javax.swing.text

## Class DefaultStyledDocument.ElementBuffer

- java.lang.Object
- - javax.swing.text.DefaultStyledDocument.ElementBuffer

- All Implemented Interfaces:
    Serializable
  Enclosing class:
    DefaultStyledDocument

      public class DefaultStyledDocument.ElementBuffer
      extends Object
      implements Serializable

  Class to manage changes to the element hierarchy.

  Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the `java.beans` package. Please see `XMLEncoder`.

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `ElementBuffer(Element root)` | Creates a new ElementBuffer.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `change(int offset, int length, AbstractDocument.DefaultDocumentEvent de)` | Changes content.
    `protected void` | `changeUpdate()` | Updates the element structure in response to a change in the document.
    `Element` | `clone(Element parent, Element clonee)` | Creates a copy of this element, with a different parent.
    `Element` | `getRootElement()` | Gets the root element.
    `void` | `insert(int offset, int length, DefaultStyledDocument.ElementSpec[] data, AbstractDocument.DefaultDocumentEvent de)` | Inserts new content.
    `protected void` | `insertUpdate(DefaultStyledDocument.ElementSpec[] data)` | Inserts an update into the document.
    `void` | `remove(int offset, int length, AbstractDocument.DefaultDocumentEvent de)` | Removes content.
    `protected void` | `removeUpdate()` | Updates the element structure in response to a removal from the associated sequence in the document.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### ElementBuffer

          public ElementBuffer(Element root)

      Creates a new ElementBuffer.
      Parameters:
        `root` - the root element
      Since:
        1.4

  - ### Method Detail

    - #### getRootElement

          public Element getRootElement()

      Gets the root element.
      Returns:
        the root element

    - #### insert

          public void insert(int offset,
                             int length,
                             DefaultStyledDocument.ElementSpec[] data,
                             AbstractDocument.DefaultDocumentEvent de)

      Inserts new content.
      Parameters:
        `offset` - the starting offset >= 0
        `length` - the length >= 0
        `data` - the data to insert
        `de` - the event capturing this edit

    - #### remove

          public void remove(int offset,
                             int length,
                             AbstractDocument.DefaultDocumentEvent de)

      Removes content.
      Parameters:
        `offset` - the starting offset >= 0
        `length` - the length >= 0
        `de` - the event capturing this edit

    - #### change

          public void change(int offset,
                             int length,
                             AbstractDocument.DefaultDocumentEvent de)

      Changes content.
      Parameters:
        `offset` - the starting offset >= 0
        `length` - the length >= 0
        `de` - the event capturing this edit

    - #### insertUpdate

          protected void insertUpdate(DefaultStyledDocument.ElementSpec[] data)

      Inserts an update into the document.
      Parameters:
        `data` - the elements to insert

    - #### removeUpdate

          protected void removeUpdate()

      Updates the element structure in response to a removal from the associated sequence in the document. Any elements consumed by the span of the removal are removed.

    - #### changeUpdate

          protected void changeUpdate()

      Updates the element structure in response to a change in the document.

    - #### clone

          public Element clone(Element parent,
                               Element clonee)

      Creates a copy of this element, with a different parent.
      Parameters:
        `parent` - the parent element
        `clonee` - the element to be cloned
      Returns:
        the copy

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2026, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.