This is arithmetic expression calculater. For e.g you have an expression like (a + b) * 100. Based upon value of a & b this will give the answer. For more details you can refer to Test.java file.

Note: you can try out any complex formula.

Sample code:

    Map<String, BigDecimal> data = new HashMap<>();
    data.put("a", BigDecimal.valueOf(100));
    data.put("b", BigDecimal.valueOf(2));
    data.put("c", BigDecimal.valueOf(12));
    data.put("d", BigDecimal.valueOf(14));
    data.put("e", BigDecimal.valueOf(6));
    System.out.println("a * ( b + c ) / d  ==>"+ExpressionParser.init("a * ( b + c ) / d").evaluate(data).getData());


    System.out.println("a * ( b + c )   ==>"+ExpressionParser.init("a * ( b + c)").evaluate(data).getData());


    System.out.println("a +  b  * e  ==>"+ExpressionParser.init("a +  b  * e").evaluate(data).getData());


    System.out.println("(c - b) * 100.1  ==>"+ExpressionParser.init("(c -  b) * 100.1").evaluate(data).getData());

Output:

    a * ( b + c ) / d  ==>100
    a * ( b + c )   ==>1400
    a +  b  * e  ==>112
    (c - b) * 100.1  ==>1001.0