How can I iterate over the elements in Hashmap?

Question

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?

Answer 1

Need Key & Value in Iteration

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());  } 

Need Key in Iteration

If you want just to iterate over keys of map you can use keySet()

for(String key: map.keySet()) {      Person value = map.get(key);  } 

Need Value in Iteration

If you just want to iterate over values of map you can use values()

for(Person person: map.values()) {  }