diff --git a/javaSE-day01/src/com/inmind/calendar03/Demo11.java b/javaSE-day01/src/com/inmind/calendar03/Demo11.java
new file mode 100644
index 0000000..0be670d
--- /dev/null
+++ b/javaSE-day01/src/com/inmind/calendar03/Demo11.java
@@ -0,0 +1,19 @@
+package com.inmind.calendar03;
+
+import java.util.Calendar;
+import java.util.Date;
+
+/*
+public Date getTime() ：返回一个表示此Calendar时间值（从历元到现在的毫秒偏移量）的Date对象。
+ */
+public class Demo11 {
+    public static void main(String[] args) {
+        Calendar calendar = Calendar.getInstance();
+        calendar.add(Calendar.YEAR,-1);
+        Date date1 = calendar.getTime();//日历类的getTime，获取的是当前时间的日期对象
+        Date date2 = new Date();
+        long beginTime = date1.getTime();//日期类的getTime，获取基准时间到当前时间的毫秒值
+        long endTime = date2.getTime();
+        System.out.println(endTime-beginTime);
+    }
+}