Splash no jFram

public class principal extends javax.swing.JFrame {

  
   HiloProgreso hilo;
    public principal() {
        initComponents();
       iniciarSplash();

   hilo=new HiloProgreso(progreso);
   hilo.start();
   this.setLocation(250,300);
   this.setSize(250,300);
    
hilo=null;
    }
    public void iniciarSplash(){
        getProgreso().setBorderPaited(true);
        getProgreso().setForeground(new Color(50,50,153,100));
        getProgreso().setStringPaited(true);
    }