import javax.swing.*;
import java.awt.*;
public class NFrame extends JFrame
{
	public NFrame()
	{
		setLocation(50,100);
		setTitle("Este é NFrame ( um JFrame personalizado )");
		setSize(600,450);
		setUndecorated(true);
		getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
		getRootPane().setBorder(BorderFactory.createLineBorder(Color.red,3));
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
	public static void main(String arg[])
	{
		new NFrame().setVisible(true);
	}
}