"; try (DataOutputStream dos = new DataOutputStream(new FileOutputStream(destFile))) { dos.writeInt(765); dos.writeDouble(6789.50); dos.writeBoolean(true); dos.writeUTF("Java Input/Output is cool!"); dos.flush(); System.out.println("Data has been written to " + (new File(destFile)).getAbsolutePath()); } catch (Exception e) { e.printStackTrace(); } } }