Suppose we have to automate a Java application. We cannot use pre-installed activities with the Java application as it will not recognize them properly. Hence, in order to use activities with the Java application, we have to install the Java plugin.

Follow these steps to install the Java plugin inside UiPath Studio:
1. Click on the SETUP wizard:

2. Next, click on Setup Extensions and choose Java:

A confirmation window will pop up stating that the Java plugin has been installed successfully.

To check whether the Java plugin is working properly, open UiExplorer, click on any Java application, and select an element. If the entire window is selected instead of that element, then your Java plugin has not been installed successfully. On the other hand, if the element is selected properly, then your Java plugin has been installed successfully.