This tutorial builds on the Numerical Expression Solver tutorial, adding textual variables such as “e” or “pi”, and custom ones. Then you will create an applet that takes advantage of this new functionality by creating a graphical representation of an arbitrary expression at each point in space. Continue reading →

This tutorial will show you how to write a Java program that takes a string input such as “3 + 4^2*7.5E-1*sin(22)” and convert it into a numerical answer, 2.893784 in this case, which you can use for whatever purpose you like. Continue reading →