Qualitas.class Corpus is a compiled version of the Qualitas Corpus. It provides compiled Eclipse projects for the 111 Java systems included in the last release of the corpus.

Although the original Qualitas Corpus has provided a valuable contribution for experimentation in software engineering, there are several scenarios—e.g., experiments that rely on Abstract Syntax Tree (AST) or bytecode—in which researchers need to import and compile the source code. Since this task is not trivial in the case of systems with many external dependencies, our goal is to assist researchers by removing the compilation effort when conducting empirical studies .