Eclipse: The specified JRE installation does not exist

In eclipse click Window –> Show view –> Servers

Once you are in servers view double click configured server to open its configuration and click Runtime environment link (in the left side).

Select the JRE and click finish.

Hope it help you

I had the same problem. This is how I fixed it.

1. Open Eclipse.
2. Go to Preferences.
3. Click Add
4. A Window should popup with this:

5. Select Standard VM.
6. Select Directory
7. Use this path: Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/
8. Click Open
9. Then Finish
10. Right click your Project then click Properties
11. Select Java Build Path then click Add Library
12. Select JRE System Library

13. Click Environments and select the jdk1.7.0_45
14. Finish

This is what you should see if you did it right:

Your run configurations maybe trying to use a specific JRE.

Make sure you are using the correct JRE there.