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JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档
Interface java.beans.Visibility - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档
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Interface java.beans.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.
-
avoidingGui()
-
-
dontUseGui()
- This method instructs the bean that it should not use the Gui.
-
needsGui()
-
-
okToUseGui()
- This method instructs the bean that it is OK to use the Gui.
needsGui
public abstract boolean needsGui()
- Returns:
- True if the bean absolutely needs a GUI available in
order to get its work done.
dontUseGui
public abstract void dontUseGui()
- This method instructs the bean that it should not use the Gui.
okToUseGui
public abstract void okToUseGui()
- This method instructs the bean that it is OK to use the Gui.
avoidingGui
public abstract boolean avoidingGui()
- Returns:
- true if the bean is currently avoiding use of the Gui.
e.g. due to a call on dontUseGui().
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