diff --git a/problems/0112.路径总和.md b/problems/0112.路径总和.md
index 718a2f5b..41d8b802 100644
--- a/problems/0112.路径总和.md
+++ b/problems/0112.路径总和.md
@@ -305,7 +305,34 @@ public:
 
 
 Java：
+```Java
+class Solution {
+   public boolean hasPathSum(TreeNode root, int targetSum) {
+        if (root == null) {
+            return false;
+        }
+        targetSum -= root.val;
+        // 叶子结点
+        if (root.left == null && root.right == null) {
+            return targetSum == 0;
+        }
+        if (root.left != null) {
+            boolean left = hasPathSum(root.left, targetSum);
+            if (left) {// 已经找到
+                return true;
+            }
+        }
+        if (root.right != null) {
+            boolean right = hasPathSum(root.right, targetSum);
+            if (right) {// 已经找到
+                return true;
+            }
+        }
+        return false;
+    }
+}
 
+```
 
 Python：