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

[adionicio]

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?

[bigalex]

Try expression:

new boolean $F{field_name}<0.0)

[I am Leo]

1st way:
 

java.lang.Double.valueOf($F{field_name}) > java.lang.Double.valueOf("0")[/code]

2nd way:

java.lang.Double.compare(java.lang.Double.valueOf($F{field_name}), java.lang.Double.valueOf("0")) > 0[/code]