import java.io.FileOutputStream;
import java.util.prefs.Preferences;
public class Main {
public static void main(String[] argv) throws Exception {
Preferences prefs = Preferences.userNodeForPackage(String.class);
// Save some values
prefs.put("myString", "a string"); // String
prefs.putBoolean("myBoolean", true); // boolean
prefs.putInt("myInt", 123); // int
prefs.putLong("myLong", 123L); // long
prefs.putFloat("myFloat", 12.3F); // float
prefs.putDouble("myDouble", 12.3); // double
byte[] bytes = new byte[10];
prefs.putByteArray("myByteArray", bytes); // byte[]
// Export the node to a file
prefs.exportNode(new FileOutputStream("output.xml"));
}
}