import javax.swing.*;
import java.awt.BorderLayout;

public class Interface extends JFrame 
{

		public Interface ()
		{
				
    			setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
				getContentPane().setLayout(new BorderLayout());
    			getContentPane().add(new JLabel("Minha Primeira Interface em Java Swing"), BorderLayout.CENTER);
    			setSize(300, 500);        
    			setVisible(true);
		}
  		public static void main(String[] args) 
  		{
    			new Interface();
  		}		
 
}