按行选择编辑jtable内容

我有一个具有Editbutton的类并将其设置为actionListener。我写我的整个类代码。按行选择编辑jtable内容

我有3类，

public class UserPage extends JFrame implements ActionListener { 

private AllUser userModel; 
private JTable uTable; 
JButton editButton; 

public UserPage() { 
    setTitle("All User Information"); 
    userModel = new AllUser(); 
    uTable = new JTable(userModel); 
    add(new JScrollPane(uTable), BorderLayout.CENTER); 
    add(buttonPanels(), BorderLayout.PAGE_START); 
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    this.setSize(800, 600); 
    this.setLocation(300, 60); 
} 

public final JPanel buttonPanels() { 
    JPanel buttonsPanel = new JPanel(new FlowLayout(FlowLayout.LEFT)); 

    editButton=new JButton("Edit"); 

    editButton.addActionListener(this); 

    buttonsPanel.add(editButton); 

    return buttonsPanel; 
} 

@Override 
public void actionPerformed(ActionEvent e) { 
    if(e.getSource()== editButton){ 
     int selectedRow=uTable.getSelectedRow(); 
     if(selectedRow>0){ 
      editUser(selectedRow); 

     } 
     else{ 
      JOptionPane.showMessageDialog(null, "Select a row"); 
     } 

    } 
} 

public static void main(String[] args) { 
    new UserPage().setVisible(true); 
} 

public void editUser(int row){ 
    UserInformation userInf=new UserInformation(); 
    userModel.getSelectedMember(row); 
    NewUserFrame_Edit edit = new NewUserFrame_Edit(userInf); 
} 
}

其他类：其他类：

public class NewUserFrame_Edit extends javax.swing.JFrame { 

public NewUserFrame_Edit(UserInformation userinf) { 
    initComponents(); 
    setLocation(390, 20); 

    jTextField1.setText(userinf.getFname()); 
    jTextField2.setText(userinf.getLname()); 

    if(userinf.getGender().equals("Male")){  
     jRadioButton1.setSelected(true); 
    } 
    else{ 
     jRadioButton2.setSelected(true); 
    } 

    jTextField3.setText(userinf.getDate()); 
    setVisible(true); 
} 

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

    jLabel1 = new javax.swing.JLabel(); 
    jLabel2 = new javax.swing.JLabel(); 
    jLabel3 = new javax.swing.JLabel(); 
    jLabel4 = new javax.swing.JLabel(); 
    jTextField1 = new javax.swing.JTextField(); 
    jTextField2 = new javax.swing.JTextField(); 
    jTextField3 = new javax.swing.JTextField(); 
    jLabel5 = new javax.swing.JLabel(); 
    jRadioButton1 = new javax.swing.JRadioButton(); 
    jRadioButton2 = new javax.swing.JRadioButton(); 
    updateButton = new javax.swing.JButton(); 
    cancelButton = new javax.swing.JButton(); 

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

    jLabel1.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N 
    jLabel1.setForeground(new java.awt.Color(51, 0, 0)); 
    jLabel1.setText("Edit User"); 

    jLabel2.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N 
    jLabel2.setText("First Name"); 

    jLabel3.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N 
    jLabel3.setText("Last Name"); 

    jLabel4.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N 
    jLabel4.setText("Date"); 

    jLabel5.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N 
    jLabel5.setText("Gender"); 

    jRadioButton1.setText("Male"); 

    jRadioButton2.setText("Female"); 

    updateButton.setText("Update"); 
    updateButton.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      updateButtonActionPerformed(evt); 
     } 
    }); 

    cancelButton.setText("Cancel"); 

    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(106, 106, 106) 
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
         .addComponent(jLabel2) 
         .addComponent(jLabel3) 
         .addComponent(jLabel5) 
         .addComponent(jLabel4)) 
        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
         .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) 
          .addComponent(jTextField2) 
          .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 189, javax.swing.GroupLayout.PREFERRED_SIZE)) 
         .addGroup(layout.createSequentialGroup() 
          .addGap(10, 10, 10) 
          .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
           .addComponent(jRadioButton2) 
           .addComponent(jRadioButton1))) 
         .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) 
          .addGroup(layout.createSequentialGroup() 
           .addComponent(updateButton) 
           .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
           .addComponent(cancelButton)) 
          .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 219, javax.swing.GroupLayout.PREFERRED_SIZE)))) 
       .addGroup(layout.createSequentialGroup() 
        .addGap(292, 292, 292) 
        .addComponent(jLabel1))) 
      .addContainerGap(258, Short.MAX_VALUE)) 
    ); 
    layout.setVerticalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(layout.createSequentialGroup() 
      .addGap(21, 21, 21) 
      .addComponent(jLabel1) 
      .addGap(51, 51, 51) 
      .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
       .addComponent(jLabel2) 
       .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
      .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
       .addComponent(jLabel3) 
       .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
      .addGap(32, 32, 32) 
      .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
       .addComponent(jLabel5) 
       .addComponent(jRadioButton1)) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
      .addComponent(jRadioButton2) 
      .addGap(35, 35, 35) 
      .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) 
       .addComponent(jLabel4) 
       .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 89, Short.MAX_VALUE) 
      .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
       .addComponent(updateButton) 
       .addComponent(cancelButton)) 
      .addGap(52, 52, 52)) 
    ); 

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

private void updateButtonActionPerformed(java.awt.event.ActionEvent evt) {            
    //Stil has not code, because first jtextfields should fill with old data 

}            

public static void main(String args[]) { 

    java.awt.EventQueue.invokeLater(new Runnable() { 
     @Override 
     public void run() { 
      new NewUserFrame_Edit(new UserInformation()); 
     } 
    }); 
} 
// Variables declaration - do not modify      
private javax.swing.JButton cancelButton; 
private javax.swing.JLabel jLabel1; 
private javax.swing.JLabel jLabel2; 
private javax.swing.JLabel jLabel3; 
private javax.swing.JLabel jLabel4; 
private javax.swing.JLabel jLabel5; 
private javax.swing.JRadioButton jRadioButton1; 
private javax.swing.JRadioButton jRadioButton2; 
private javax.swing.JTextField jTextField1; 
private javax.swing.JTextField jTextField2; 
private javax.swing.JTextField jTextField3; 
private javax.swing.JButton updateButton; 
// End of variables declaration     
}

我喜欢当我prees按钮，我NewUserFrame_Edit类文本框应该是旧的数据填写。但这种例外ocure：

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 
at myproject.Library.NewUserFrame_Edit.<init>(NewUserFrame_Edit.java:13) 
at myproject.Library.NewUserFrame_Edit$2.run(NewUserFrame_Edit.java:148) 
...

我的用户信息类：

public class UserInformation { 

private String Fname; 
private String Lname; 
private String ID; 
private String Gender; 
private String Date; 

public String getFname() { 
    return Fname; 
} 

public void setFname(String fname) { 
    this.Fname = fname; 
} 

public String getLname() { 
    return Lname; 
} 

public void setLname(String lname) { 
    this.Lname = lname; 
} 

public String getID() { 
    return ID; 
} 

public void setID(String i_d) { 
    this.ID = i_d; 
} 

public String getGender() { 
    return Gender; 
} 

public void setGender(String gndr) { 
    this.Gender = gndr; 
} 

public String getDate() { 
    return Date; 
} 

public void setDate(String date) { 
    this.Date = date; 
} 

@Override 
public String toString() { 
    return ID + "  " + Fname + "  " 
      + Lname + "  " + Gender + "  " + Date + "\n"; 
} 
}

来源

2013-02-25 Sajad

这是DeafultTableModel（只覆盖isCellEditable＆getColumnClass）和FileReader（从SwingWorker调用）的工作，简单的一个类，可能有70-90个代码行 – mKorbel 2013-02-28 09:35:34

请学习java命名约定并坚持使用它们。 – kleopatra 2013-02-28 10:57:53

@kleopatra你能解释更多吗？ – Sajad 2013-02-28 19:16:32

由于@Robin陈述（+1他），问题是这种方法中：

public void editUser(int row) 
{ 
    UserInformation userInf = new UserInformation(); 
    userModel.getSelectedMember(row); 
    NewUserFrame_Edit edit = new NewUserFrame_Edit(userInf); 
}

此时应更换：

UserInformation userInf = new UserInformation();

有：

UserInformation userInf = userModel.getSelectedMember(row);

它从所选行的表模型中获取数据。

来源

2013-02-28 21:37:09

感谢您的回答，50个声望将授予您... – Sajad 2013-03-01 08:02:12

享受.......... – Sajad 2013-03-01 09:19:19

很难说没有的NewUserFrame_Edit类的全部代码，但堆栈跟踪清楚地表明，在13号线的东西是null。

我想13号线是指

userinf.getGender().equals("Male")

的userinf.getGender()回报null，所以你不能把它equals。该getGender回报null因为你传递一个对象，你没叫任何的制定者：

public void editUser(int row){ 
    UserInformation userInf=new UserInformation(); 
    userModel.getSelectedMember(row); 
    NewUserFrame_Edit edit = new NewUserFrame_Edit(userInf); 
}

来源

2013-02-25 18:28:13 Robin

我会尽快添加整个Class代码 – Sajad 2013-02-26 11:33:02

@ Sajjad-还指出哪一个是该类中的第13行 – Robin 2013-02-26 11:36:09

我更新我的代码看起来很清晰 – Sajad 2013-02-26 18:10:15

按行选择编辑jtable内容

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