Prototype Calculator

Building a simple Calculator in Java.

Explanation of approach

Using an interface "Operation" with a hashmap based OperationFactory ensures that its easy to add more operations. The main method builds the Calculate class that performs the calculation and prints the result.

Prerequisites

java 1.6+ and ant

I compiled and tested it using Netbeans.

Build

ant

Test

ant test

Run

ant
java -jar dist/ecalc.jar 4 x 4