If you use IntroClassJava, please cite the following technical report:

Thomas Durieux and Martin Monperrus. "IntroClassJava: A Benchmark of 297 Small and Buggy Java Programs". Technical Report hal-01272126, University of Lille; 2015.

@techreport{durieux:hal-01272126,
  TITLE = {{IntroClassJava: A Benchmark of  297 Small and Buggy Java Programs}},
  AUTHOR = {Durieux, Thomas and Monperrus, Martin},
  URL = {https://hal.archives-ouvertes.fr/hal-01272126/document},
  INSTITUTION = {{Universite Lille 1}},
  YEAR = {2016},
  NUMBER = {hal-01272126},
}

This benchmark has been automatically generated from the IntroClass benchmark for C from the Autorepair Benchmark Suite, a joint project between Carnegie-Mellon University and the University of Massachusetts (http://repairbenchmarks.cs.umass.edu/).

introclassJava/
 |-lib/
 |--data/
 |---dataset.xml
 |--CToJava.py
 |--evalIntroClassJava.py
 |-dataset/
 |--checksum/
 |---f4a823174201234546789abcdeffff<repository ID hex string>.../
 |----000/
 |-----src/
 |------main/
 |-------java/introclassJava
 |--------digits_f4a823174201234546789abcdeffff_000.java
 |------test/
 |-------java/introclassJava
 |--------digits_f4a823174201234546789abcdeffff_000BackboxTest.java
 |----001/
 |--------<same as above>
 |---09F911029D74E35BD84156C5635688C0<next repository ID hex string>.../
 |--digits/
 |-...

The folder lib contains the python scripts use to transform the C dataset to a Java dataset.

The file lib/data/dataset.xml contains the dataset IntroClass transformed into xml via the following command:

srcml --language=C --literal --operator --modifier `find  IntroClass -name "*.c"` -o IntroClassJava/lib/data/dataset.xml

The folder dataset contains the assignment programs:

• checksum -- compute a simple checksum of a string
• digits -- reverse the digits of an integer "123" -> "321"
• grade -- compute the letter grade corresponding to a percentage
• median -- give the median of three numbers
• smallest -- give the smallest of three numbers
• syllables -- give the number of English syllables in a string

Each subdirectory below represents a student's submitted repository which contains several revisions. Each revision is a maven project.