JAVA Okienka Kreator

package e9Okienko;

public class OknoGlowne extends javax.swing.JFrame {

   public OknoGlowne() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        liczba1 = new javax.swing.JTextField();
        liczba2 = new javax.swing.JTextField();
        dodawanie = new javax.swing.JButton();
        razy = new javax.swing.JButton();
        Wyjscie2 = new javax.swing.JLabel();
        Wyjscie1 = new javax.swing.JLabel();
        Minus = new javax.swing.JButton();
        Wyjscie3 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        liczba1.setText("0");

        liczba2.setText("0");

        dodawanie.setText("Dodaj");
        dodawanie.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                dodawanieActionPerformed(evt);
            }
        });

        razy.setText("Razy");
        razy.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                razyActionPerformed(evt);
            }
        });

        Wyjscie2.setText("Wynik");

        Wyjscie1.setText("Wynik");

        Minus.setText("Odejmij");
        Minus.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                MinusActionPerformed(evt);
            }
        });

        Wyjscie3.setText("Wynik");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(liczba2, javax.swing.GroupLayout.DEFAULT_SIZE, 50, Short.MAX_VALUE)
                    .addComponent(liczba1))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(239, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addComponent(Minus, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(razy, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(dodawanie, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(Wyjscie2, javax.swing.GroupLayout.PREFERRED_SIZE, 64, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(Wyjscie1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 64, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addComponent(Wyjscie3, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 64, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(liczba1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(liczba2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 151, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(Minus)
                    .addComponent(Wyjscie3, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(razy)
                    .addComponent(Wyjscie2, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(dodawanie)
                    .addComponent(Wyjscie1, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap())
        );

        pack();
    }// </editor-fold>

    private void dodawanieActionPerformed(java.awt.event.ActionEvent evt) {
        int a = Integer.parseInt(liczba1.getText());
        int b = Integer.parseInt(liczba2.getText());
        int wynik = a + b;
        Wyjscie1.setText(String.valueOf(wynik));
        Wyjscie1.setText(""+wynik);
    }

    private void razyActionPerformed(java.awt.event.ActionEvent evt) {
        int a = Integer.parseInt(liczba1.getText());
        int b = Integer.parseInt(liczba2.getText());
        int wynik = a * b;
        Wyjscie2.setText(String.valueOf(wynik));
        Wyjscie2.setText(""+wynik);
    }

    private void MinusActionPerformed(java.awt.event.ActionEvent evt) {
        int a = Integer.parseInt(liczba1.getText());
        int b = Integer.parseInt(liczba2.getText());
        int wynik = a - b;
        Wyjscie3.setText(String.valueOf(wynik));
        Wyjscie3.setText(""+wynik);
    }

    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(OknoGlowne.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(OknoGlowne.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(OknoGlowne.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(OknoGlowne.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new OknoGlowne().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton Minus;
    private javax.swing.JLabel Wyjscie1;
    private javax.swing.JLabel Wyjscie2;
    private javax.swing.JLabel Wyjscie3;
    private javax.swing.JButton dodawanie;
    private javax.swing.JTextField liczba1;
    private javax.swing.JTextField liczba2;
    private javax.swing.JButton razy;
    // End of variables declaration
}