Virtual Machinery's JHawk product generates a number of vital metrics relating to your Java code. Using these metrics you can improve the performance, reusability, maintainability and overall quality of Java code. The core classes provided can be used on any J2SE Java platform based on JDK 1.4.0 and above. GUI and command line versions of the product are available as well as an Eclipse plugin.

You can download a free evaluation copy of Virtual Machinery's JHawk product by following the Download Free Trial link above. There are two versions - one is a standard java Application and the other is an Eclipse plugin. The evaluation copy has all the features of the full JHawk product and is restricted in that it will only analyse one java file. You can select more files for analysis but only one will be analysed.

More information is available by clicking on the links above and if you have any specific queries we will be happy to answer them - just send your query to info@virtualmachinery.com. We hope that after your evaluation you will realise the value of our product and choose to purchase a full license and we offer a range of options which are outlined below.

The following versions of the product are available -

• JHawk Demo (Java Application and Eclipse plugin versions) - Full featured but restricted to the analysis of a single class at a time - does not include command line feature - Free download from Virtual Machinery website (see 'Download Free Trial' link above)
• JHawk Standard - Full featured. No limit on files. Single user license. Supplied as two jars - one for the GUI version and one for the command line version.
• JHawk Full (Single User) - Full featured. No limit on files. Single user license. With GUI and CommandLine jars. Supplied with full source code and programmers guide.
• JHawk Eclipse Plugin Standard (no source code) - Full featured. No limit on files. Single user license. Supplied as two eclipse plugins (for 3.0.0 and above and for 3.1.2 and above as well as the jar for the command line version.

A number of combination licenses which include the Eclipse plugins, the GUI application and the Command line jar are available -

• JHawk Standard Combination License (Single User) - Full featured. No limit on files. Standard Single user license. Supplied as two jars - one for the GUI version and one for the command line version plus the Eclipse plugin - versions are provided for Eclipse 3.0.0 and above and Eclipse 3.1.2 and above. Does not include source code.
• JHawk Full Combination License (Single User) - As for JHawk Standard (Single user). Full Single user license. Also supplied with full source code and programmers guide.
• JHawk Full Combination License (Site License) - As per full single user license. Site license. Supplied with full source code and programmers guide. Licensed for all users at a single physical location
• JHawk Full Combination License (Corporate License) - As per full single user license. Corporate license. Licensed for all users at any number of sites providing all sites belong to same corporate entity. Supplied with full source code and programmers guide.

Features
General

• Includes all standard Object-oriented code metrics and more (see below)
• Metrics can be viewed at System, Package, Class and Method level
• Customisable complexity analysis
• Command line version allows file selection/exclusion by regular expression; output to csv, html, xml files
• Guide to interpretation of object-oriented metrics (all versions including demo)
• Full Source code for all classes (only included with Full licenses)
• Full HTML Documentation (including Javadoc documentation) with details and examples of how to extend and modify the code for your own use(only included with Full licenses)
• Output analysis to HTML, XML and CSV
• Select all Java files in a directory tree with one click
• Based on parser created by industry standard javacc parser generator from Sun - now maintained and distributed by the java.net community.
• Full substitutability of classes in code allowing extensive user-modification (only included with Full licenses)

Industry Standard Metrics

• Cyclomatic Complexity- Total, Maximum and Average
• Halstead Metrics - Bugs Expected, Difficulty, Effort, Length,Vocabulary, Volume
• LCOM
• Coupling metrics - Fan In , Fan out, CBO
• Maintainability Index
• ReUse ratio
• Specialization ratio
• Numbers of classes, Methods and statements at System, Package, Class and method level as appropriate
• Response for class, Unweigthed Class size
• Message Passing Coupling
• SEI Maintainablity Index

Other Performance and Quality measurements

• Casts - number and type
• Class references - total number and number to each class
• Depth of nesting - total and maximum
• Loops - for and while
• Method calls - total number and number to each method
• Numbers of comments

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