diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..18d341e
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,21 @@
+{
+    // IntelliSense を使用して利用可能な属性を学べます。
+    // 既存の属性の説明をホバーして表示します。
+    // 詳細情報は次を確認してください: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "java",
+            "name": "Launch Current File",
+            "request": "launch",
+            "mainClass": "${file}"
+        },
+        {
+            "type": "java",
+            "name": "Launch App",
+            "request": "launch",
+            "mainClass": "App",
+            "projectName": "JavaDesignPattern_7f164bb0"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/bin/App.class b/bin/App.class
deleted file mode 100644
index a228130..0000000
--- a/bin/App.class
+++ /dev/null
Binary files differ
diff --git a/bin/Urashima.class b/bin/Urashima.class
new file mode 100644
index 0000000..458c7e8
--- /dev/null
+++ b/bin/Urashima.class
Binary files differ
diff --git a/src/App.java b/src/App.java
deleted file mode 100644
index 0a839f9..0000000
--- a/src/App.java
+++ /dev/null
@@ -1,5 +0,0 @@
-public class App {
-    public static void main(String[] args) throws Exception {
-        System.out.println("Hello, World!");
-    }
-}
diff --git a/src/Urashima.java b/src/Urashima.java
new file mode 100644
index 0000000..0e8ed8c
--- /dev/null
+++ b/src/Urashima.java
@@ -0,0 +1,6 @@
+public class Urashima {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Hello, World!");
+        
+    }
+}