Given an array and a value, remove all instances of that value in-place and return the new length.

Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.

The order of elements can be changed. It doesn't matter what you leave beyond the new length.

Example:

Given nums = [3,2,2,3], val = 3,Your function should return length = 2, with the first two elements of nums being 2.

Solution:

class Solution {    public int removeElement(int[] nums, int val) {        if (nums==null || nums.length<1){            return nums.length;        }        int i, index=0;        for(i=0; i