diff --git a/day02/src/com/inmind/Demo04.java b/day02/src/com/inmind/Demo04.java
new file mode 100644
index 0000000..1495878
--- /dev/null
+++ b/day02/src/com/inmind/Demo04.java
@@ -0,0 +1,16 @@
+package com.inmind;
+/*
+小数的强转为整数:直接将小数点后面的数给“砍掉”
+*/
+public class Demo04 {
+    public static void main(String[] args) {
+        //定义一个double的浮点数
+        double d = 3.94;
+//        float d = 3.94F;
+        System.out.println("变量d的值："+d);
+        //将double强转为整数
+        //小范围数据类型 变量名 = (小范围数据类型)大范围数据类型
+        int i = (int)d;
+        System.out.println("变量i的值："+i);
+    }
+}