src/solution/Solution.java

@@ -175,18 +175,8 @@ public class Solution {
      */
     public static int removeDuplicates(int[] nums) {
         int i = 0;
-        for (int j = 0; j < nums.length; j++) {
-            if (j == 0){
-                nums[i] = nums[j];
-                i++;
-                continue;
-            }
-            int preValue = nums[j - 1];
-            if (nums[j] != preValue){
-                nums[i] = nums[j];
-                i++;
-            }
-        }
-        return i;
+        int[] newNums = new int[nums.length];
+        Map<Integer,Integer> duplicates = new HashMap<>();
+
     }
 }

src/solution/test.java

@@ -6,9 +6,11 @@ import java.util.stream.Collectors;
 
 public class test {
     public static void main(String[] args) {
-        int[] nums = new int[]{1,2,3,4,4,5,6};
-        Solution.removeDuplicates(nums);
+        int[] nums = new int[]{3,2,2,3,1,2};
+        int[] nums1 = new int[]{1,2,3,0,0,0};
+        int length = Solution.removeElement(nums,3);
         System.out.println(nums);
+        System.out.println(length);
     }
 
 }