Java建造者模式

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Meal:

public class Meal {    private String food;    private String drink;    public void setFood(String food){        this.food = food;    }    public String getFood(){        return food;    }    public void setDrink(String drink){        this.drink = drink;    }    public String getDrink(){        return drink;    }}

MealBuilder:

public abstract class MealBuilder {    private Meal meal = new Meal();    public abstract void buildFood();    public abstract void buildDrink();    public Meal getMeal(){        return meal;    }}

SubMealBuilderA:

public class SubMealBuilderA extends MealBuilder {    @Override    public void buildFood() {        System.out.println("This is SubMealBuilderA food!");    }    @Override    public void buildDrink() {        System.out.println("This is SubMealBuilderA Drink!");    }}

SubMealBuilderB:

public class SubMealBuilderB extends MealBuilder{    @Override    public void buildFood() {        System.out.println("This is SubMealBuilderB food!");    }    @Override    public void buildDrink() {        System.out.println("This is SubMealBuilderB drink!");    }}

KFCWaiter:

public class KFCWaiter {    private MealBuilder mb = null;    public KFCWaiter(){    }    public KFCWaiter(MealBuilder mb){        this.mb = mb;    }    public void setMealBuilder(MealBuilder mb){        this.mb = mb;    }    public Meal construct(){        mb.buildDrink();        mb.buildFood();        return mb.getMeal();    }}

BuilderMethod(調用):

public class BuilderMethod{    public static void main(String[] args){        MealBuilder mb_1 = new SubMealBuilderA();        MealBuilder mb_2 = new SubMealBuilderB();        KFCWaiter kfc = null;        kfc = new KFCWaiter(mb_1);        kfc.construct();        kfc = new KFCWaiter(mb_2);        kfc.construct();    }}

Result:

This is SubMealBuilderA Drink!
This is SubMealBuilderA food!
This is SubMealBuilderB drink!
This is SubMealBuilderB food!

Java建造者模式