Question

In: Computer Science

Create a method that takes a HashMap<Integer, Integer> and returns the sum of the keys of...

Create a method that takes a HashMap<Integer, Integer> and returns the sum of the keys of the HashMap.

Expert Solution

CODE:

import java.util.*;

class Main {

public static int sumHashmap(HashMap<Integer,Integer> hm){

int sum=0;

for(Map.Entry<Integer,Integer>m : hm.entrySet()){

// get current key and int value of the current Integer object

sum+=m.getKey().intValue();

}

return sum;

}

public static void main(String[] args) {

HashMap<Integer,Integer> map=new HashMap<Integer,Integer>();//Creating HashMap

map.put(1,10);

map.put(2,20);

map.put(3,30);

map.put(4,40);

// calling the sun function with a HashMap

int result=sumHashmap(map);

System.out.println(result);

}

OUTPUT:

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venereology answered 8 months ago

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