There were several popular Java automation testing tools available for different purposes. Please note that the landscape of testing tools can change rapidly, so it’s always a good idea to verify the latest information. Here are some commonly used Java automation testing tools:

1. JUnit: JUnit is one of the most widely used testing frameworks for unit testing Java applications. It provides annotations and assertions to create and execute test cases.

2. TestNG: TestNG is another testing framework inspired by JUnit, but it offers more features like test dependencies, test groups, and parallel test execution.

3. Selenium WebDriver: Selenium WebDriver is a powerful tool for browser automation testing. It allows you to interact with web elements, simulate user actions, and validate web applications across different browsers.

4. Cucumber: Cucumber is a popular tool for behavior-driven development (BDD) testing. It uses the Gherkin language to write test scenarios in a human-readable format.

5. Appium: Appium is a mobile application automation testing tool that supports both Android and iOS platforms. It allows you to write tests using standard WebDriver syntax.

6. RestAssured: RestAssured is a Java library for API testing. It provides an expressive DSL for making HTTP requests and validating API responses.

7. Jenkins: Jenkins is not a testing framework itself, but it is a popular automation server that can be used for continuous integration and continuous delivery (CI/CD) pipelines. It can integrate with various testing tools and execute tests automatically.

8. TestContainers: TestContainers is a Java library that allows you to use Docker containers for running your integration tests. It provides a convenient way to set up and tear down test environments in containers.

9. Mockito: Mockito is a mocking framework for Java that helps in creating mock objects for unit testing. It allows you to simulate the behavior of dependencies and isolate the code under test.

10. JMeter: While not exclusively a Java tool, Apache JMeter is a widely used performance testing tool written in Java. It is primarily used for load testing and performance measurement of web applications.

These are just a few examples, and there are many other testing tools available in the Java ecosystem catering to specific testing needs. Always consider your project requirements and choose the tools that best fit your testing objectives. Additionally, make sure to check for updates and newer tools in the Java testing landscape.