添加0450.删除二叉搜索树中的节点.mdJava解法

problems/0450.删除二叉搜索树中的节点.md

@@ -278,6 +278,33 @@ class Solution {
     }
 }
 ```
+```java
+// 解法2
+class Solution {
+    public TreeNode deleteNode(TreeNode root, int key) {
+        if (root == null) return root;
+        if (root.val == key) {
+            if (root.left == null) {
+                return root.right;
+            }
+            else if (root.right == null) {
+                return root.left;
+            }
+            else{
+                TreeNode cur = root.right;
+                while (cur.left != null) {
+                    cur = cur.left;
+                }
+                cur.left = root.left;
+                root = root.right;
+                return root;
+            }
+        }
+        if (root.val > key) root.left = deleteNode(root.left, key);
+        if (root.val < key) root.right = deleteNode(root.right, key);
+        return root;
+    }
+```
 
 ## Python