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| Chapter 23 The java.beans Package |

## 23.23 java.beans.Visibility (JDK 1.1)

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This interface is intended to be implemented by advanced beans that may run either with or without a GUI (graphical user interface) present. The methods it defines allow a bean to specify whether it requires a GUI and allows the environment to notify the bean whether a GUI is available.

If a bean absolutely requires a GUI, it should return `true` from `needsGui()`. If a bean is running without a GUI, it should return `true` from `avoidingGui()`. If no GUI is available, the bean may be notified through a call to `dontUseGui()`, and if a GUI is available, the bean may be notified through a call to `okToUseGui()`.

    public abstract interface Visibility {
        // Public Instance Methods
                public abstract boolean avoidingGui();
                public abstract void dontUseGui();
                public abstract boolean needsGui();
                public abstract void okToUseGui();
    }

java.beans.VetoableChangeSupport (JDK 1.1) |  | The java.io Package