How to convert a mathematical function of type String to a regular function in Java?

Question

Java

There is a mathematical function like String function = "12*x^2-132*x^3" how can such a function be converted so that it can be calculated

Answer 1

Algorithm and its implementation

Answer 2

to make lexical analysis
as a whole they teach at school
more thoroughly with theory they teach at the university in the course of the basics of programming languages, where they learn to write their own programming languages ​​and parse the source code of the program.

Answer 3

Ha, the easiest way is to pick up some kind of interpreted language. For example run this in jython, groovy or even javascript!
In other words. Link your application with your favorite interpreter library and call

BSFManager manager = new BSFManager();
Vector<String> ignoreParamNames = null;
Vector<Integer> args = new Vector<Integer>();
args.add(2);
args.add(5);
args.add(1);
Integer actual = (Integer) manager.apply("groovy", "applyTest", 0, 0,
        "def summer = { a, b, c -> a * 100 + b * 10 + c }", ignoreParamNames, args);
assertEquals(251, actual.intValue());

docs.groovy-lang.org/latest/html/documentation/ind... -
commons.apache.org/proper/commons-bsf/manual.html - scripting language manager
www.groovy-lang.org - groovy itself.
Good luck.