Vim-Style Java Calculator

A terminal calculator with Vim-style navigation (h/j/k/l) supporting basic arithmetic (+, -, *, /).

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Quick Start

Run from .jar

javac main.java        # compile if needed
java -jar main.jar     # run

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Run with Docker

docker build -t calc-app .
docker run -it calc-app

Example Dockerfile:

FROM openjdk:21-slim
WORKDIR /app
COPY main.jar .
CMD ["java", "-jar", "main.jar"]

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Run with Nix Flakes

# Build with flakes
nix --extra-experimental-features nix-command --extra-experimental-features flakes build .#calc-app

# Run the calculator
./result/bin/calc

Controls

h = move left

l = move right

k = move up

j = move down

Enter = select number/operator

x = delete last input

q = quit

Errors (invalid input or divide by zero) are highlighted in red.