This week's book giveaways are in the Java EE and JavaScript forums.
We're giving away four copies each of The Java EE 7 Tutorial Volume 1 or Volume 2(winners choice) and jQuery UI in Action and have the authors on-line!
See this thread and this one for details.
The moose likes Beginning Java and the fly likes Need sample java code Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of The Java EE 7 Tutorial Volume 1 or Volume 2 this week in the Java EE forum
or jQuery UI in Action in the JavaScript forum!
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "Need sample java code" Watch "Need sample java code" New topic
Author

Need sample java code

S Srikanth
Greenhorn

Joined: Sep 09, 2002
Posts: 14
Hi,
I have a scenario as follows.

I have a formula say F1+F2+F3.
Where..
F1 = B1+B2
F2 = F6+B3
F3 = B4
F6 = F7+B5
F7 = B6

After substitution of these values my formula becomes B1+B2+B3+B4+B5+B6.

Like this there can be multiple levels of substitution. How to handle these kind of situations in a java program.

In Brief,
I need to write a java function which takes F1+F2+F3 as input and which gives B1+B2+B3+B4+B5+B6 as output.

Regds,
Srikanth
Ernest Friedman-Hill
author and iconoclast
Marshal

Joined: Jul 08, 2003
Posts: 24183
    
  34

Briefly, you need a parser which parses expressions into a tree structure, then evaluates/simplifies the tree, and then prints (or otherwise reports) the tree. The details are covered in any introductory book on compiler or parser writing, or the help docs for many "compiler-compilers" like ANTLR.


[Jess in Action][AskingGoodQuestions]
 
wood burning stoves
 
subject: Need sample java code