Build the most basic program window

public class JRadioButtonTest {
	
	
	public JRadioButtonTest() {
		JFrame f = new JFrame("Program window");//Create a JFrame window
		f.setVisible(true);//This sentence must be present, otherwise the window cannot be displayed
		
	}
	public static void main(String[] args) {
		new JRadioButtonTest();
	}

}