Add occurrences of thrice in java

In this challenge you need to check for thrice occurrences in array and sum it up.


Input Format - 
you will be taking a number as an input from STDIN which tells about the length of the array. On another line, array elements should be there with single space between them. 

Output Format - 
You need to print the sum of the numbers occurring Thrice. 

	/*
	* Enter your code here. Read input from STDIN. Print your output to STDOUT.
	* Your class should be named CandidateCode.
	*/
	import java.io.*;
	import java.util.*;
	public class CandidateCode {
	public static void main(String args[] ) throws Exception {
	Scanner sc=new Scanner(System.in);
	int size;
	size=sc.nextInt();
	int [] arr=new int [size];
	for(int i=0;i<size;i++){
	arr[i]=sc.nextInt();
	}
	int sum=0,val=0;
	int count=0;
	for(int a=0;a<arr.length;a++){
	int x=arr[a];
	for(int b=a+1;b<arr.length;b++){
	int y=arr[b];
	if(x==y){
	count++;
	val=x; //val to store thrice occurrence value.
	}
	}
	if(count>1){
	sum+=val; //sum to add thrice occurrences value in array.
	}
	count=0; // resetting the counter.
	}
	System.out.println(sum);
	sc.close();
	sc.close();
	}
	}

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Sample Test Case: 
Sample Input:-12
9 8 7 7 8 6 5 4 7 8 1 2 
Sample Output - 
15

Explanation: 
elements 8 and 7 occurring Thrice and their sum is 15.