JAva設計モード-Decorator
1345 ワード
//
abstract public class Component{
abstract public void prtTicket();
}
//
public class SaleTicket extend Component{
public void prtTicket(){
System.out.println("Sale Ticket" );
}
}
//
abstract public class TicketDecorator extend Component {
private Component myTrailer;
public TicketDecorator(Component comp){
myTrailer = comp;
}
public void callTrailer(){
if (myTrailer != null )
myTrailer.prtTicket();
}
}
}
// header
public class Header extend TicketDecorator{
public Header(Component comp){
super(comp);
}
public void prtTicket(){
System.out.println("Header" );
super.callTrailer();
}
}
// footer
public class Footer extend TicketDecorator{
public Footer (Component comp){
super(comp);
}
public void prtTicket(){
super.callTrailer();
System.out.println("Footer" );
}
}
//
public class Test{
public static void main(String args[]){
Component c = new Header( new Footer( new SaleTicket()));
c.prtTicket();
}
}