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+%0A%EF%BB%BF/*%0A *   Crosso Scientific Calculator%0A *   hint this code under ApacheLicense%0A */%0A%0A%0A%0A%EF%BB%BFpackage com.crosso;%0A%0A/**%0A * %0A * @author Ibrahim Abdsaid Hanna %0A *         ibrahim.seniore@gmail.com%0A */%0A%0A%0Apublic class Const %7B%0A    static String ERROR=%22Error%22;%0A%0A%7D%0A

Create Const.java