Janino 2.7.8
Free Version
Publisher Description
Janino is a super-small, super-fastcompiler that reads a Java expression, block, or source file, and generates Java bytecode that is loaded and executed directly. It is not intended to be a development tool, but an embedded compiler for run-time compilation purposes, such as expression evaluators or "server pages" engines like JSP.
Properties
The major design goal was to keep the compiler small and simple, while partially sacrificing completeness. I don't like the idea of carrying around huge libraries for simple applications. See Parser for the list of implemented and missing language features.
When do you need an efficient expression evaluator?
Say you build an e-commerce system, which computes the shipping cost for the items that the user put into his/her shopping cart. Because you don't know the merchant's shipping cost model at implementation time, you could implement a set of shipping cost models that come to mind (flat charge, by weight, by number of items, ...) and select one of those at run-time.
In practice, you will most certainly find that the shipping cost models you implemented will rarely match what the merchant wants, so you must add custom models, which are merchant-specific. If the merchant's model changes later, you must change your code, re-compile and re-distribute your software.
Because this is so unflexible, the shipping cost expression should be specified at run-time, not at compile-time. This implies that the expression must be scanned, parsed and evaluated at run-time, which is why you need an expression evaluator.
A simple expression evaluator would parse an expression and create a "syntax tree". The expression "a + b * c", for example, would compile into a "Sum" object who's first operand is parameter "a" and who's second operand is a "Product" object who's operands are parameters "b" and "c". Such a syntax tree can evaluated relatively quickly. However, the run-time performance is about a factor of 100 worse than that of native Java code.
About Janino
Janino is a free software published in the Other list of programs, part of Development.
This program is available in English. It was last updated on 03 April, 2024. Janino is compatible with the following operating systems: Linux, Mac, Other, Unix, Windows.
The company that develops Janino is Arno Unkrig. The latest version released by its developer is 2.7.8. This version was rated by 6 users of our site and has an average rating of 2.7.
The download we have available for Janino has a file size of 1.05 MB. Just click the green Download button above to start the downloading process. The program is listed on our website since N/A and was downloaded 311 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded software with your antivirus. Your antivirus may detect the Janino as malware if the download link is broken.
How to install Janino on your Windows device:
- Click on the Download button on our website. This will start the download from the website of the developer.
- Once the Janino is downloaded click on it to start the setup process (assuming you are on a desktop computer).
- When the installation is finished you should be able to see and run the program.
