diff --git a/.obsidian/plugins/keep-the-rhythm/data.json b/.obsidian/plugins/keep-the-rhythm/data.json
index b40d059..eed3748 100644
--- a/.obsidian/plugins/keep-the-rhythm/data.json
+++ b/.obsidian/plugins/keep-the-rhythm/data.json
@@ -511,11 +511,11 @@
         }
       },
       "2025-08-18": {
-        "totalDelta": 334,
+        "totalDelta": 461,
         "files": {
           "A1-Work/语言/Java/基础学习.md": {
             "initial": 7534,
-            "current": 7868
+            "current": 7995
           }
         }
       }
diff --git a/A1-Work/语言/Java/基础学习.md b/A1-Work/语言/Java/基础学习.md
index 947b9e0..efc2006 100644
--- a/A1-Work/语言/Java/基础学习.md
+++ b/A1-Work/语言/Java/基础学习.md
@@ -319,3 +319,16 @@ Error 为系统内部错误，不应该由应用程序抛出，应用程序应
 > [!warning] 注意
 > 一个方法必须声明所有可能抛出的已检查异常，而未检查异常要么不可控（Error），要么就避免发生（RuntimeException）。
 
+
+
+## JDK 特性
+
+### JDK7
+1. 合并的 `catch` 子句：
+```Java
+try {
+    code
+} catch (FileNotFoundException | UnknownHostException e) {
+    code
+}
+```
\ No newline at end of file