It is indirectly referenced from required. Class file error Solution

When importing a project today, the It is indirectly referenced from required. Class file error occurs. I checked the network and said yes.

 

Error message: it is indirectly referenced from required. Class file error Solution

Cause: the class you are about to use calls another class, and this class calls other classes. This relationship may have many layers. During this call, the missing package of a class will cause the above error.

Solution: import the missing package

 

I installed jdk1.5 and jdk1.6 on my machine, and then I modified the default JDK called by the project to jdk1.5. The problem is solved.