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Basic Statistics

Basic Statistics is a Java-based implementation for computing statistics on a set of numbers. This implementation is intended to be used in software engineering courses as a subject software system.

Basic Statistics uses the Apache Ant build system. Make sure that you have Ant installed.

How to build Basic Statistics and run its tests from the terminal:

  1. Change into the Basic Statistics root directory, which contains the build.xml build file.

  2. Run ant compile to compile Basic Statistics. The compiled class files will be in the bin directory.

  3. Run ant test to run all Basic Statistics unit tests.

  4. Run ant clean whenever you want to clean up the project (i.e., delete all generated files).

How to run Basic Statistics from the terminal:

  1. After building the project (i.e., running ant compile), run: java -cp bin BasicStats. The application's GUI will show up.

Program features:

  • Displays a set of entered numbers.
  • Computes the mean of the set of numbers.
  • Computes the median of the set of numbers.
  • Computes the mode of the set of numbers.

Troubleshooting

Outdated version of JUnit

If your system uses an outdated version of JUnit, you may encounter the following error:

[junit] junit/framework/JUnit4TestAdapterCache
[junit] java.lang.NoClassDefFoundError: junit/framework/JUnit4TestAdapterCache

Run ant -lib lib/ <target> to explicitly use JUnit4, which is provided in the lib directory. For example, run ant -lib lib/ test to run all Basic Statistics unit tests.

Java JDK not installed or misconfigured

If a Java JDK is not installed or properly configured on your system, you may encounter the following error:

BUILD FAILED
build.xml:17 Unable to find a javac compiler;

Make sure that you have a JDK installed and that the JAVA_HOME environment variable is properly set.