Eclipse project red cross: error Description Resource Path Location Type Target runtime Apache Tomcat v8.0 is not defined.

In the study room to write the project, tomcat version is 8.0, then u disk copying on their computer, import the project, there have been:

 

 

 But the project was not wrong, look after the error message found:

 

 

 

 Tomcat version is wrong, and thus be: .settings open the file in the project folder, under a org.eclipse.wst.common.project.facet.core the xml file.

Open found:

 

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