diff --git a/src/FirstGUI.java b/src/FirstGUI.java
new file mode 100644
index 0000000..5461c24
--- /dev/null
+++ b/src/FirstGUI.java
@@ -0,0 +1,73 @@
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowListener;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.WindowAdapter;
+
+class MyThread extends Thread {
+    int num;
+    public void run(){
+        while(true){
+            System.out.println(num);
+            num++;
+            try {
+                Thread.sleep(1000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}
+
+class SelfActionJButton extends JButton implements ActionListener, Runnable {
+    int num;
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        System.out.println("Button [" + e.getActionCommand() + "] was pressed.");
+        // new MyThread().start();
+        new Thread(this).start();
+    }
+    public SelfActionJButton(String label){
+        super(label);
+        this.addActionListener(this);// new FirstGUI());
+    }
+    @Override
+    public void run() {
+        while(true){
+            System.out.println("["+num+"]");
+            num++;
+            try {
+                Thread.sleep(1000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}
+
+public class FirstGUI /*implements ActionListener*/ {
+
+    public static void main(String[] args) {
+        SelfActionJButton jb = new SelfActionJButton("ボタン");
+        // ActionListener( );
+
+        JFrame jf = new JFrame("FirstGUI");
+        jf.getContentPane().add(jb);
+        // jf.setSize(300, 300);
+        jf.pack();
+
+        jf.setVisible(true);
+        jf.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                System.exit(0);
+            }
+        });
+
+    }
+
+}