Question

我正在查看代码，我无法弄清楚这个代码的问题是什么窗口没有显示内容，请提前帮助任何人！

我使用netbeans非常简单的摆动应用程序与窗口构建器构建，这次它没有显示所有窗口的内容没有设置正确或这是另一个问题我正在我的脑海里如何解决这个问题

＆＃13;

public class AddCoupon extends javax.swing.JFrame {
    private javax.swing.JTextField amount;
    private javax.swing.JButton cancel;
    private javax.swing.JLabel compName;
    private javax.swing.JLabel compName1;
    private javax.swing.JLabel compName2;
    private javax.swing.JLabel compPass;
    private javax.swing.JLabel compPass1;
    private javax.swing.JLabel compPass2;
    private javax.swing.JLabel compPass3;
    private javax.swing.JLabel compPass6;
    private javax.swing.JList<String> couponTypes;
    private javax.swing.JTextField endDate;
    private javax.swing.JTextField imgPath;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextArea massage;
    private javax.swing.JButton okBtn;
    private javax.swing.JTextField price;
    private javax.swing.JTextField startDate;
    private javax.swing.JTextField title;
	

	public AddCoupon() {
		super("Add Coupon");
		
		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(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
		          setLocationRelativeTo(null);
        setVisible(true);
      
   }

   /**
    * This method is called from within the constructor to initialize the form.
    * WARNING: Do NOT modify this code. The content of this method is always
    * regenerated by the Form Editor.
    */
   @SuppressWarnings("unchecked")
   // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
   private void initComponents() {

       compName = new javax.swing.JLabel();
       compPass = new javax.swing.JLabel();
       title = new javax.swing.JTextField();
       startDate = new javax.swing.JTextField();
       okBtn = new javax.swing.JButton();
       cancel = new javax.swing.JButton();
       jLabel1 = new javax.swing.JLabel();
       endDate = new javax.swing.JTextField();
       compPass1 = new javax.swing.JLabel();
       amount = new javax.swing.JTextField();
       compPass2 = new javax.swing.JLabel();
       compName1 = new javax.swing.JLabel();
       compPass3 = new javax.swing.JLabel();
       price = new javax.swing.JTextField();
       compName2 = new javax.swing.JLabel();
       jScrollPane1 = new javax.swing.JScrollPane();
       couponTypes = new javax.swing.JList<>();
       jScrollPane2 = new javax.swing.JScrollPane();
       massage = new javax.swing.JTextArea();
       compPass6 = new javax.swing.JLabel();
       imgPath = new javax.swing.JTextField();

       setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
       setAlwaysOnTop(true);
       setLocation(new java.awt.Point(0, 0));
       compName.setText("Coupon title :");

       compPass.setText("Start Date :");

       startDate.setText("MM/dd/yyyy");

       okBtn.setText("Ok");
       okBtn.addActionListener(new java.awt.event.ActionListener() {
           public void actionPerformed(java.awt.event.ActionEvent evt) {
               okBtnActionPerformed(evt);
           }
       });

       cancel.setText("Cancel");
       cancel.addActionListener(new java.awt.event.ActionListener() {
           public void actionPerformed(java.awt.event.ActionEvent evt) {
               cancelActionPerformed(evt);
           }
       });

       jLabel1.setText("Add New Coupon");

       endDate.setText("MM/dd/yyyy");

       compPass1.setText("End Date :");

       compPass2.setText("Massage:");

       compName1.setText("Amount :");

       compPass3.setText("Type");

       compName2.setText("Price :");

       couponTypes.setModel(new javax.swing.AbstractListModel<String>() {
			String[] strings = { "blah","blah" };
           public int getSize() { return strings.length; }
           public String getElementAt(int i) { return strings[i]; }
       });
       jScrollPane1.setViewportView(couponTypes);

       massage.setColumns(20);
       massage.setRows(5);
       jScrollPane2.setViewportView(massage);

       compPass6.setText("img path :");

       javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
       getContentPane().setLayout(layout);
       layout.setHorizontalGroup(
           layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
           .addGroup(layout.createSequentialGroup()
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                   .addGroup(layout.createSequentialGroup()
                       .addGap(86, 86, 86)
                       .addComponent(jLabel1))
                   .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                       .addGroup(layout.createSequentialGroup()
                           .addGap(30, 30, 30)
                           .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                               .addGroup(layout.createSequentialGroup()
                                   .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                       .addComponent(compName)
                                       .addComponent(compPass)
                                       .addComponent(compPass1))
                                   .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                   .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                       .addComponent(endDate, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
                                       .addComponent(startDate, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
                                       .addComponent(title, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)))
                               .addGroup(layout.createSequentialGroup()
                                   .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                       .addComponent(compName1)
                                       .addComponent(compPass3)
                                       .addComponent(compPass2))
                                   .addGap(29, 29, 29)
                                   .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                       .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 107, javax.swing.GroupLayout.PREFERRED_SIZE)
                                       .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
                                       .addComponent(amount, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)))))
                       .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                           .addContainerGap()
                           .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                               .addComponent(compName2, javax.swing.GroupLayout.PREFERRED_SIZE, 57, javax.swing.GroupLayout.PREFERRED_SIZE)
                               .addComponent(compPass6, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE))
                           .addGap(18, 18, 18)
                           .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                               .addComponent(price, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
                               .addComponent(imgPath, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))
                           .addGap(2, 2, 2))))
               .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
           .addGroup(layout.createSequentialGroup()
               .addGap(86, 86, 86)
               .addComponent(okBtn)
               .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
               .addComponent(cancel)
               .addGap(40, 40, 40))
       );
       layout.setVerticalGroup(
           layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
           .addGroup(layout.createSequentialGroup()
               .addGap(17, 17, 17)
               .addComponent(jLabel1)
               .addGap(18, 18, 18)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                   .addComponent(compName)
                   .addComponent(title, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
               .addGap(18, 18, 18)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                   .addComponent(compPass)
                   .addComponent(startDate, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
               .addGap(18, 18, 18)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                   .addComponent(compPass1)
                   .addComponent(endDate, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
               .addGap(18, 18, 18)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                   .addComponent(compName1)
                   .addComponent(amount, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                   .addGroup(layout.createSequentialGroup()
                       .addGap(20, 20, 20)
                       .addComponent(compPass3))
                   .addGroup(layout.createSequentialGroup()
                       .addGap(18, 18, 18)
                       .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)))
               .addGap(27, 27, 27)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                   .addComponent(compPass2)
                   .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE))
               .addGap(18, 18, 18)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                   .addComponent(price, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                   .addComponent(compName2))
               .addGap(18, 18, 18)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                   .addComponent(compPass6)
                   .addComponent(imgPath, 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)
               .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                   .addComponent(okBtn)
                   .addComponent(cancel))
               .addContainerGap())
       );

       pack();
   }// </editor-fold>             

   private void okBtnActionPerformed(java.awt.event.ActionEvent evt) {
	  
		
   }                                     

   private void cancelActionPerformed(java.awt.event.ActionEvent evt) {                                       
      dispose();
   }                                      


                
}

＆＃13;

Answer 1

您需要在构造函数中调用ìnitComponents()

public AddCoupon() {
    super("Add Coupon");

    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(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(AddCoupon.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    initComponents();                         <---- HERE
    setLocationRelativeTo(null);
    setVisible(true);

}

我得到这个窗口没有任何内容为什么？

1 个答案:

输出