Eclipse - no Java (JRE) / (JDK) ... no virtual machine

eclipse path java
Wallter picture Wallter · Jan 8, 2010 · Viewed 936.4k times · Source

I am trying to get Eclipse v3.5 (Galileo) to re-run on my computer - I have run it before with no problems, but now I keep getting this error:

A Java Runtime Environment (JRE) or Java Development kit (JDK) must be available in order to run Eclipse. No Java virtual machine was found after searching the following locations: C:\eclipse\jre\javaw.exe javaw.exe in your current PATH

I've just done a fresh install of both the JDK and the SDK.

I have Windows 7 (x64).

What's up with this? How do I fix it?

I can't run any of the ipconfig / tracert / or ping.

Answer

VonC picture VonC · May 16, 2010

Eclipse will by default try to launch with the default "java.exe" (the first one referenced by your PATH)

Three things to remember:

  • "Installing" a JRE or a JDK can be as simple as unzipping or copying it from another computer: there is no special installation steps, and you can have as many different JVM versions (1.4, 5.0, 6.0...) as you want, "installed" (copied) almost anywhere on your disk.
  • I would recommend to always run Eclipse with the lastest JRE possible (to benefit from the latest hotspot evolutions). You can:
  • The JVM you will reference within your Eclipse session is not always the one used for launching Eclipse because:
    • You only need a JRE to launch Eclipse, but once Eclipse launched, you should register a JDK for your projects (especially for Java sources and debugging purposes, also in theory for compilation but Eclipse has its own Java compiler) Note: You could register just a JRE within Eclipse because it is enough to run your program, but again a JDK will allow for more operations.
    • Even though the default registered Java in Eclipse is the one used to launch the session, you can want to register an older SDK (including a non-Sun one) in order to run/debug your programs with a JRE similar to the one which will actually be used in production.

Installed JREs

June 2012, jmbertucci comments:

I'm running Windows 7 64-bit and I had the 32-bit JRE installed. I downloaded Eclipse 64-bit which looks for a 64-bit JRE. Because I didn't have the 64-bit JRE it threw the error, which makes sense.

I went to the Java manual install page (which was not as directly accessible as you'd like) and installed the 64-bit version. See "Java Downloads for All Operating Systems". That was all I needed.

April 2016: Steve Mayne adds in the comments:

I had to edit the eclipse.ini file to reference the correct Java path - Eclipse doesn't use the environment PATH at all when there is a value in eclipse.ini.

Related questions

How to add native library to "java.library.path" with Eclipse launch (instead of overriding it)

I got a native library that needs to be added to java.library.path. With JVM argument -Djava.library.path=path... I can set the path as I want. My problem is that my other library (pentaho reporting) searches fonts …

Read More
Setting up Eclipse with JRE Path

I have downloaded and extracted Eclipse. I have Eclipse in the following directory: C:\Applications\eclipse. When I try and run the executable , I get the following message : I currently have the following folder: C:\Program Files (x86)\Java\jre7 …

Read More
How to delete a long path in windows.

When importing a project into eclipse, it somehow started creating recursive versions of the directory. Now, when I try to delete anything, I get the message " the file name you specify is too long." I can't delete it from the …

Read More