静态工厂模式
ublic class FruitFactory {
public static Fruit getFruit(String name) {
Fruit f=null;
switch (name)
{
case "APPLE":{
f=new Apple();
}
case "BANANA":{
f=new Banana();
}
default :{System.out.println("Unknown Fruit");}
}
return f;
}
}
抽象工厂模式
建造者模式
public class MealBuilder {
public Meal suMeal() {
Meal m=new Meal();
m.additeam(new SuBuger());
m.additeam(new bing());
return m;
}
public Meal rouMeal() {
Meal m=new Meal();
m.additeam(new bing());
m.additeam(new RouBuger());
m.additeam(new RouBuger());
m.additeam(new RouBuger());
return m;
}
public Meal haohua(){
Meal m=new Meal();
m.additeam(new bing());
m.additeam(new RouBuger());
m.additeam(new RouBuger());
m.additeam(new SuBuger());
return m;
}
}
public class Meal {
private ArrayList<iteam> iteams=new ArrayList<iteam>();
public void additeam(iteam i) {
iteams.add(i);
}
public double getCost() {
return iteams.stream().mapToDouble(iteam::price).sum();
}
public void showItems() {
iteams.stream().forEach(
e->{
System.out.println(e.name());
e.packing().pack();
System.out.println(e.price());
}
);
}
}
public interface iteam {
String name();
Packing packing();
double price();
}
public class Main {
public static void main(String[] args) {
MealBuilder builder=new MealBuilder();
Meal haohua=builder.haohua();
double cost=haohua.getCost();
System.out.println("total"+cost);
haohua.showItems();
}
}
public abstract class ClodDrink implements iteam{
@Override
public Packing packing() {
return new Bottle();
}
}
public interface Packing {
void pack();
}
public class Wapper implements Packing{
@Override
public void pack() {
// TODO Auto-generated method stub
System.out.println("用纸包装");
}
}
public class bing extends ClodDrink{
@Override
public String name() {
// TODO Auto-generated method stub
return "北冰洋";
}
@Override
public double price() {
return 3.0;
}
}total15.5
北冰洋
用瓶子包装
3.0
肉的
用纸包装
5.0
肉的
用纸包装
5.0
素的
用纸包装
2.5