import java.awt.Graphics
import java.awt.Graphics2D
import javax.swing.*
 
class Hello extends JFrame {
 
    static void main(args) {
        Hello frame = new Hello("Hello, World")
        frame.setVisible(true)
    }
 
    Hello( String title ) {
        super( title )
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
        setSize(640, 480)
 
        HelloPanel panel = new HelloPanel()
        add( panel )
    }
}
 
class HelloPanel extends JPanel {
    public void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D)g
        g2.drawString("Hello, Java2D World!", 0, 16)
    }
}