Scale the shapes in Java

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
//from  w  w  w.j a  va 2 s.  co  m
import javax.swing.JComponent;
import javax.swing.JFrame;

class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Graphics2D g2d = (Graphics2D) g;

    g2d.setColor(new Color(150, 150, 150));
    g2d.fillRect(0, 0, 80, 50);

    AffineTransform tx1 = new AffineTransform();
    tx1.translate(110, 20);
    tx1.scale(0.5, 0.5);

    g2d.setTransform(tx1);
    g2d.fillRect(0, 0, 80, 50);

    AffineTransform tx2 = new AffineTransform();
    tx2.translate(200, 20);
    tx2.scale(1.5, 1.5);

    g2d.setTransform(tx2);
    g2d.fillRect(0, 0, 80, 50);
  }
}

public class Main {
  public static void main(String[] a) {
    JFrame window = new JFrame();
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setBounds(30, 30, 450, 450);
    window.getContentPane().add(new MyCanvas());
    window.setVisible(true);
  }
}