add code

Author: izbk

.idea/compiler.xml

@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resuorces" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
-</module>
-
+</module>

.idea/misc.xml

@@ -7,4 +7,5 @@
     <artifactId>getoffer</artifactId>
     <version>1.0</version>
 
+    <properties/>
 </project>

.idea/workspace.xml

@@ -0,0 +1,32 @@
+package com.atguigu.interview.juc;
+
+import java.util.concurrent.TimeUnit;
+
+class MyData{
+    // 可见性验证，可注释后体验效果
+    volatile int number = 0;
+    public void add(){
+        this.number = 10;
+    }
+}
+public class VolatileDemo {
+    public static void main(String[] args) {
+        MyData myData = new MyData();
+        new Thread(()->{
+            System.out.println(Thread.currentThread().getName());
+            try {
+                TimeUnit.SECONDS.sleep(3);
+            } catch(Exception e) {
+                e.printStackTrace();
+            }
+            myData.add();
+            System.out.println(Thread.currentThread().getName()+" updated number");
+        },"thread0").start();
+
+        while(myData.number == 0){
+            // main 循环等待
+        }
+        System.out.println(Thread.currentThread().getName()+" task is over");
+    }
+
+}