Help on how to catch the last word of a string and add to the beginning using java

[shizuka]

I have a full name: Jais Pereira Godofre

The example below, I get the last word, but how do to print with this result: Godofredo, Jais Pereira Guedes

public class Aula1{
/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    // TODO code application logic here
    String nomeCompleto = "Jais Pereira Guedes Godofredo";
    String[] split = nomeCompleto.split(" ");
    String resultado = split[split.length - 1];
    System.out.println(resultado );
}

}

[Mystic]

    String sentenca = "Jais Pereira Guedes Godofredo";
    int index= sentenca.lastIndexOf(" ");
    String restoSentenca = (sentenca.substring(0, index));
    String ultimaPalavra = (sentenca.substring(index+1));
    String novaSentenca = ultimaPalavra + ", " + restoSentenca;
    System.out.println(novaSentenca);

https://ideone.com/3MqVsr