if my input is arr[]= {5,3,3,3,3,5,5,2} ,my output must be 5 2=7 I tried but i am geting output as 10,I dont understand what mistake I made,please help me out with this

    public static void main(String[] args) {
        int arr[]= {5,3,3,3,3,5,5,2};
        LinkedHashMap<Integer,Integer> map=new LinkedHashMap<Integer,Integer>();
        for(int i=0;i<arr.length;i  ) {
        if(map.containsKey(arr[i])){
            map.put(arr[i],map.get(arr[i]) 1);
        }
        map.put(arr[i], 1);
        }
       int sum=0;
       for(Map.Entry<Integer,Integer> e:map.entrySet()) {
       if(e.getValue()%2!=0) {
        sum=sum e.getKey();
    }
    }
    System.out.println(sum);
    }

}```

CodePudding user response：

Missing else

if(map.containsKey(arr[i])){
            map.put(arr[i],map.get(arr[i]) 1);
        }
else
        map.put(arr[i], 1);

That's why your elements are being initialized with frequency 1 each time instead of incrementing. So output is 5 3 2=10

CodePudding user response：

you are overiding the increment instead of :

 if(map.containsKey(arr[i])){
            map.put(arr[i],map.get(arr[i]) 1);
        }
        map.put(arr[i], 1);

do

 if(map.containsKey(arr[i])){
                map.put(arr[i],map.get(arr[i]) 1);
            }
            else map.put(arr[i], 1);