类分层结构
- java.lang.Object
- java.util.EventObject (implements java.io.Serializable)
- org.osgi.framework.FrameworkUtil
- java.security.Permission (implements java.security.Guard, java.io.Serializable)
- java.security.BasicPermission (implements java.io.Serializable)
- java.lang.Throwable (implements java.io.Serializable)
- org.osgi.framework.Version (implements java.lang.Comparable<T>)
- org.osgi.framework.VersionRange
接口分层结构