diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..9a874b5
--- /dev/null
+++ b/.DS_Store
Binary files differ
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index e256158..82b4fe1 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -7,6 +7,7 @@
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.release=enabled
 org.eclipse.jdt.core.compiler.source=11
diff --git a/a b/a
new file mode 100644
index 0000000..1bf5395
--- /dev/null
+++ b/a
@@ -0,0 +1,18 @@
+package com.original_game.janken;
+ 
+import javax.swing.JFrame;
+ 
+public class GameMain {
+ 
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		//ウィンドウの表示
+		JFrame frame = new JFrame("じゃんけんゲーム");
+		frame.setSize(640, 480);
+		frame.setLocationRelativeTo(null);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.setResizable(false);
+		frame.setVisible(true);
+	}
+ 
+}
diff --git a/src/Frac.java b/src/Frac.java
index ab620a6..2065f2c 100644
--- a/src/Frac.java
+++ b/src/Frac.java
@@ -3,7 +3,7 @@
 	// 確認用
 	
 	public static void main(String[] args) {
-		Frac d1_3 = new Frac(1,3);
+		Frac d1_3 = new Frac(2,3);
 		Frac d1_2 = new Frac(1,2);
 		Frac plus = d1_3.tasu(d1_2);
 		d1_3.print(); System.out.print("+ "); d1_2.print(); System.out.print("= ");
diff --git a/src/j1/a b/src/j1/a
new file mode 100644
index 0000000..1bf5395
--- /dev/null
+++ b/src/j1/a
@@ -0,0 +1,18 @@
+package com.original_game.janken;
+ 
+import javax.swing.JFrame;
+ 
+public class GameMain {
+ 
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		//ウィンドウの表示
+		JFrame frame = new JFrame("じゃんけんゲーム");
+		frame.setSize(640, 480);
+		frame.setLocationRelativeTo(null);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.setResizable(false);
+		frame.setVisible(true);
+	}
+ 
+}
diff --git a/src/j7/Test.java b/src/j7/Test.java
new file mode 100644
index 0000000..0635d24
--- /dev/null
+++ b/src/j7/Test.java
@@ -0,0 +1,22 @@
+package j7;
+
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowAdapter;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+
+public class Test extends JFrame {
+    public static void main(String[] args) {
+        Test t = new Test();
+        t.getContentPane().add(new JButton("hoge"));
+        t.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                System.exit(0);
+            }
+        });
+        t.pack();
+        t.setVisible(true);
+    }
+}