To begin, let's create a new project in NetBeans. I'm going to call mine Variables, and this time we'll allow NetBeans to create the main class for us so that we can get to coding as quickly as possible. We need to delete all the comments that are created automatically by NetBeans when we create our new project, just to keep everything as readable as possible, then we'll be good to go:
The first computers were little more than calculators, and Java, of course, retains this functionality. For example, Java can evaluate 1+1, which will evaluate to 2, of course. However, Java is pretty complicated and designed to do a lot of different things, so we need to provide context to our commands. Here, we tell Java that we'd like it to print the result of 1+1:
package variables;
public class Variables {
public static void main(String...
