Problems with JDK and Java compiler compliance level in build path in eclipse

What does roject facets do for you?

Http://baike.baidu.com/view/6257360.htm, in fact, I feel, is to allow us to create a project, we can independently define a template for us to use, in the definition of a variety of services used in the version, When you import items from other places, you need to modify the project to match the compilation Environment of Project Facets.

Cow Man Blog: (with detailed explanation of JDK compile and build path)

http://blog.csdn.net/shan9liang/article/details/17266519

Set up

Problem with JDK and Java compiler compliance level in build path in Eclipse (RPM)