java - Please help stuck on this UML diagram -

uml: -name: string -playerid: int -scores: int[] -bestscore: int -numberofplayers: int << constructors>> +player() +player(name: string) << set methods>> +setname(name: string):void +setscores(score: int[]):void << methods >> +getplayerid():int +getname():string +getscores():int[] +getbestscore(): int +calculateaverage(): double << helper methods >> -calculatebestscore(): void 

• the constructors increment static variable numberofplayers , assign value of numberofplayers playerid.
• the calculateaverage() public method determines average score player data stored in scores array.
• the getbestscore() method calls calculatebestscore() private helper method determines highest score achieved far player.

any ideas how should set numberofplayers assign value playerid ? , how calculateaverage , calculatebestscore methods ?

my code @ moment is:

    //class declaration of player class     public class player     {         /*--------------- data fields --------------------------------------         attributes of class         */         private string name;         private int playerid;         private int bestscore;         private int numberofplayers;         private int scores;         /* -------------- constructor --------------------------------------         */         public player(string name)         {             this.name = name;             this.numberofplayers = numberofplayers + 1;             this.playerid = this.numberofplayers;         }         //create set method setname         public void setname(string name)         {             this.name = name;         }         //create set method setscores         public void setscore(int score)         {             scores = score;         }         //create method getplayerid         public int getplayerid()         {             return playerid;         }          //create method getname         public string getname()         {             return name;         }         //create method getscores         public int getscores()         {             return scores;         }         //create method getbestscore         public int getbestscore()         {         return bestscore;         }         //create method calcualteaverage         public double calculateaverage()         {         }         } 

the constructors increment static variable numberofplayers , assign value of numberofplayers playerid

give variable static identifier, , initialize it:

private static int numberofplayers = 0; 

every time create new player class, increment 1:

public person() {     numberofplayers++; } 

you'll need method expose value of numberofplayers, , make static player class can call it:

public static int getnumplayers() {     return numberofplayers; } 

test it's valid approach such:

person = new person(); person b = new person(); person c = new person();  system.out.println(c.getnumplayers()); //will 3 based on above 

regarding calculation of scores, getscores , setscore methods problematic. first, getscores implies must return more 1 score. second, setscore has me wondering how many times must 1 player, , store values grow in collection of scores? feel ambitious me guess @ different approaches may satisfy need. if school assignment, check instructor. i'll share 1 approach uses arraylist data structure:

private arraylist<integer> scores = new arraylist<integer>();  public person() {  }  public void setscore(int score) {     scores.add(score); } 

to best score - how maximum value list/arraylist

to average score - calculating average of array list?