JUnit is widely used for testing Java applications because of its user-friendly functionalities. It has some powerful advantages, such as the following:

• The JUnit framework is open source
• It provides text-based command lines as well as AWT-based and Swing-based graphical test mechanisms
• It has some annotations to utilize test functions
• It has a test runner to test running applications
• It allows you to write code
• It can test automatically and provide feedback