1
The user can enter a formula in a String type
String formula = (100+20+10)/50*1;
What I need to do is take this formula and do the calculated code to issue a result.
I thought to do with conditions using if or switch case but wanted to know if there is a library in JAVA that does this kind of thing. I explained in a simple way but what I am doing involves saving this formula in a database and after that will contain values to be defined in blank within the formula.
And what is the formula of this operation?
– user28595
It is up to the user to choose the formula.
– joao paulo santos almeida
You have to make a little parser: http://answall.com/q/113578/101. But luckily someone has already answered this in a generic way for any language. I will close as duplicate.
– Maniero
Your doubt is not very clear. If you just do the operation and display, just one
System.out.println((100+20+10)/50*1).– user28595
Missed this question takes only part of what I ask @bigown luckily I found this other question here http://stackoverflow.com/questions/3422673/evaluating-a-math-expression-given-in-string-form that solves my problem. I appreciate your help, man.
– joao paulo santos almeida
@Diegof, it might look like a simple exercise because I’ve simplified as much as possible and it might even be if it were a simple calculator, plus this one for a slightly more complex formula that involves values that are caught depending on what the person types in the formula, type String formula = 2+Pesodophospharo; this weight of the phosphorus is saved in a database and can be modified at any time, not to mention that the user of the system has released to create his calculation formulas in the way he wants. the more I’ve managed to solve my problem thanks.
– joao paulo santos almeida