Eclipse Standard Quick Start on Ubuntu 15.04 Vivid 32/64-bit
How to Install and Getting Started with the Latest Eclipse IDE 2025-06 R Standard/Classic for Ubuntu 15.04 Vivid Vervet Unity i386/Amd64 desktop.
There is the Possibility also to Install the Eclipse Platform via apt-get But the Ubuntu 15.04 Vivid apt Repositories are still Back to a Legacy 3.x Eclipse Flavor.
So at the Moment if you want Install the Latest Release of Eclipse 2025-06 R Build on Ubuntu Linux 15.04 you will Need to Download and Install Eclipse 2025-06 R Release for Linux.
As Requisite an Oracle Java JDK 8+ Installation is Strongly Recommended to Run Eclipse and its Plugins for the Best Results.

The Eclipse Standard Release has beed Discontinuted, Install Instead, the Eclipse for Java Developers:
Eclipse IDE 2025-06 R for Java Installation on Ubuntu 15.04 Vivid