[How can I change field background color based on percentage?]

this what i have currently

[How can I change field background color based on percentage?]

Hello, I'm trying to make a report that fills the background color of a field based on percentage, I have managed to do something similar using styles and ended up with something like the image below, how can I fill the field for section progressively? I want to end up with something more similar like a progress bar.

[How can I implement a progress bar in Jasper?]

Thank you vchien, I will se what i can do then

[How can I implement a progress bar in Jasper?]

Hello there, is it possible to implement a progress bar chart in jasper, I saw that there's a Radio Progress chart but im looking for something more like this:

[How do I determine if a Double is greater than zero in jasper?]

Hello there, im trying to set a style that activates if the value of the field is less or greater than zero, I have tried doing something like this $F{field_name} > 0.0, but its says that operator "<" is undefined, I also tried something like  new Double($F{field_name}.doubleValue() >0.00) but then it says  The constructor Double(boolean) is undefined, can someone help me?