ｊ１０２０ - プログラム倉庫

import javax.swing.*;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.*;
import java.awt.Color;

public class game1020 extends JPanel{

 public static void main(String[] args){
   JFrame frame = [[new]] JFrame();

   game1020 app = new game1020();
   frame.getContentPane().add(app);

   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setBounds(10, 10, 300, 200);
   frame.setTitle("[[タイトル]]");
   frame.setVisible(true);
 }

 public void paintComponent(Graphics g){
   Graphics2D g2 = (Graphics2D)g;

   Rectangle2D.Double rec1
     = new Rectangle2D.Double(10.0d, 10.0d, [[120]].0d, 80.0d);

   Rectangle2D.Double rec2
     = new Rectangle2D.Double(50.0d, 40.0d, 180.0d, 70.0d);

   g2.setPaint(Color.BLUE);
   g2.draw([[rec]]1);
   g2.fill(rec2);
 }

}