This application is a simple online calculator that evaluates arithmetic expressions. It only supports +, -, /, =. Other operations are not implemented. So don't try to calculate sin(x) on it.

1. Download and install Java 8 from Oracle
2. Run java -version to make sure that Java is intalled correctly.
3. Should report java version "1.8.xx. If java 1.7 or earlier is reported: 1. Uninstall old java from your computer. 2. Open My Computer - Properties - Additional Properties - System Variables, and specify Java 8 installation folder as JAVA_HOME, e.g. JAVA_HOME = C:\Program Files\Java\jdk1.8.0_91\
4. Download and install Maven from [https://maven.apache.org/].
5. Open My Computer - Properties - Additional Properties - System Variables, and specify Maven installation folder as M2_HOME and as MAVEN_HOME, e.g. MAVEN_HOME = C:\Program Files\Maven
6. Add path to mvn.cmd (e.g. C:\Program Files\Maven\bin) to your path.
7. Run mvn -version to make sure that Maven is intalled correctly.
8. Clone this repository to your local folder, by running git clone https://github.com/supersergey/calculator.git
9. Enter the local folder and type mvn exec:java
10. Open localhost:4567 in your web-browser.
11. You can register or login as a the pre-defined test user. login : admin, password: admin

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Enjoy ;-)