diff --git a/s-day05/src/com/inmind/thread02/Demo13.java b/s-day05/src/com/inmind/thread02/Demo13.java
new file mode 100644
index 0000000..f54205a
--- /dev/null
+++ b/s-day05/src/com/inmind/thread02/Demo13.java
@@ -0,0 +1,20 @@
+package com.inmind.thread02;
+/*
+    在java中使用一个类Thread来表示一个线程.
+
+    启动多线程的方式一:
+    1.定义一个子类继承Thread
+    2.重写run方法
+    3.创建子类对象,调用start方法启动
+ */
+public class Demo13 {
+    public static void main(String[] args) {
+        MyThread myThread = new MyThread();
+        myThread.start();//启动线程，执行线程任务run()
+        System.out.println("--------");
+        for (int i = 0; i < 100; i++) {
+            System.out.println("hello java");
+        }
+        System.out.println("程序结束");
+    }
+}
diff --git a/s-day05/src/com/inmind/thread02/MyThread.java b/s-day05/src/com/inmind/thread02/MyThread.java
new file mode 100644
index 0000000..bbfcf96
--- /dev/null
+++ b/s-day05/src/com/inmind/thread02/MyThread.java
@@ -0,0 +1,13 @@
+package com.inmind.thread02;
+
+public class MyThread extends Thread{//线程类
+
+
+    @Override
+    public void run() {
+        //定义该线程的任务
+        for (int i = 0; i < 100; i++) {
+            System.out.println("hello JS");
+        }
+    }
+}