CommandListener.java

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package javax.microedition.lcdui;
/**
 * This interface is used by applications which need to receive high-level events from the implementation. An application will provide an implementation of a CommandListener (typically by using a nested class or an inner class) and will then provide the instance to the addCommand method on a Displayable in order to receive high-level events on that screen.
 * The specification does not require the platform to create several threads for the event delivery. Thus, if a CommandListener method does not return or the return is not delayed, the system may be blocked. So, there is the following note to application developers:
 * Since: MIDP 1.0 See Also:Displayable.setCommandListener(javax.microedition.lcdui.CommandListener)
 */
public interface CommandListener{
    /**
     * Indicates that a command event has occurred on Displayable d.
     */
    public abstract void commandAction(Command c, Displayable d);

}