Application domain: component measurement

Description:

JMT (Java Measurement Tool), was developed at the University of Magdeburg. The Java Measurement Tool realizes a static measurement of Java applications. It analyzes the Java classes and the relations between them. Please have a look at the list of used metrics.

Supported languages: Java

How to use the application:

There are two ways of analyzing Java classes. The first way is to analyze one single Java class (select ‘Analyze a File’). There is also the possibility to analyze an entire project consisting of several files (select ‘Analyze a Project’). To process an entire project you have to analyze it file by file. Click the button ‘Load File’ and select a Java file. It must be a source code file. It is impossible to process a compiled class file. After loading the file click the button ‘Analyze File’ to process it. You will get a message about the success or an occurring error. If you are analyzing a project, continue with the next file.
After processing the files, the results of the measurement are displayed. You can select to have a look at the data of the classes or the data of the methods contained within the project. Please notice the list of the metrics.

List of available metrics:

• Metrics on Class Level
  • DIT – Depth of Inheritance Tree
    Is the maximum length of the way from the class to the root. Classes without a parent class have a DIT of 0.
  • NOC – Number of Children
    Number of direct successor classes.
  • WMC – Weighted Methods per Class
    here: number of methods of the considered class.
  • WAC – Weighted Attributes per Class
    here: number of attributes of the considered class.
  • CBO – Coupling between Object Classes
    Number of classes, which are coupled with this class.
    Classes are coupled, if one class uses methods or attributes of the other class.
  • PIM – Number of Public Methods
  • NMI – Number of Methods inherited
    Number of methods of the direct parent class
  • NAI – Number of Attributes inherited
    Number of attributes of the direct parent class
  • NMO – Number of Methods overwritten
  • RFC – Response for a class
    Number of methods used by the class plus the methods of the class.
    Is the highest possible number of methods, which can be invoked by a message to this class.
  • LOC – Lines of Code
• Metrics on Method Level
• NOP – Number of Parameter
• LOC – Lines of Code
• Metrics on Inheritance Level
  • MIF – Method Inheritance Factor
    Relation of inherited methods to total number of methods.
• AIF – Attribute Inheritance Factor
  Relation of inherited attributess to total number of attributes.
• Metrics on System Level
• COF – Coupling Factor
  (= (total number of couplings) / (n2-n) ; with n = number
• ANM – Average Number of Methods per Class ANM – Average Number of Attributes per Class
• ANM – Average Number of Parameter per Method

Download (Freeware!):

english Version ca. 96KB ZIP archiv

Involved Persons / E-Mails:

Known Problems:

Classes with nested classes and interfaces can cause incorrect results.

Screenshot from the JavaMeasurement Tool (JMT)