I have add project to NetBeans.
I used in processing and it was good.

1. PImage img;
2. public void setup()
3. {
4.   size(640,360);
5.   img = loadImage("Grumpy.jpg");
6.  
7.   }
8. public void draw()
9. {
10.    image(img,0,0);
11. }

  Now I created Interface and need to load  "Grumpy.jpg" to JFrame
Wrote in this way in Interface.class

1. public class Interface extends javax.swing.JFrame {
2. PImage img;
3.     /**
4.      * Creates new form Interface
5.      */
6.     public Interface() {
7.        initComponents();
8.        MyGrumpy setup = new MyGrumpy();
9.        setup.loadImage("Grumpy.jpg");
10.        MyGrumpy draw = new MyGrumpy();
11.       draw.image(img,20,20,640,360);
12.      }

But got
Error:

1. Exception in thread "main" java.lang.NullPointerException
2.     at processing.core.PApplet.image(PApplet.java:12258)
3.     at grumpy.Interface.<init>(Interface.java:24)
4.     at grumpy.Grumpy.main(Grumpy.java:14)

Please, help