Eclipse” is a widely used integrated development environment (IDE) for writing, debugging, and running software. It is mainly used for Java development but supports many other languages with the help of plugins. “JDK” stands for “Java Development Kit,” which is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter/loader (java), a compiler (javac), an archiver (jar), a documentation generator (javadoc) and other tools needed in Java development.

In order to use Eclipse for Java development, you need to have JDK installed on your computer because Eclipse itself doesn’t come with a Java compiler; instead, it uses the compiler provided in the JDK.

Here are the general steps you can follow to set up Eclipse with JDK:

1. Download and install JDK from the Oracle’s website. Be sure to choose the version that matches your operating system and system architecture (32-bit or 64-bit).

2. Set JAVA_HOME: This environment variable should point to the JDK installation directory. This step is important because some tools might rely on it to find the JDK. The process of setting this variable depends on your operating system.

3. Download and install Eclipse: You can download Eclipse from the official Eclipse website. The installation is typically straightforward.

4. Configure Eclipse to use the JDK: When you start Eclipse for the first time, it asks you to choose a workspace. After that, you can go to Window -> Preferences -> Java -> Installed JREs, and then add your installed JDK location. The JDK is typically installed in a directory under Program Files on Windows and /usr/lib/jvm on Linux.

5. Once you’ve done this, Eclipse should be able to compile and run Java programs using the JDK.

Remember that both JDK and Eclipse come in different versions, so the process might vary slightly depending on the versions you’re using