[Java] import projects, the emergence The project can not be built until build path errors are resolved error Solution

Check jar package jar package if the address is not the same need to remove the re-imported, right-project → Build Path.

See additional jar package has no ×, the address is not correct, if not correct, remove the wrong jar package, and then click Add Extenal JARs

 

 Finally, check the JDK version, of course, choose their own computer to download version, click on the drop-down menu environment.

 

If there is wrong, I have no way out, go look at other tutorial.