Java graphing package?

I don't usually use java, but I need to write an applet that graphs a function with user input. Examples of graphing applets online that I can find use graph.*, but according to javac that package does not exist. Is this true or is java being retarded?

>>2
Truth.
Java should [i]intrinsically[/] know about every package ever written in the Java language, and provide automatic and seamless inclusion to optimize cash flows, maximize profits and lower the Total Cost of Ownership, offering an early Return On Investment by converting casual programmers into ENTERPRISE QUALITY programmers, and creating synergy between every Java package written since the dawn of time[super]1[/super].