The type XXX cannot be resolved. It is indirectly referenced from required. class files error

When The type XXX cannot be resolved. It is indirectly referenced from required. class files error... is encountered, The solution 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

Outbound? Above? Why? How many times does zookeeper B exist ?? What is the version of jre or jdk ?? S. Ben ?? Is clipse being created? 0? R ,???? Why? Re road? Sword ???? Version?]? Method.
You can only hand it? Yong ?? Hellip;
1 .? Enter windowpreferencesjavaInstalled JREs
1) press Add
2 )? Enter JRE Name, for example, JDK1.5.0.03.
3) JRE home directory ,?? What is the path of Branch B?
4) Press OK
2 .? Enter ProjectpropertiesJava Bulid Path
1) Add library
2 )? After JRE System Library, press Next
3 )? Click finish after the workplace default JRE...