I want to make a Java game. At first the program asks for the number of the players; after that, it asks for their names. I put their names in a HashMap with an ID and their score. At the end of the game I count the score and I want to put it in the HashMap (the specific score for the specific name). Does anyone know how to do this? This is my code:
Player:
public class Player {
public Player() {
}
public void setScore(int score) {
this.score = score;
}
public void setName(String name) {
this.name = name;
}
private String name;
private int score;
public Player(String name, int score) {
this.name = name;
this.score = score;
}
public String getName() {
return name;
}
@Override
public String toString() {
return "Player{" + "name=" + name + "score=" + score + '}';
}
public int getScore() {
return score;
}
main:
Scanner scanner = new Scanner(System.in);
HashMap<Integer,Player> name= new HashMap<Integer,Player>();
System.out.printf("Give the number of the players ");
int number_of_players = scanner.nextInt();
for(int k=1;k<=number_of_players;k++)
{
System.out.printf("Give the name of player %d: ",k);
name_of_players= scanner.nextLine();
name.put(k, new Player(name_of_players,0));//k=id and 0=score
}
//This for finally returns the score and
for(int k=1;k<=number_of_players;k++)
{
Player name1 = name.get(k);
System.out.print("Name of player in this round:"+name1.getName());
..............
.............
int score=p.getScore();
name.put(k,new Player(name1.getName(),scr));//I think here is the problem
for(int n=1;n<=number_of_players;n++)//prints all the players with their score
{
System.out.print("The player"+name1.getName()+" has "+name1.getScore()+"points");
}
Does anyone know how can I finally print for example:
"The player Nick has 10 points.
The player Mary has 0 points."
Update:
I did this in main(as Jigar Joshi suggest)
name.put(k,new Player(name1.getName(),scr));
Set<Map.Entry<Integer, Player>> set = name.entrySet();
for (Map.Entry<Integer, Player> me : set)
{
System.out.println("Score :"+me.getValue().getScore() +" Name:"+me.getValue().getName());
}
and it prints "Score :0 Name : a Score :4 Name : a" when i put two names of players "a" and "b".I think the problem is here
name.put(k,new Player(name1.getName(),scr));
How can I put the names in "names_of_players" of my previous for?
This question is related to
java
Use entrySet() to iterate through Map and need to access value and key:
Map<String, Person> hm = new HashMap<String, Person>();
hm.put("A", new Person("p1"));
hm.put("B", new Person("p2"));
hm.put("C", new Person("p3"));
hm.put("D", new Person("p4"));
hm.put("E", new Person("p5"));
Set<Map.Entry<String, Person>> set = hm.entrySet();
for (Map.Entry<String, Person> me : set) {
System.out.println("Key :"+me.getKey() +" Name : "+ me.getValue().getName()+"Age :"+me.getValue().getAge());
}
If you want just to iterate over keys of map you can use keySet()
for(String key: map.keySet()) {
Person value = map.get(key);
}
If you just want to iterate over values of map you can use values()
for(Person person: map.values()) {
}
Since all the players are numbered I would just use an ArrayList<Player>()
Something like
List<Player> players = new ArrayList<Player>();
System.out.printf("Give the number of the players ");
int number_of_players = scanner.nextInt();
scanner.nextLine(); // discard the rest of the line.
for(int k = 0;k < number_of_players; k++){
System.out.printf("Give the name of player %d: ", k + 1);
String name_of_player = scanner.nextLine();
players.add(new Player(name_of_player,0)); //k=id and 0=score
}
for(Player player: players) {
System.out.println("Name of player in this round:" + player.getName());
HashMap<Integer,Player> hash = new HashMap<Integer,Player>();
Set keys = hash.keySet();
Iterator itr = keys.iterator();
while(itr.hasNext()){
Integer key = itr.next();
Player objPlayer = (Player) hash.get(key);
System.out.println("The player "+objPlayer.getName()+" has "+objPlayer.getScore()+" points");
}
You can use this code to print all scores in your format.
You should not map score to player. You should map player (or his name) to score:
Map<Player, Integer> player2score = new HashMap<Player, Integer>();
Then add players to map: int score = .... Player player = new Player(); player.setName("John"); // etc. player2score.put(player, score);
In this case the task is trivial:
int score = player2score.get(player);
Source: Stackoverflow.com