ResourceBundleControlProvider (Java Platform SE 8 )
Keywords: java.util.spi.ResourceBundleControlProvider interface
Date: 2026-04-17

compact1, compact2, compact3
java.util.spi

## Interface ResourceBundleControlProvider

-     public interface ResourceBundleControlProvider

  An interface for service providers that provide implementations of `ResourceBundle.Control`. The default resource bundle loading behavior of the `ResourceBundle.getBundle` factory methods that take no `ResourceBundle.Control` instance can be modified with `ResourceBundleControlProvider` implementations.

  Provider implementations must be packaged using the Java Extension Mechanism as installed extensions. Refer to `ServiceLoader` for the extension packaging. Any installed `ResourceBundleControlProvider` implementations are loaded using `ServiceLoader` at the `ResourceBundle` class loading time.

  Since:
    1.8
  See Also:
    `ResourceBundle.getBundle`, `ServiceLoader.loadInstalled(Class)`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `ResourceBundle.Control` | `getControl(String baseName)` Returns a `ResourceBundle.Control` instance that is used to handle resource bundle loading for the given `baseName`.

- - ### Method Detail

    - #### getControl

          ResourceBundle.Control getControl(String baseName)

      Returns a `ResourceBundle.Control` instance that is used to handle resource bundle loading for the given `baseName`. This method must return `null` if the given `baseName` isn't handled by this provider.
      Parameters:
        `baseName` - the base name of the resource bundle
      Returns:
        a `ResourceBundle.Control` instance, or `null` if the given `baseName` is not applicable to this provider.
      Throws:
        `NullPointerException` - if `baseName` is `null`

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