The Java file in the Eclipse project has been imported into a hollow J issue

1. Select the project name right---the property-->java Build path will see a blank in the right source tag

2, click Add Folder ... Select the SRC package and the associated profile package, click OK:

3, then click Browse ... in the lower right corner, select the appropriate classes, and click OK:

4, then the corresponding libraries Plus, such as the JRE, etc.:

5, compile a bit OK.

The Java file in the Eclipse project has been imported into a hollow J issue