Build path entry is missing: org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7
I solved this by configure the .classpath file. I use maven and I deleted a line with some invalid setting in the marked place shown below.
-----some files which is actually deleted in my project, I delete this line and all works fine------