数组中倒数第二小的数

    public static void main(String[] args) {
        int arr[]={-4,-3,56,34,76,34,23,4,75,87,50,3,5,6,};
        int min = arr[0];
        int sec = arr[1];
        int temp;
        if (min>sec){
            temp = min ;
            min = sec;
            sec = temp;
        }
        for (int i = 3; i < arr.length; i++) {
            if (arr[i]<min){
                sec = min;
                min = arr[i];
            }else if (arr[i]>min&&arr[i]<sec){
                sec = arr[i];
            }
        }
        System.out.println(sec);
    }