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+//Title:        AntProgrammer%0A//Version:      %0A//Copyright:    Copyright (c) 1998%0A//Author:       Kim sang-kyun%0A//Company:      AntSoft. co.%0A//Description:  IDE %ED%94%84%EB%A1%9C%EC%A0%9D%ED%8A%B8%0A%0Apackage com;%0A%0Aimport java.util.*;%0A%0Apublic interface DataListener extends EventListener %7B%0A  public void dataChanged(DataEvent e);%0A  public void dataRemoved(DataEvent e);%0A%7D%0A

Create DataListener.java