如何使用枚举或其他方式在java中构建类别的层次结构树? [英] How to build an hierarchy tree of categories in java using enums or any other way?
问题描述
由于每个集合的基数是预先已知的,我的初始方法是使用枚举类型,而不是使用继承来构建类,但是我可以接受任何建议。
提前感谢
可能是这样的一个实现:
public interface Category {
String getName();
类别getParent();
列表<类别> getSiblings();
列表<类别>的getChildren();
列表<类别> getDescendants();
void addChild(Category category);
void addChildren(List< Category> categories);
}
Assuming that we have a set of categories: categories={A,B}. Let's assume more that A consists of subcategories: {A1,A2,A3} and B consists of subcategories: {B1,B2}.In addition, there are even more subcategories as follows: for A1:{A1a,A1b}, for A2:{A2a,A2b}, for A3:{A3a,A3b,A3c}, for B1:{B1a,B1b,B1c}, for B2:{B2a,B2b}. How can I build an hierarchical structure in java?
Since the cardinality of each set is fixed and known in advance, my initial approach is to use enum types instead of building classes with inheritance, but I am open to any suggestion. I do not know how to approach this problem.
Thanks in advance.
Probably an implementation of this:
public interface Category {
String getName();
Category getParent();
List<Category> getSiblings();
List<Category> getChildren();
List<Category> getDescendants();
void addChild(Category category);
void addChildren(List<Category> categories);
}
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