diff --git a/problems/1207.独一无二的出现次数.md b/problems/1207.独一无二的出现次数.md
index 377d9ebf..c1720430 100644
--- a/problems/1207.独一无二的出现次数.md
+++ b/problems/1207.独一无二的出现次数.md
@@ -77,6 +77,28 @@ public:
 
 Java：
 
+```java
+class Solution {
+    public boolean uniqueOccurrences(int[] arr) {
+        int[] count = new int[2002];
+        for (int i = 0; i < arr.length; i++) {
+            count[arr[i] + 1000]++; // 防止负数作为下标
+        }
+        boolean[] flag = new boolean[1002]; // 标记相同频率是否重复出现
+        for (int i = 0; i <= 2000; i++) {
+            if (count[i] > 0) {
+                if (flag[count[i]] == false) {
+                    flag[count[i]] = true;
+                } else {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+}
+```
+
 Python：
 
 Go：
@@ -89,4 +111,3 @@ JavaScript：
 * 知识星球：[代码随想录](https://mp.weixin.qq.com/s/QVF6upVMSbgvZy8lHZS3CQ)
 <div align="center"><img src=../pics/公众号.png width=450 alt=> </img></div>
 
-