## Hierarchy For Package org.dom4j.util

Package Hierarchies:
  All Packages

## Class Hierarchy

- class java.lang.Object
  - class org.dom4j.tree.AbstractNode (implements java.lang.Cloneable, org.dom4j.Node, java.io.Serializable)
    - class org.dom4j.tree.AbstractAttribute (implements org.dom4j.Attribute)
      - class org.dom4j.tree.FlyweightAttribute
        - class org.dom4j.tree.DefaultAttribute
          - class org.dom4j.util.UserDataAttribute
    - class org.dom4j.tree.AbstractBranch (implements org.dom4j.Branch)
      - class org.dom4j.tree.AbstractElement (implements org.dom4j.Element)
        - class org.dom4j.tree.BaseElement
          - class org.dom4j.util.NonLazyElement
        - class org.dom4j.tree.DefaultElement
          - class org.dom4j.util.IndexedElement
          - class org.dom4j.util.UserDataElement
  - class org.dom4j.util.AttributeHelper
  - class org.dom4j.DocumentFactory (implements java.io.Serializable)
    - class org.dom4j.util.IndexedDocumentFactory
    - class org.dom4j.util.NonLazyDocumentFactory
    - class org.dom4j.util.UserDataDocumentFactory
  - class org.dom4j.util.NodeComparator (implements java.util.Comparator)
  - class org.dom4j.util.PerThreadSingleton (implements org.dom4j.util.SingletonStrategy)
  - class org.dom4j.util.ProxyDocumentFactory
  - class org.dom4j.util.SimpleSingleton (implements org.dom4j.util.SingletonStrategy)
  - class org.dom4j.util.XMLErrorHandler (implements org.xml.sax.ErrorHandler)

## Interface Hierarchy

- interface org.dom4j.util.SingletonStrategy

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