直接上代碼

class Dog {
    private static int age;
    private static String name;
    private static String nickName;
    private static String food;

    static class Builder {
        private Dog dog;

        Builder() {
            dog = new Dog();
        }

        Builder setAge(int age) {
            dog.age = age;
            return this;
        }

        Builder setName(String name) {
            dog.name = name;
            return this;
        }

        Builder setNickName(String nickName) {
            dog.nickName = nickName;
            return this;
        }

        Builder setEatFood(String foot) {
            dog.food = foot;
            return this;
        }

        void setLookHome() {
            System.out.print("name:" + name + "\n綽號：" + nickName + "\n年齡：" + age + "\n食物:" + food + "\n看家中----");
        }
    }
}

Dog.Builder builder = new Dog.Builder()
                .setAge(5)
                .setEatFood("肉")
                .setName("小黃")
                .setNickName("小黃黃");

        builder.setLookHome();

運(yùn)行

name:小黃
綽號：小黃黃
年齡：5
食物:肉
看家中----