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JSpinner Programador Java Interfaz Gráfico GUI AWT Swing 1 Swing 2

import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; public class JSpinnerr extends JFrame {   private JLabel jLabel1 = new JLabel();   private JSpinner jSpinner1 = new JSpinner();   private JLabel jLabel2 = new JLabel();      public JSpinnerr(String title) {          super(title);     setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);     int frameWidth = 300;      int frameHeight = 300;     setSize(frameWidth, frameHeight);     Dimension d = Toolkit.getDefaultToolkit().getScreenSize();     int x = (d.width - getSize().width) / 2;     int y = (d.height - getSize().height) / 2;     setLocation(x, y);     setResizable(false);     Container cp = getContentPane();     cp.setLayout(null);            cp.setBackground(new Color(0x2BD59D));     jLabel1.setBounds(32, 24, 243, 73);     jLabel1.setText("JSpinner");     jLabel1.setFont(new Font("Gunplay 3D", Font.BOLD, 36));     jLabel1.setForeground(Color.MAGENTA);     cp.add(jLabel1);     jSpinner1.setBounds(72, 120, 169, 41);     jSpinner1.setModel(new SpinnerNumberModel(0,0,10,1));     cp.add(jSpinner1);     jLabel2.setBounds(72, 184, 179, 33);     jLabel2.setText("");     cp.add(jLabel2);         jSpinner1.addChangeListener(new ChangeListener() {        public void stateChanged(ChangeEvent evt) {          jSpinner1_stateChanged(evt);       }     });           setVisible(true);   }       public void jSpinner1_stateChanged(ChangeEvent evt) {     jLabel2.setText("El valor es: "+jSpinner1.getValue());        }        public static void main(String[] args) {     new JSpinnerr("JSpinnerr");   }    }