[Eclipse]The type XXX cannot be resolved. It is indirectly referenced from required .class files

在Eclipse中遇到The type XXX cannot be resolved. It is indirectly referenced from required .class files错误.....,查找的解决办法如下:
一:
It is indirectly referenced from required .class file

原因：你正要使用的类调用了另一个类，而这个类又调用了其他类，这种关系可能会有好多层。而在这个调用的过程中，某个类所在的包的缺失就会造成以上那个错误。

解决方法：导入缺失的包

二:
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

出现以上讯息的原因是因為你装了多个版本的jre或jdk的关係。本来Eclipse在建立专案时，会自动参照你的jre路径，但多个版本就没办法了。
你只能手动建立…
1. 进入window\preferences\java\Installed JREs
1)按Add
2)输入JRE Name, 例JDK1.5.0.03
3)JRE home directory, 选择安装的路径
4)按OK
2. 进入Project\properties\Java Bulid Path
1)Add library
2)选JRE System Library后按Next
3)选workplace default JRE后按finish...