Rotation13.java

package hw;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;

class Rotation extends JPanel {
    private void doDrawing(Graphics g) {
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setPaint(new Color(150, 150, 150));
        g2d.fillRect(40, 40, 100, 70);
        g2d.translate(200, -50);
        g2d.rotate(Math.PI/4);
        g2d.fillRect(100,100, 90, 70);
    }
    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        doDrawing(g);
    }
    private void rotate (double d) {
        throw new UnsupportedOperationException("Error."); 
    }
}
public class Rotation13 extends JFrame {
    
    public Rotation13() {
        initUI();
    }
    private void initUI() {
        setTitle("Rotation Example: ");
        add(new Rotation());
        setSize(500, 500);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
			
			public void run() {
				// TODO Auto-generated method stub
				
            	Rotation13 Rot= new Rotation13();
                Rot.setVisible(true);
            }
        });                    
    }
}