# Hierarchy For Package org.apache.poi.openxml4j.opc.internal

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - org.apache.poi.openxml4j.opc.internal.ContentType
  - org.apache.poi.openxml4j.opc.internal.ContentTypeManager
    - org.apache.poi.openxml4j.opc.internal.ZipContentTypeManager
  - org.apache.poi.openxml4j.opc.internal.FileHelper
  - java.io.OutputStream (implements java.io.Closeable, java.io.Flushable)
    - org.apache.poi.openxml4j.opc.internal.MemoryPackagePartOutputStream
  - org.apache.poi.openxml4j.opc.PackagePart (implements java.lang.Comparable<T>, org.apache.poi.openxml4j.opc.RelationshipSource)
    - org.apache.poi.openxml4j.opc.internal.MemoryPackagePart
    - org.apache.poi.openxml4j.opc.internal.PackagePropertiesPart (implements org.apache.poi.openxml4j.opc.PackageProperties)
  - org.apache.poi.openxml4j.opc.internal.ZipHelper

## Interface Hierarchy

- org.apache.poi.openxml4j.opc.internal.PartMarshaller
- org.apache.poi.openxml4j.opc.internal.PartUnmarshaller

Copyright 2020 The Apache Software Foundation or its licensors, as applicable.