java language

Write a data structure BankQueue which prioritise data in a queue into three groups: Gold member, Silver member, and Bronze member. When the data structure is requested to return an element it will check first the Gold members, next the Silver members and finally the Bronze members. Coderunner will tests the data structure for the following member functions: addGold(E data); addSilver(E data); addBronze(E data); E next()