⚠️ UPDATE 12/2019: Moxiemocks is no longer actively maintained. You'll probably want to use Mockito instead - it's battle-tested, and at any rate their mocking syntax and feature set have improved since I first wrote Moxie.

Moxie is a library for creating mock objects in Java. It aims to enable prescriptive mock tests with an easy-to-use syntax:

• Concise - set up any expectation in one Java statement. Short method names, no anonymous inner classes, no need to "replay" mock objects.
• Refactorable - method name/signature changes using refactoring tools will be reflected in your tests.
• Easy - integrates with JUnit 4 to automatically create and verify mocks on your test objects. (You can still do this manually.)

Moxie is ovailable through Maven Central:

<dependency>
    <groupId>org.moxiemocks</groupId>
    <artifactId>moxie</artifactId>
    <version>1.1.0</version>
    <scope>test</scope>
</dependency>

Want to learn more? See...

• Javadoc for every public method
• Moxie by example - syntax comparison to other major mocking libraries, with a set of equivalent tests implemented in Moxie, JMock 1, JMock 2, EasyMock, Mockito
• Maven-generated site for the latest release (test coverage stats etc.)

You may also be interested in:

• An informal performance comparison of the major mocking libraries (executive summary: they all perform just fine)
• un-jmock1.rb - fugly, experimental Ruby script I wrote to do most of the donkey work of converting a client's JMock 1/JUnit 3 tests to Moxie/JUnit 4.