How hard can it be to write a simple four-function calculator program? After all, computers are good at math, and making a calculator isn’t exactly blazing a new trail, right?

Want to learn to code and write your first Java program? Here's a quick and fun Java programming tutorial that will have your running your first Java program in less than 10 minutes.

How to run a Java program using Command Prompt First things first, you will have to write the code that you want to run and save that as a Java executable file.