Add Solution.java to problems 0203

Author: huaxu1024

solution/0203.Remove Linked List Elements/Solution2.java

@@ -0,0 +1,23 @@
+/**
+ * Definition for singly-linked list.
+ * public class ListNode {
+ *     int val;
+ *     ListNode next;
+ *     ListNode(int x) { val = x; }
+ * }
+ */
+class Solution {
+    public ListNode removeElements(ListNode head, int val) {
+        ListNode root = new ListNode(0);
+        root.next = head;
+        ListNode res = root;
+        while (root.next != null) {
+            if (root.next.val == val) {
+                root.next = root.next.next;
+            } else {
+                root = root.next;
+            }
+        }
+        return res.next;
+    }
+}