metalluga,

Лучше используй conditional style. Два поля геморрно.

8.7 Creating Style Conditions
You can design your report so that a style changes dynamically. For example, you can set the foreground color of a textfield to
black if a particular value is positive and red when it is negative. iReport creates conditional styles as deriving from an existing
style, for which we set the condition and change some properties.
To apply a condition to a style, right-click the style node and select Add Conditional Style (see Figure 8-14).