Create and rotate Graphics2D object

In this example, we create a new Graphics2D object (graphics2D) from original Graphics object (g), by calling it's create() method. Then rotate the Graphics2D object, by calling its rotate() method. After used, dispose it.

package javaswing;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.Box;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JavaTestSwing {
    
    static JFrameWin jFrameWindow;
    
    public static class MyComponent extends JComponent{
       
        Dimension myDimension = new Dimension(500, 500);

        @Override
        public Dimension getPreferredSize() {
            return myDimension;
        }

        @Override
        public Dimension getMaximumSize() {
            return myDimension;
        }

        @Override
        public Dimension getMinimumSize() {
            return myDimension;
        }

        @Override
        protected void paintComponent(Graphics g) {

            //fill background
            g.setColor(Color.gray);
            g.fillRect(0, 0, getWidth(), getHeight());
            
            g.setColor(Color.darkGray);
            g.fillRect(50, 50, 150, 150);
            
            //rotate about 0, 0
            Graphics2D graphics2D = (Graphics2D)g.create();
            graphics2D.rotate(Math.toRadians(45));
            graphics2D.setColor(Color.red);
            graphics2D.fillRect(50, 50, 150, 150);
            
            //rotate about 100, 100
            graphics2D = (Graphics2D)g.create();
            graphics2D.rotate(Math.toRadians(45), 100, 100);
            graphics2D.setColor(Color.blue);
            graphics2D.fillRect(50, 50, 150, 150);
            
            //dispose Graphics2D object
            graphics2D.dispose();
        }
    }
    
    public static class JFrameWin extends JFrame{
        public JFrameWin(){
            this.setTitle("java-buddy.blogspot.com");
            this.setSize(500, 500);
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
            MyComponent myComponent = new MyComponent();
             
            Box horizontalBox = Box.createHorizontalBox();

            horizontalBox.add(myComponent);
            this.add(horizontalBox);
        }
    }
    

    public static void main(String[] args){
        Runnable doSwingLater = new Runnable(){
            public void run() {
                jFrameWindow = new JFrameWin();
                jFrameWindow.setVisible(true);
            }
        };
        
        SwingUtilities.invokeLater(doSwingLater);
        
    }

}