Calculator implementation with Apache Wicket in Eclipse.
Features:
• works with numbers of any length (BigDecimal is used to store result);
• can calculate sequence of operations;
• sequentual operations are performed from left to right - not by priority;
• ± button is used to add '-' before negative number, not as negate operation;
• this is CASIO.
Example: 2 + 2 * -2 = -8
calculator.zip contains exploded war ready to deploy to webcontainer like Tomcat.