Detect design time in NetBeans

When using the Swing graphical editor in NetBeans is it possible for a custom component to detect that it's design time? E.g.

public CustomComponent() {
    initComponents();

    if (!isDesignTime()) {
        someIcon = IconFactory.loadIcon("icons/SomeIcon.png");
    }
}

Basically I'm after something like .net's Compo开发者_开发技巧nent.DesignMode

Try:

java.beans.Beans.isDesignTime()