The getFont, getForeground, getBackground, getMaximumSize,
getMinimumSize and getPreferredSize methods in JComponent
have semantics that make it impossible to fully interpret
the values they return. The problem is that they return
the apporpiate property value only when it is non-null.

When the property value is null the methods invoke routines
to manufacture a suitable default. While these semantics are
appropriate for general GUI programming, they make it impossible
for an introspector, as would be used in an IDE, to access the
true values of these properties.

Add these:

JComponent::

        public boolean isMinimumSizeSet()
        public boolean isPreferredSizeSet()
        public boolean isMaximumSizeSet()

Component::

        public boolean isFontSet()
        public boolean isBackgroundSet()
        public boolean isForegroundSet()
        public boolean isCursorSet()