import java.util.Objects;
class Solution {
public int removeElement(int[] nums, int val) {
if (Objects.isNull(nums) || nums.length == 0) {
return 0;
}
int num = 0;
for (int i = 0; i < nums.length; ++ i) {
if (nums[i] != val) {
nums[num ++] = nums[i];
}
}
return num;
}
}import java.util.Objects;
class