Visibility

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## java.beans
Interface Visibility

    public interface Visibility

Under some circumstances a bean may be run on servers where a GUI is not available. This interface can be used to query a bean to determine whether it absolutely needs a gui, and to advise the bean whether a GUI is available.

This interface is for expert developers, and is not needed for normal simple beans. To avoid confusing end-users we avoid using getXXX setXXX design patterns for these methods.

Method Summary
`boolean` | `avoidingGui()` Determines whether this bean is avoiding using a GUI.
`void` | `dontUseGui()` This method instructs the bean that it should not use the Gui.
`boolean` | `needsGui()` Determines whether this bean needs a GUI.
`void` | `okToUseGui()` This method instructs the bean that it is OK to use the Gui.

Method Detail

### needsGui

    boolean needsGui()

  Determines whether this bean needs a GUI.

  Returns:
    True if the bean absolutely needs a GUI available in order to get its work done.

### dontUseGui

    void dontUseGui()

  This method instructs the bean that it should not use the Gui.

### okToUseGui

    void okToUseGui()

  This method instructs the bean that it is OK to use the Gui.

### avoidingGui

    boolean avoidingGui()

  Determines whether this bean is avoiding using a GUI.

  Returns:
    true if the bean is currently avoiding use of the Gui. e.g. due to a call on dontUseGui().

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