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 lt Integer Player gt  name  new HashMap lt Integer Player gt          System out printf  Give the number of the players         int number of players   scanner nextInt          for int k 1 k lt  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 lt  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 lt  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 lt Map Entry lt Integer  Player gt  gt  set     name entrySet      for  Map Entry lt Integer  Player gt  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

User · Answer

HashMap lt Integer Player gt  hash   new HashMap lt Integer Player gt     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

User · Answer

You should not map score to player  You should map player  or his name  to score   Map lt Player  Integer gt  player2score   new HashMap lt Player  Integer gt      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

User · Answer

Need Key  amp  Value in Iteration  Use entrySet   to iterate through Map and need to access value and key   Map lt String  Person gt  hm   new HashMap lt String  Person gt      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 lt Map Entry lt String  Person gt  gt  set   hm entrySet     for  Map Entry lt String  Person gt  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

User · Answer

Since all the players are numbered I would just use an ArrayList lt Player gt     Something like  List lt Player gt  players   new ArrayList lt Player gt      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  lt  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

[java] How can I iterate over the elements in Hashmap?

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