java - Eclipse WindowBuilder: Ignore runtime paint() code -

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this question has answer here:

one of jpanels in swing gui designing uses awt graphics drawing figures drawable @ runtime. eclipse windowbuilder no longer wants draw of swing gui there null pointer exceptions in awt paint code. note not generic question null pointer exceptions. specific windowbuilder , how handle code doesn't make sense in context of windowbuilder. there method ignore awt paint code if windowbuilder trying interpret swing gui?

import java.awt.color; import java.awt.graphics; import java.awt.image.bufferedimage;  import javax.swing.jpanel;  public class previewpanel extends jpanel { private static final long serialversionuid = 3787425749772291816l; public final static int width = 918; public final static int height = 125;  public void paint(graphics g) {     bufferedimage img = new bufferedimage(width, height, bufferedimage.type_3byte_bgr);     graphics gbuffer = img.getgraphics();     gbuffer.setcolor(color.white);     gbuffer.fillrect(0, 0, width, height);      businessclass.object.paint(gbuffer);      g.drawimage(img, 0, 0, this);      try {         thread.sleep(20);     } catch (exception e) {     }     repaint(); }

in particular example, previewpanel embedded inside of overall swing gui working in windowbuilder , businessclass.object initialized @ runtime (main invokes initialization of businessclass, not gui itself). have shown 1 example, there many other cases call painting code of runtime object or list of objects need drawn awt graphics.

i found workaround wrapping run time code in null pointer check against businessclass singleton. windowbuilder won't pass check, code skipped over. it's dirty solution. hoping compile flags or whatnot.





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