Back in 10th grade we had a little introduction to Java Swing by drawing a few rectangles. In class I then asked my teacher for a cool project I could do at home to improve my skills. He suggested creating a Calculator. This was the origin of V1 of this project.

V1 brings basic functionality of a calculator. Though it lacks "Punkt- vor Strichrechnung" (PEMDAS) it brings a few handy number converters with it. Of course my teacher suggested me to add PEMDAS rules as advanced task.

V2 then added PEMDAS rules and also automatically showed the user which buttons can be pressed and disabled all others. Though the coloring for this feature seems broken. V2 was implemented using a Stack for storing and decoding the calculation.

When you review the code and probably can't believe how "good" it's structure and quality is, please remember that I wrote this code long ago as one of my first ever projects. For the authenticity I don't wanted to change anything. Even if that means the code isn't perfect, it's at least authentic. Unfortunately it's not bug free. Can you find them?🪲