import javax.swing.*;public class ViewTest{ public static void main(String[] args) { NewFrame frame = new NewFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }}class NewFrame extends JFrame{ public NewFrame() { setTitle("ViewTest"); setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); } public static final int DEFAULT_WIDTH = 300; public static final int DEFAULT_HEIGHT = 200;}