diff --git a/history/009_wa3d_shape/src/main/java/com/gitee/drinkjava2/frog/util/Systemout.java b/history/009_wa3d_shape/src/main/java/com/gitee/drinkjava2/frog/util/Systemout.java
new file mode 100644
index 0000000..5c008df
--- /dev/null
+++ b/history/009_wa3d_shape/src/main/java/com/gitee/drinkjava2/frog/util/Systemout.java
@@ -0,0 +1,36 @@
+package com.gitee.drinkjava2.frog.util;
+
+/**
+ * Debug utility to replace System.out
+ * 
+ * @author Yong Zhu
+ * @since 2.0.5
+ */
+@SuppressWarnings("all")
+public class Systemout {
+    public static boolean allowPrint = true;
+
+    public static boolean isAllowPrint() {
+        return allowPrint;
+    }
+
+    public static void setAllowPrint(boolean allowPrint) {
+        Systemout.allowPrint = allowPrint;
+    }
+
+    public static void print(Object obj) {
+        if (allowPrint)
+            System.out.print(obj);
+    }
+
+    public static void println(Object obj) {
+        if (allowPrint)
+            System.out.println(obj);
+    }
+
+    public static void println() {
+        if (allowPrint)
+            System.out.println();
+    }
+
+}