ABAP Development Tools for Eclipse
You you use the eclipse based ABAP Development Tools.
This site describes how to install and update the front-end components of ABAP Development Tools (ADT) and SAP BTP ABAP Environment.
It also provides you with detailed information on how to prepare the relevant ABAP back-end system for working with ADT. In case you connect to SAP BTP ABAP Environment, no further back-end preparation is necessary.
Follow the Tutorial to connect an existing system.