The Type xxx cannot be resolved. It is indirectly referenced from required. class files error .....

EncounterThe Type xxx cannot be resolved.
It is indirectly referenced from required. class filesThe solution to the error is as follows:

I. 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

II:
The project was not built since its build path is incomplete. cannot find the class file for Java. Lang. Object. Fix the build path then try building this project

The Type java. Lang. object cannot be resolved. It is indirectly referenced from required. class files

The reason for the above warning is that you have installed multiple versions of JRE or JDK. In this case, eclipse will automatically take a picture of your JRE path, but there will be no idea for multiple versions.
You can only manually create...
1. Enter window \ preferences \ Java \ Installed jres
1) Press add
2) The ingress is added to the JRE name, for example, jdk1.5.0.03.
3) JRE Home Directory: select the path of the Security Group.
4) Press OK
2. Enter project \ properties \ Java bulid path
1) Add Library
2) Select the JRE system library and press next
3) Select workplace default JRE and press finish...

I processed it in this way and looked at it... solved it to end the post...