diff --git a/problems/0102.二叉树的层序遍历.md b/problems/0102.二叉树的层序遍历.md
index dde5af47..b9bc05e0 100644
--- a/problems/0102.二叉树的层序遍历.md
+++ b/problems/0102.二叉树的层序遍历.md
@@ -1597,6 +1597,43 @@ public:
 ```
 
 Java： 
+```java
+class Solution {
+
+    public int minDepth(TreeNode root){
+        if (root == null) {
+            return 0;
+        }
+
+        Queue<TreeNode> queue = new LinkedList<>();
+        queue.offer(root);
+        int depth = 0;
+
+        while (!queue.isEmpty()){
+
+            int size = queue.size();
+            depth++;
+
+            TreeNode cur = null;
+            for (int i = 0; i < size; i++) {
+                cur = queue.poll();
+
+                //如果当前节点的左右孩子都为空，直接返回最小深度
+                if (cur.left == null && cur.right == null){
+                    return depth;
+                }
+
+                if (cur.left != null) queue.offer(cur.left);
+                if (cur.right != null) queue.offer(cur.right);
+            }
+
+
+        }
+
+        return depth;
+    }
+}
+```
 
 
 Python 3：