This programm does not work without the command line. The JAR file is pointless because of this, but this was a school project and making an executable JAR file was required.
The first thing you will see in this programm is a message: "What Would You Like To Do?" There are two valid inputs after this: "Calculate" and "Base Conversion" Each of these options are self-explanatory.
When inputing expressions to be calculated, separate numbers and operators with spaces as shown below: 86 * B9 - s2 =
The programm works for bases 2 to 62, with numbers first, then uppercase letters, then lowercase letters.