diff --git a/App.java b/App.java
index 78dc59c..8de25d1 100644
--- a/App.java
+++ b/App.java
@@ -8,7 +8,7 @@
 {
     public static void main( String[] args )
     {
-        System.out.println( "Hello World!" );
+        // System.out.println( "Hello World!" );
         StyleTestDemo.main(null);
     }
 }
diff --git a/StyleTestDemo.java b/StyleTestDemo.java
index 95f9cd0..797dc92 100644
--- a/StyleTestDemo.java
+++ b/StyleTestDemo.java
@@ -13,6 +13,7 @@
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
+import javax.swing.JScrollPane;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.FontUIResource;
@@ -30,7 +31,7 @@
 
    public StyleTestDemo() {
 
-      JPanel contentPane = new JPanel(new BorderLayout());
+      // JPanel contentPane = new JPanel(new BorderLayout());
       textArea = new RSyntaxTextArea();
 
       String[] syntaxis = new String[] { "My"};
@@ -61,7 +62,9 @@
       textArea.setFont(new FontUIResource("sansserif", Font.PLAIN, 20));
       // contentPane.add(new RTextScrollPane(textArea, false)); // 行番号を消す
 
-      setContentPane(contentPane);
+      // 画面部品(component)の組みたて
+      JScrollPane scrollPane = new JScrollPane(textArea);
+      getContentPane().add(scrollPane, BorderLayout.CENTER);
       setTitle("MySyntax Demo");
       setDefaultCloseOperation(EXIT_ON_CLOSE); //ウィンドウのXを押したらプログラムを終了する