diff --git a/src/java/which-one-is-better-Boolean-or-boolean.md b/src/java/which-one-is-better-Boolean-or-boolean.md
index 70d8adce..47422217 100644
--- a/src/java/which-one-is-better-Boolean-or-boolean.md
+++ b/src/java/which-one-is-better-Boolean-or-boolean.md
@@ -1,3 +1,10 @@
+---
+date: 2022-06-02
+tag:
+- Java
+- Daily
+---
+
 # Boolean 还是 boolean？
 
 在 Java 中，对于布尔类型的变量、对象属性或方法参数的定义，到底是用包装类型 Boolean 还是基本类型 boolean 呢？
diff --git a/src/java/which-one-is-better-forEach-or-map.md b/src/java/which-one-is-better-forEach-or-map.md
index 312f0a61..549ca677 100644
--- a/src/java/which-one-is-better-forEach-or-map.md
+++ b/src/java/which-one-is-better-forEach-or-map.md
@@ -1,3 +1,10 @@
+---
+date: 2022-04-05
+tag:
+- Java
+- Daily
+---
+
 # forEach 还是 map？
 ## 背景
 遍历一个集合，在里面执行某种操作后，再依次返回每一个元素，常见的实现方式有：