Eclipse 3.7, Ant, Java 1.7

I went through and uninstalled all Java from my computer. Then I installed JavaSE JDK1.7. I then modified Eclipse configuration so it would start and opened it up. I have an Ant script to build my project and I want to build my pr开发者_开发技巧oject against 1.7, but whenever I run the script, it says

'Launching PROJECT build.xml' has encountered a problem.

Specified VM install not found: type Standard VM, name jdk1.6.0_21

The installed JRE in Eclipse is 1.7 and nothing else. I cannot for the life of me find how to change what Ant is looking for.

This is because you still have the old JDK configured as JRE in the External Tools Configuration" in eclipse - open it via the arrow menu next to this button in the toolbar:

In Eclipse, click the ant file -- Run As -- External Tools Configuration and click on the JRE tab.

Select "Run in the same JRE as the workspace"

Delete the "C:\Users\%USERNAME%\workspace.metadata.plugins\org.eclipse.debug.core.launches\%PROJECT_NAME% build.xml.launch file"

That solved problem for me.