Javadoc
Sets the minimum bar length and sends a
RendererChangeEvent to
all registered listeners. The minimum bar length is specified in Java2D
units, and can be used to prevent bars that represent very small data
values from disappearing when drawn on the screen. Typically you would
set this to (say) 0.5 or 1.0 Java 2D units. Use this attribute with
caution, however, because setting it to a non-zero value will
artificially increase the length of bars representing small values,
which may misrepresent your data.