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

class Hello
{
    Void main()
    {
        label := JLabel("Hello, Swing World!")
        {
            setVerticalAlignment(JLabel.TOP)
        }
        
        frame := JFrame("Hello, World")
        {
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
            getContentPane.add(label)
            setSize(640, 480)
            add(label)
            setVisible(true)
        }

        Actor.sleep(Duration.maxVal)
    }
}