diff --git a/java/BadCode.java b/java/BadCode.java
new file mode 100644
index 0000000000000000000000000000000000000000..d86f3c28553a9f66beca7a8f332941547eb889cc
--- /dev/null
+++ b/java/BadCode.java
@@ -0,0 +1,29 @@
+
+/**
+ * 大神留步，帮我看个问题.
+ * @User: jspp@qq.com
+ * @Date: 2019/5/27 10:56
+ * @Desc  
+ * @Param 
+ */
+public class BadCode {
+
+    /**
+     * 计算总数
+     */
+     public void countDemo(){
+         int num = 0;
+         for (int i=0;i<100;i++){
+             num = num ++;
+             /**
+              *  do something
+              */
+         }
+         System.out.println(num);
+     }
+    /**
+     * 输出结果：num=0
+     * 然后 我叫了个大神来我帮我分析下。囧
+     */
+
+}