using [java] java.awt
using [java] javax.swing
using concurrent

class Hello
{
    Void main()
    {
        canvas := Canvas()
        frame := JFrame("Hello, World")
        {
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
            add(canvas)
            setSize(640, 480)
            setVisible(true)
            canvas.createBufferStrategy(2)
            strategy := canvas.getBufferStrategy
            g2 := (Graphics2D)strategy.getDrawGraphics
            while(true)
            {
                g2.drawString("Hello, Java 2D World!", 0, 16 )
                strategy.show
                Actor.sleep(200ms)
            }
        }
        Actor.sleep(Duration.maxVal)
    }
}