JAVA 34 - プログラム倉庫

import java.awt.*;
import javax.swing.*;
public class ex04 extends JFrame {
   public static void main (String args[]) {
      new ex04();
   }

   public ex04() {
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      getContentPane().add(new MyJPanel());
      setSize(500,500);
      setTitle("練習");
      setVisible(true);
   }

   class MyJPanel extends JPanel {
      public MyJPanel(){setBackground(Color.white);}
      public void paintComponent(Graphics g) {
         super.paintComponent(g);
         Font font = new Font("Dialog", Font.PLAIN, 40);
         g.setFont(font);
         g.drawString("Well Come to java world !!", 100,100);
      }
   }
}