27. Remove Element【移除元素】

package LeetCode;

public class Test {
    public static void main(String[] args) {
        int[] nums1 = {3,2,2,3};
        
        for (int i = 0; i < nums1.length; i++) {
            System.out.print(nums1[i] + "\t");
        }
        System.out.println();
        System.out.println(removeElement(nums1, 3));
        
        int[] nums2 = {0,1,2,2,3,0,4,2};
        
        for (int i = 0; i < nums2.length; i++) {
            System.out.print(nums2[i] + "\t");
        }
        System.out.println();
        System.out.println(removeElement(nums2, 2));
    }
    
    public static int removeElement(int[] nums, int val) {
        int length = nums.length;
        
        int i = 0, j = 0;
        while (i < length) {
            if (nums[i] != val) {
                nums[j] = nums[i];
                j++;
                i++;
            } else {
                //去重
                i++;
            }
        }
        
        if (j == 0) {
            return 0;
        } else {
            for (int k = 0; k < j; k++) {
                System.out.print(nums[k] + "\t");
            }
            
            System.out.println();
            
            return j;
        }
    }
}