Java - Data Structures -

i came across java data structures task. i'm looking confirmation understood correctly , approach right.

the task: product can have many different types of attributes, , can vary between products, e.g. bike can have following attributes: {price, color, size} , product kitchen table: {price, width, depth, height}. product attributes organized in hierarchical group structure, product attribute group can contain 1 or several product attributes and/or product attribute groups. write code needed in java handle above described products , print function prints data in such way clear attributes belong product , attribute group if any.

there image attached notation:
image
figure 1: note order important. in figure above attributes 1, attribute 3 , attributes 2 belong product attributes group.

so approach create abstract product class, , make 2 subclasses(bike, kitchentable) extending product class. correct? or entirely different?

please have @ composite pattern.

the composite pattern describes group of objects treated same way single instance of same type of object. matches task have product attributes have organized in hierarchical groups.