装饰模式，制作一个蛋糕java

import java.text.DecimalFormat; //抽象组件组件
interface mkcake
{
public void cake();
}
class Cake implements mkcake
{ @Override
public void cake() {
// TODO Auto-generated method stub
System.out.println("一个成型蛋糕"); }}
//装饰接口
abstract class Decorator implements mkcake
{
mkcake m; public Decorator(mkcake m)
{
this.m=m;
} }
class AddMilk extends Decorator
{
public AddMilk(mkcake m)
{
super(m);
} @Override
public void cake() {
// TODO Auto-generated method stub
m.cake();
System.out.println("加了牛奶"); }}
class AddEgg extends Decorator
{
public AddEgg(mkcake m)
{
super(m);
} @Override
public void cake() {
// TODO Auto-generated method stub
m.cake();
System.out.println("加了鸡蛋"); }}public class 装饰模式 { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
//开始制作蛋糕
mkcake c=new Cake();
mkcake m=new AddMilk(new AddEgg(new Cake()));
m.cake(); }}