# 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` | Encoder.`writeExpression​(Expression oldExp)` | The implementation first checks to see if an expression with this value has already been written.
`void` | XMLEncoder.`writeExpression​(Expression oldExp)` | Records the Expression so that the Encoder will produce the actual output when the stream is flushed.