Move the orginal point of the coordinate in Java

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
/* w  w  w .j a  v  a2 s .com*/
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(20, 20, 80, 50);
    g2d.translate(150, 50);
    g2d.fillRect(20, 20, 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);
  }
}