Install Oracle Java SE Development Kit (JDK) version 1.8.* and set the JAVA_HOME environment variable.
Go to the product pageof WSO2 Enterprise Integrator, select Other Installation Options, and download the Binary distribution. Extract the ZIP file of the binary. This will be your <EI_HOME> directory.
Select and download the relevant WSO2 Integration Studio ZIP file based on your operating system from here and then extract the ZIP file. The path to this folder is referred to as <EI_TOOLING>throughout this tutorial.