## Uses of Class
java.beans.Expression

- Packages that use Expression
  Package | Description
  --- | ---
  java.beans | Contains classes related to developing beans -- components based on the JavaBeans™ architecture.

- - ### Uses of Expression in java.beans

    Methods in java.beans that return Expression
    Modifier and Type | Method | Description
    --- | --- | ---
    `protected Expression` | DefaultPersistenceDelegate.`instantiate(Object oldInstance, Encoder out)` This default implementation of the `instantiate` method returns an expression containing the predefined method name "new" which denotes a call to a constructor with the arguments as specified in the `DefaultPersistenceDelegate`'s constructor.
    `protected abstract Expression` | PersistenceDelegate.`instantiate(Object oldInstance, Encoder out)` Returns an expression whose value is `oldInstance`.

    Methods in java.beans with parameters of type Expression
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | XMLEncoder.`writeExpression(Expression oldExp)` Records the Expression so that the Encoder will produce the actual output when the stream is flushed.
    `void` | Encoder.`writeExpression(Expression oldExp)` The implementation first checks to see if an expression with this value has already been written.

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.