2021-10-19-学习笔记

You are creating a bowling game!
The given code declares a Bowling class with its constructor and addPlayer() method.
Each player of the game has a name and points, and are stored in the players HashMap.
The code in main takes 3 players data as input and adds them to the game.
You need to add a getWinner() method to the class, which calculates and outputs the name of the player with the maximum points.

Sample Input:
Dave 42
Amy 103
Rob 64

Sample Output:
Amy

import java.util.*; 

public class Bowling {
    HashMap players;
    Bowling() {
        players = new HashMap();
    }
    public void addPlayer(String name, int p) {
        players.put(name, p);
    }
    //code goes here
    public void getWinner() {
		String name, winner;
		int flag, points, max;
		flag = 0;
		max = 0;
		winner = "";
	   for (String i : players.keySet()) {
	   	name = i;
	   	points = players.get(i);
	   	if (flag == 0) {
	   		winner = name;
	   		max = points;
	   		flag = 1;
	   	}
	   	else {
	   		if (max < points){
	   			max = points;
	   			winner = name;
	   		}
	   	}
	   	}
	   System.out.println(winner);
	   }

    
}

public class Program {
    public static void main(String[ ] args) {
        Bowling game = new Bowling();
        Scanner sc = new Scanner(System.in);

        for(int i=0;i<3;i++) {
            String input = sc.nextLine();
            String[] values = input.split(" ");
            String name = values[0];
            int points = Integer.parseInt(values[1]);
            game.addPlayer(name, points);
        }
        game.getWinner();
    }
}