Requirements of class design

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Java

You need to create classes for the player and team with appropriate members.

Include two functions in class Team:
A function to add new player to the team
A function to calculate and return the total score of the team by adding the individual score of its players.

A team has team name, country of the team, maximum of 5 team players. A player has the data of player name and player individual score. The search function reads the team name and displays all the information of the team including the team players and their scores. The leader board function shows all the teams (name and total score) from the highest to the lowest score.

Now I have create class of team and player. but my add player have error of invalid method declaration; return type required and cannot find symbol method add(player)

anyone have help me to fixed it

What I have tried:

public class Player {
    private String name;
    private double score;
    private Player player;
    
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name=name;
    }
    public double getScore(){
        return score;
    }
    public void setscore(double score){
       this.score=score;
    }
    public Player(String name, double score){
        this.name=name;
        this.score=score;
    }
    public addPlayer(String name, double score){
        player.add(player);
    }
    @Override
    public String toString(){
    return "\nName: "+name+"\nScore:"+score;
    }
}

public class Team {
    private String teamname;
    private String countryname;
    private Player player;
    private int teamscore;

    public String getteamName(){
    return teamname;
    }
    public void setteamName(String teamname){
    this.teamname = teamname;
    }
    public String getCountryname(){
    return countryname;
    }
    public void setCountry(String countryname){
    this.countryname = countryname;
    }
    public Player getPlayer(){
    return player;
    }
    public void setPlayer(Player player){
    this.player=player;
    }
    public void addPlayer(Player player){
    player.add(player);
    }
    public void teamScore(int score){
    teamscore+=score;
    }

    @Override
    public String toString() {
    return "Team{" + "teamname=" + teamname + ", countryname=" + countryname + ", player=" + player + ", teamscore=" + teamscore + '}';
    }
}