Janino 2.7.8


Free
1.05 MB
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Publisher Description



Janino is a free software application from the Other subcategory, part of the Development category. The app is currently available in English. The program can be installed on Win95, Win98, WinME, WinNT 3.x, WinNT 4.x, Windows2000, WinXP, Win7 x32, WinVista, Unix, Linux, Mac PPC.

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.

Janino (version 2.7.8) has a file size of 1.05 MB and is available for download from our website. Just click the green Download button above to start. Until now the program was downloaded 100 times. We already checked that the download link to be safe, however for your own protection we recommend that you scan the downloaded software with your antivirus.

Program Details



General

 
Publisher Arno Unkrig
Released Date N/A
Languages English

Category

 
Category Development
Subcategory Other

System requirements

 
Operating systems linux, mac, other, unix, windows

Download information

 
File size 1.05 MB
Total downloads 100

Pricing

 
License model Free
Price N/A

Version History



Here you can find the changelog of Janino since it was posted on our website on 2015-04-26. The latest version is 2.7.8 and it was updated on soft112.com on 2017-07-02. See below the changes in each version:

version 2.7.8

posted on 1970-01-01

Updated the overview page.

version 2.5.7

posted on 2002-11-09

Updated the overview page.






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Users Rating:  
  2.7/5     6
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Downloads last week: 0
Release Date: N/A
Publisher: Arno Unkrig
Operating System: linux, mac, other, unix, windows