import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Rotate extends JPanel {
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(new Color(150, 150, 150));
g2d.fillRect(20, 20, 80, 50);
g2d.translate(180, -150);
g2d.rotate(Math.PI / 4);
g2d.fillRect(20, 20, 80, 50);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Rotation");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new Rotate());
frame.setSize(300, 200);
frame.setVisible(true);
}
}