一部の機能が意図したとおりに動作しない

私はNetbeansで現金登録プログラムを開発しています。 Eclipseで使用したときにうまくいきました。しかし、Netbeansを使用してGUIを変更した後は、機能が動作しません。（支払い、キャンセル）そして、私がニューオーダーボタンを押したときに、なぜ - オーダー - が出るのか分かりません。私のコードで何が問題になっていますか？お願いします！私は、NetBeansを使用して、いくつかのGUIを変更した後一部の機能が意図したとおりに動作しない

package point.of.sales; 

import javax.swing.JOptionPane; 
import java.text.DecimalFormat; 

public class NewJFrame extends javax.swing.JFrame { 

    public NewJFrame() { 
     initComponents(); 
    } 

    void initializeBill() 
    { 
     nTotal = 0; 
     txtBill.setText(spaces(35) + "- Order -"); 
     btnTomatoBasilLinguine.setEnabled(true); 
     btnLinguineCarbonara.setEnabled(true); 
     btnShrimpPasta.setEnabled(true); 
     btnGrilledSalmonSalad.setEnabled(true); 
     btnCapreseSalad.setEnabled(true); 
     btnCoke.setEnabled(true); 
     btnGingerale.setEnabled(true); 
    } 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jPanel5 = new javax.swing.JPanel(); 
     jTabbedPane1 = new javax.swing.JTabbedPane(); 
     jPanel7 = new javax.swing.JPanel(); 
     jPanel1 = new javax.swing.JPanel(); 
     btnCheeseSalad = new javax.swing.JButton(); 
     btnGrilledSalmonSalad = new javax.swing.JButton(); 
     btnCapreseSalad = new javax.swing.JButton(); 
     jPanel2 = new javax.swing.JPanel(); 
     btnNewOrder = new javax.swing.JButton(); 
     btnCancel = new javax.swing.JButton(); 
     btnPayment = new javax.swing.JButton(); 
     jScrollPane1 = new javax.swing.JScrollPane(); 
     txtBill = new javax.swing.JTextArea(); 
     jTextField1 = new javax.swing.JTextField(); 
     jPanel8 = new javax.swing.JPanel(); 
     btnShrimpPasta = new javax.swing.JButton(); 
     btnTomatoBasilLinguine = new javax.swing.JButton(); 
     btnLinguineCarbonara = new javax.swing.JButton(); 
     jPanel9 = new javax.swing.JPanel(); 
     btnBeer = new javax.swing.JButton(); 
     btnCoke = new javax.swing.JButton(); 
     btnGingerale = new javax.swing.JButton(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

     jPanel1.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 



     btnGrilledSalmonSalad.setText("Grilled Salmon Salad"); 
     btnGrilledSalmonSalad.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnGrilledSalmonSaladActionPerformed(evt); 
      } 
     }); 

     btnCapreseSalad.setText("Caprese Salad"); 
     btnCapreseSalad.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnCapreseSaladActionPerformed(evt); 
      } 
     }); 

     javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); 
     jPanel1.setLayout(jPanel1Layout); 
     jPanel1Layout.setHorizontalGroup(
      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel1Layout.createSequentialGroup() 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) 
        .addComponent(btnCheeseSalad, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
        .addComponent(btnGrilledSalmonSalad, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 167, Short.MAX_VALUE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addComponent(btnCapreseSalad, javax.swing.GroupLayout.PREFERRED_SIZE, 168, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
     ); 
     jPanel1Layout.setVerticalGroup(
      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel1Layout.createSequentialGroup() 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(btnGrilledSalmonSalad, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(btnCapreseSalad, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
       .addComponent(btnCheeseSalad, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(40, Short.MAX_VALUE)) 
     ); 

     jPanel2.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 

     btnNewOrder.setText("New Order"); 
     btnNewOrder.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnNewOrderActionPerformed(evt); 
      } 
     }); 

     btnCancel.setText("Cancel"); 

     btnPayment.setText("Payment"); 

     txtBill.setColumns(20); 
     txtBill.setRows(5); 
     jScrollPane1.setViewportView(txtBill); 

     javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2); 
     jPanel2.setLayout(jPanel2Layout); 
     jPanel2Layout.setHorizontalGroup(
      jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup() 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addComponent(btnNewOrder, javax.swing.GroupLayout.PREFERRED_SIZE, 97, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addComponent(btnPayment, javax.swing.GroupLayout.PREFERRED_SIZE, 111, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addComponent(btnCancel, javax.swing.GroupLayout.PREFERRED_SIZE, 99, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addGap(39, 39, 39)) 
      .addGroup(jPanel2Layout.createSequentialGroup() 
       .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 353, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addGap(0, 0, Short.MAX_VALUE)) 
     ); 
     jPanel2Layout.setVerticalGroup(
      jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup() 
       .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 362, Short.MAX_VALUE) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
       .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(btnNewOrder, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(btnCancel, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(btnPayment, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addContainerGap()) 
     ); 

     jTextField1.setHorizontalAlignment(javax.swing.JTextField.CENTER); 
     jTextField1.setText("Tasting Room"); 
     jTextField1.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jTextField1ActionPerformed(evt); 
      } 
     }); 

     jPanel8.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 

     btnShrimpPasta.setText("Shrimp Pasta"); 
     btnShrimpPasta.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnShrimpPastaActionPerformed(evt); 
      } 
     }); 

     btnTomatoBasilLinguine.setText("Tomato Basil Linguine"); 
     btnTomatoBasilLinguine.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnTomatoBasilLinguineActionPerformed(evt); 
      } 
     }); 

     btnLinguineCarbonara.setText("Linguine Carbonara"); 
     btnLinguineCarbonara.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnLinguineCarbonaraActionPerformed(evt); 
      } 
     }); 

     javax.swing.GroupLayout jPanel8Layout = new javax.swing.GroupLayout(jPanel8); 
     jPanel8.setLayout(jPanel8Layout); 
     jPanel8Layout.setHorizontalGroup(
      jPanel8Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel8Layout.createSequentialGroup() 
       .addGroup(jPanel8Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) 
        .addComponent(btnShrimpPasta, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
        .addComponent(btnTomatoBasilLinguine, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 167, Short.MAX_VALUE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addComponent(btnLinguineCarbonara, javax.swing.GroupLayout.PREFERRED_SIZE, 168, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
     ); 
     jPanel8Layout.setVerticalGroup(
      jPanel8Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel8Layout.createSequentialGroup() 
       .addGroup(jPanel8Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(btnTomatoBasilLinguine, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(btnLinguineCarbonara, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
       .addComponent(btnShrimpPasta, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(40, Short.MAX_VALUE)) 
     ); 

     jPanel9.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 

     btnBeer.setText("Beer"); 
     btnBeer.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnBeerActionPerformed(evt); 
      } 
     }); 

     btnCoke.setText("Coke "); 
     btnCoke.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnCokeActionPerformed(evt); 
      } 
     }); 

     btnGingerale.setText("Ginger Ale"); 
     btnGingerale.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       btnGingeraleActionPerformed(evt); 
      } 
     }); 

     javax.swing.GroupLayout jPanel9Layout = new javax.swing.GroupLayout(jPanel9); 
     jPanel9.setLayout(jPanel9Layout); 
     jPanel9Layout.setHorizontalGroup(
      jPanel9Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel9Layout.createSequentialGroup() 
       .addGroup(jPanel9Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) 
        .addComponent(btnBeer, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
        .addComponent(btnCoke, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 167, Short.MAX_VALUE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addComponent(btnGingerale, javax.swing.GroupLayout.PREFERRED_SIZE, 168, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
     ); 
     jPanel9Layout.setVerticalGroup(
      jPanel9Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel9Layout.createSequentialGroup() 
       .addGroup(jPanel9Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(btnCoke, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(btnGingerale, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
       .addComponent(btnBeer, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(40, Short.MAX_VALUE)) 
     ); 

     javax.swing.GroupLayout jPanel7Layout = new javax.swing.GroupLayout(jPanel7); 
     jPanel7.setLayout(jPanel7Layout); 
     jPanel7Layout.setHorizontalGroup(
      jPanel7Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel7Layout.createSequentialGroup() 
       .addContainerGap() 
       .addGroup(jPanel7Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 351, Short.MAX_VALUE) 
        .addComponent(jPanel8, javax.swing.GroupLayout.PREFERRED_SIZE, 351, Short.MAX_VALUE) 
        .addComponent(jPanel9, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 351, Short.MAX_VALUE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
       .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, 360, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap()) 
      .addGroup(jPanel7Layout.createSequentialGroup() 
       .addGap(153, 153, 153) 
       .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 461, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
     ); 
     jPanel7Layout.setVerticalGroup(
      jPanel7Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel7Layout.createSequentialGroup() 
       .addGap(6, 6, 6) 
       .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 42, Short.MAX_VALUE) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addGroup(jPanel7Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) 
        .addGroup(jPanel7Layout.createSequentialGroup() 
         .addComponent(jPanel8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
         .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
         .addComponent(jPanel9, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
        .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))) 
     ); 

     jTabbedPane1.addTab("Cash Register", jPanel7); 

     javax.swing.GroupLayout jPanel5Layout = new javax.swing.GroupLayout(jPanel5); 
     jPanel5.setLayout(jPanel5Layout); 
     jPanel5Layout.setHorizontalGroup(
      jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addComponent(jTabbedPane1) 
     ); 
     jPanel5Layout.setVerticalGroup(
      jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addComponent(jTabbedPane1) 
     ); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addComponent(jPanel5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addComponent(jPanel5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addContainerGap()) 
     ); 

     pack(); 
    }// </editor-fold>       
    private void addItem(String food, double price) 
    { 
     txtBill.setText(txtBill.getText()+"\n"+" "+food+PRICE_FORMAT.format(price)+"\n"); 
     nPreviousPrice = price; 
     nTotal +=price; 
    } 

    String spaces(int num) 
    { 
     String str=""; 
     for(int i=0; i<num; i++) 
      str+=" "; 
     return str; 
    } 

    double getAmout() 
    { 
     try { 
       String strAnswer = JOptionPane.showInputDialog(null, 
         "Please enter the amout paid: ", 
         "Amout Paid", JOptionPane.OK_CANCEL_OPTION); 
       return Double.parseDouble(strAnswer);} 
     catch (NumberFormatException e) 
     { 
      JOptionPane.showMessageDialog(null, "Please enter a number.", 
        "Number Format Exception", JOptionPane.OK_OPTION); 
      return -1; 
     } 
     catch (NullPointerException e) 
     { 
      System.out.println("Transaction Canceled"); 
      return -2; 
     } 
    } 

    double getAmount() 
    { 
     try { 
       String strAnswer = JOptionPane.showInputDialog(null, 
        "Please enter the amount paid: ", 
        "Amount Paid", JOptionPane.OK_CANCEL_OPTION); 
       return Double.parseDouble(strAnswer); 
      } 
     catch (NumberFormatException e) 
     { 
      JOptionPane.showMessageDialog(null, "Please enter a number.", 
        "Number Format Exception", JOptionPane.OK_OPTION); 
      return -1; 
     } 
     catch (NullPointerException e) 
     { 
      System.out.println("Transaction Canceled"); 
      return -2; 
     } 
    } 

    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {            
     // TODO add your handling code here: 
    }           

    private void btnTomatoBasilLinguineActionPerformed(java.awt.event.ActionEvent evt) {              
     addItem("Tomato Basil Linguine" + spaces(19),13); 
     btnPayment.setEnabled(true); 
     btnCancel.setEnabled(true);// TODO add your handling code here: 
    }              

    private void btnCokeActionPerformed(java.awt.event.ActionEvent evt) {           
     addItem("Coke" + spaces(52), 2); 
     btnPayment.setEnabled(true); 
     btnCancel.setEnabled(true); 
     repaint(); // TODO add your handling code here: 
    }          

    private void btnCapreseSaladActionPerformed(java.awt.event.ActionEvent evt) {             
      addItem("Caprese Salad" + spaces(33), 5); 
      btnPayment.setEnabled(true); 
      btnCancel.setEnabled(true); 
      repaint(); // TODO add your handling code here: 
    }            

    private void btnGingeraleActionPerformed(java.awt.event.ActionEvent evt) {            
      addItem("Gingerale" + spaces(44), 2); 
      btnPayment.setEnabled(true); 
      btnCancel.setEnabled(true); 
      repaint();  // TODO add your handling code here: 
    }            

    private void btnBeerActionPerformed(java.awt.event.ActionEvent evt) {           
      addItem("Beer" + spaces(53),3); 
      btnPayment.setEnabled(true); 
      btnCancel.setEnabled(true); 
      repaint();// TODO add your handling code here: 
    }          



    private void btnNewOrderActionPerformed(java.awt.event.ActionEvent evt) {            
      initializeBill(); 
      repaint();// TODO add your handling code here: 
    }           

    private void btnLinguineCarbonaraActionPerformed(java.awt.event.ActionEvent evt) {              
      addItem("Linguine Carbonara" + spaces(24),15); 
      btnPayment.setEnabled(true); 
      btnCancel.setEnabled(true); 
      repaint(); // TODO add your handling code here: 
    }              

    private void btnShrimpPastaActionPerformed(java.awt.event.ActionEvent evt) {            
      addItem("Shrimp Pasta" + spaces(35),14); 
      btnPayment.setEnabled(true); 
      btnCancel.setEnabled(true); 
      repaint();// TODO add your handling code here: 
    }            


    private void btnCalculateActionPerformed(java.awt.event.ActionEvent evt){ 
      nSubTotal = nTotal; 

      txtBill.setText(txtBill.getText() + "\n" + 
       "  " + "Total: " + spaces(41) + PRICE_FORMAT.format(nTotal) + "\n"); 

      btnPayment.setEnabled(false); 
      btnCancel.setEnabled(false); 
      btnTomatoBasilLinguine.setEnabled(false); 
      btnLinguineCarbonara.setEnabled(false); 
      btnShrimpPasta.setEnabled(false); 
      btnCoke.setEnabled(false); 
      btnGingerale.setEnabled(false); 

      // get amount paid by client 
      double nAnswer = getAmount(); 

      // if the cancel button is pressed, reinitialize. 
      if (nAnswer == DIALOG_CANCEL) 
       initializeBill(); 
      else 
      { 
       // while the client gives an insufficent amount, ask again 
       while (nAnswer < nSubTotal) 
       { 
        if (nAnswer != DIALOG_NOT_NUM) 
         JOptionPane.showMessageDialog(null, 
          "The amount paid must be at least " + 
          PRICE_FORMAT.format(nSubTotal), 
          "Insufficent Amount", JOptionPane.OK_OPTION); 
        nAnswer = getAmount(); 
        if (nAnswer == DIALOG_CANCEL) 
        { 
         initializeBill(); 
         return; 
        } 
       } 

       txtBill.setText(txtBill.getText() + "\n" + 
        "  " + "Paid: " + spaces(42) + 
        PRICE_FORMAT.format(nAnswer)); 
       txtBill.setText(txtBill.getText() + "\n" + 
        "  " + "Returned: " + spaces(33) + 
        PRICE_FORMAT.format(nAnswer-nSubTotal)); 
      } 
      repaint(); 
     }   

    private void btnCancelActionPerformed(java.awt.event.ActionEvent evt){ 
txtBill.setText(txtBill.getText() + "\n" + 
       "  " + strPreviousDrink + 
      spaces(40 - strPreviousDrink.length()) + "-" + 
      PRICE_FORMAT.format(nPreviousPrice) + "\n" + "  (Canceled)\n"); 
      nTotal -= nPreviousPrice; 
      btnCancel.setEnabled(false); 
      repaint(); 
     } 

    public static void main(String args[]) { 
     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(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (InstantiationException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (IllegalAccessException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } 
     java.awt.EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       new NewJFrame().setVisible(true); 
      } 
     }); 
    } 
    private final DecimalFormat PRICE_FORMAT = new DecimalFormat("$###.##"); 

    // flag, if the user does not enter a number in the dialog 
    private final int DIALOG_NOT_NUM = -1;        

    // flag, if the user cancels the dialog 
    private final int DIALOG_CANCEL = -2;  
    private double nTotal = 0, nSubTotal = 0, nPreviousPrice = 0; 
    private String strPreviousDrink; 
    // Variables declaration - do not modify      
    private javax.swing.JButton btnBeer, btnCancel, btnCapreseSalad, btnCheeseSalad, btnCoke, btnGingerale, btnGrilledSalmonSalad, btnLinguineCarbonara, btnNewOrder, btnPayment, btnShrimpPasta, btnTomatoBasilLinguine; 
    private javax.swing.JPanel jPanel1, jPanel2, jPanel5, jPanel7, jPanel8, jPanel9; 
    private javax.swing.JScrollPane jScrollPane1; 
    private javax.swing.JTabbedPane jTabbedPane1; 
    private javax.swing.JTextField jTextField1; 
    private javax.swing.JTextArea txtBill;  
}

出典

2016-08-30 Rina

私は短くしなければならなかった私の投稿は文字の制限のために。より多くの情報が必要な場合はお知らせください。 – Rina

1.早く助けを求めるには、[mcve]を投稿してください。 2.あなたのコードと投稿が示唆しているGUIビルダーを使用することをお勧めします。3. ActionListenerがJButtonに追加されている場所がわかりません – copeg

@copegでコメントされているように、コード全体は必要ありませんが、、より単純なもので問題を再現しようとして、そのコードをここに投稿してください。また、GUIビルダー（ドラッグアンドドロップ）を使用する代わりに、コーディングを自分で行うと、読んで理解しにくいスパゲッティコードが作成されるので、より良いことです。 – Frakcool

しかし、機能が動作していません。。。（お支払い、

をキャンセルあなたがそれに応じてアクションを処理するためにJButtonにActionListener実装を追加する必要がありますこれはあなたのbtnCancelとbtnPaymentの両方のために不足していることが例えばそうです：

btnCancel.addActionListener(new ActionListener(){ 
    @Override 
    public void actionPerformed(ActionEvent e){ 
     btnCancelActionPerformed(e); 
    } 
});

の場合あなたはGUIビルダーを使用していますが、私はそれに対して推奨します：コードは読みにくく、簡単に中断することができ、コードが構築された方法/理由の基礎がわからないときは、バグを診断するのが非常に難しくなります。

出典

2016-08-30 21:52:07 copeg

GUIビルダーから遠ざかります。 – Rina

一部の機能が意図したとおりに動作しない

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