Variable subtraction, graphing

[dtrobert]

 Hi,

 I am plotting % Free Memory over time for servers and it works fine.  I would like to instead plot the inverse (% Used Memory) over time.  

I have a timeseries chart with value expression a variable $V{averageMem} defined as a java.lang.Integer.  

I figured I could just do this

new java.lang.Integer( 100 -($V{averageMem}.intValue()) )

to plot the inverse but no joy.  Instead, I get this error 

Cannot cast from int to Integer value = (java.lang.Integer)(100)

 

Any suggestions?

Thanks

[rreganjr]

new java.lang.Integer( new java.lang.Integer(100).intValue() -($V{averageMem}.intValue()) )