diff --git a/s-day05/src/com/inmind/thread07/Demo14.java b/s-day05/src/com/inmind/thread07/Demo14.java
new file mode 100644
index 0000000..bd7f27c
--- /dev/null
+++ b/s-day05/src/com/inmind/thread07/Demo14.java
@@ -0,0 +1,22 @@
+package com.inmind.thread07;
+/*
+多线程的实现（方式一）
+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方法才能启动线程
+ */
+public class Demo14 {
+    public static void main(String[] args) {
+        //创建子线程对象
+        MyThread myThread = new MyThread();
+        //启动线程
+        myThread.start();
+        System.out.println("-------------");
+        for (int i = 0; i < 100; i++) {
+            System.out.println("hello world");
+        }
+        System.out.println("程序结束");
+    }
+}
diff --git a/s-day05/src/com/inmind/thread07/MyThread.java b/s-day05/src/com/inmind/thread07/MyThread.java
new file mode 100644
index 0000000..caab4a9
--- /dev/null
+++ b/s-day05/src/com/inmind/thread07/MyThread.java
@@ -0,0 +1,12 @@
+package com.inmind.thread07;
+
+//自定义线程类
+public class MyThread extends Thread{
+    @Override
+    public void run() {//线程任务代码
+        //打印100次"hello java"
+        for (int i = 0; i < 100; i++) {
+            System.out.println("hello java");
+        }
+    }
+}