JMockit is a java framework for mocking objects in JUnit testing
Mockito is a mocking framework for Java
"Mockito s a much older library than jmockit so you could expect that it would have many more features"
from question "Major difference between: Mockito and JMockIt"
"Comparison between mockito vs jmockit - why is mockito voted better than jmockit"
from question "JUnit mocks, which tool should i use?"