更新 Solution.java

src/solution/Solution.java

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

src/solution/test.java

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