```
public int threeSumClosest(int[] nums, int target) {
Arrays.sort(nums);
int diff = Integer.MAX_VALUE;
int output = 0;
for(int i = 0; i < nums.length - 2; i++){
int low = i + 1;
int high = nums.length - 1;
while(low < high){
int sum = nums[i] + nums[low] + nums[high];
if(Math.abs(target - sum) < diff){
diff = Math.abs(target - sum);
output = sum;
}
if(sum > target) high--;
else low++;
}
}
return output;
}
```