Math in Java

[Kamrua]

Is there any function that can do something like this?

crappy = THEFUNCTION(777/111-3);
System.out.println(crappy);

And then comess out as:

4

[nullsquared]

[QUOTE=Kamrua;19664701]Is there any function that can do something like this?

crappy = THEFUNCTION(777/111-3);
System.out.println(crappy);

And then comess out as:

4

[/QUOTE]

System.out.println(777/111-3);

[Kamrua]

[QUOTE=nullsquared;19664717]System.out.println(777/111-3);[/QUOTE]
Lets say a user can input their own calculation.

EDITED: Blahh, I'm stupid. Got it.

[Borsty]

You want to either write or use a mathematical equations parser / evaluator

Like [url=http://www.singularsys.com/jep/]JEP[/url]

Or take a look at these:
[url]http://www.fileguru.com/Math-Expression-Parser---JbcParser-For-Java/info[/url]
[url]http://www.jguru.com/faq/view.jsp?EID=480122[/url]

[Kamrua]

[QUOTE=Borsty;19664831]You want to either write or use a mathematical equations parser / evaluator

Like [URL="http://www.singularsys.com/jep/"]JEP[/URL]

Or take a look at these:
[URL]http://www.fileguru.com/Math-Expression-Parser---JbcParser-For-Java/info[/URL]
[URL]http://www.jguru.com/faq/view.jsp?EID=480122[/URL][/QUOTE]
Alright thanks. I have another question though.. How can I add one letter to a string one at a time? Let's say a button is pressed... If this button is pressed once, String lol = "f";
if it is pressed twice, String lol = "ff";... etc. You know what I mean?

[B1N4RY!]

Use Scanner

Scanner input= new Scanner(System.in);
    int first = input.nextInt();
    int second = input.nextInt();
    System.out.println(first/second);

[NovembrDobby]

lol += "f";

[Kamrua]

Thanks @above, worked great.

[Robber]

You should use a StringBuilder instead. String creates a new object everytime you concatenate, while StringBuilder was made for what you want to do.

[tjl]

-whoops, my bad-

[NukePower]

[QUOTE=Robber;19666259]You should use a StringBuilder instead. String creates a new object everytime you concatenate, while StringBuilder was made for what you want to do.[/QUOTE]

This is very true; although only recommended for 3+ concatenations. That's about the magic number by most benchmarks. Also you have to admit for just 2 concatenations it's a lot of boilerplate.