Am confused about hashmap in Java

Question

Am trying to get output of this hasmap question:
I have players .put("Dave",64);
Players.put("Amy",103):
Players.put("Rob",74);
Now am ask to output Amy the highest score like this Amy with no score just Amy,
When I try changing the key to value it says error k,v cannot change to string
Please help this question have taken me not less than 8 hours searching the web for help.

Answer 1

Fineb Alex check this out it's perfectly working:

import java.util.HashMap;
import java.util.Map.Entry;

public class MyClass {
public static void main(String[ ] args) {
HashMap<Integer, String> players = new HashMap<Integer, String>();
players.put(74,"Rob");
players.put(154, "Amy");
players.put(103,"Dave");

//keys
for(Entry<Integer,String> entry: players.entrySet()){
System.out.println(entry.getKey());
}

//values
for(Entry<Integer,String> entry: players.entrySet()){
System.out.println(entry.getValue());
}
}
}

Answer 2

Fineb Alex you need to find max/highest score (key) from the hash map.
And print the value associated with that key like (154 is key of Amy)

import java.util.HashMap;
import java.util.Map.Entry;

public class MyClass {
public static void main(String[ ] args) {
HashMap<Integer, String> players = new HashMap<Integer, String>();
players.put(74,"Rob");
players.put(154, "Amy");
players.put(103,"Dave");

//Getting max key
int max = Collection.max(players.getKey());

for(Entry<Integer,String> entry: players.entrySet()){
if(max==entry.getKey()){
System.out.println(entry.getValue());
break;
}
}
}
}

Or

System.out.println(players.getValue(max));

Edit: your key and value pair is placed opposite,according to the Challenge String type in the hashmap is key and Integer type is value.

Answer 3

A colon after Players.put("Amy",103)
Better a semicolon

Answer 4

Try this:

for(Entry<String,Integer> entry: players.entrySet())
System.out.println(entry.getKey());

Answer 5

Fineb Alex import this

import java.util.Map.Entry;

Answer 6

Please share code

Answer 7

I Hv been battling with it since ystd

Answer 8

Yes I kn thanks

Answer 9

I can't share code is solo question

Answer 10

I even write my own code by changing the key to value it works but I can't do same in there code

Answer 11

import java.util.*;

public class Bowling {
HashMap<String, Integer> players;
Bowling() {
players = new HashMap<String, Integer>();
}
public void addPlayer(String name, int p) {
players.put(name, p);
}
//your code goes here
public void getWinner(){

players .put("Dave", 42);
players .put("Amy", 103);
players .put ("Rob", 64);

for (String i:players.keySet())

System.out.println(i);

}
}

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();
}
}

Answer 12

Frogged I HV share please help

Answer 13

I wrote my by changing the key it

https://code.sololearn.com/cWO0cv1Sk0Pk/?ref=app

Answer 14

Error cannot find symbol.

Answer 15

Same Result output with this code:

for (String I: players.keySet())
System.out.println(i);

Answer 16

The issue here is they want when you can this method game.getwinner();

only only highest score name must display check my code I past above to see how it suppose to be

Answer 17

What they want is wen u call 103 = Amy

Answer 18

hi

Answer 19

Hi Hector 01

Answer 20

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