libcofoja-java 1.0~r139-2 (amd64 binary) in ubuntu utopic

 Contracts for Java is a contract programming framework for Java, which
 uses annotation processing and bytecode instrumentation to provide
 run-time checking.
 .
 Contracts for Java enables you to annotate your code with contracts
 in the form of preconditions, postconditions and invariants.
 .
 These contract annotations are:
  - easy to write and read
  - checked at runtime