JAVA SWING

package JavaApplication1;
/**
 *
 * @author dsanjurjo0804
 */
import javax.swing.*;
import javax.swing.JFrame;

public class JavaApplication1 extends JFrame {
private final JLabel lblNombre;
private final JLabel lblApellido;
private final JLabel lblConcentracion;
private final JLabel lblGenero;


    public JavaApplication1() {
    setLayout(null);
    lblNombre=new JLabel("Nombre");
    lblNombre.setBounds(0,0,300,200);
    add(lblNombre);
    lblApellido=new JLabel("Apellido");
    lblApellido.setBounds(0,30,300,200);
    add(lblApellido);
    lblConcentracion=new JLabel("Concentracion");
    lblConcentracion.setBounds(0,60,300,200);
    add(lblConcentracion);
    lblGenero=new JLabel("Genero");
    lblGenero.setBounds(0,90,300,200);
    add(lblGenero);
    }

    public static void main(String[] args) {
        JavaApplication1 refform = new JavaApplication1();
        refform.setBounds(20,20,500,400);
        refform.setVisible(true);

}//MAIN CLOSE

    }//CLASS CLOSE