驗證電話號碼保存

Question

之前，我這裏有一個代碼，以驗證電話號碼

public class ValidatePhoneNumber { 

    public static void main(String[] argv) { 

     String phoneNumber = "1-(80..2)-321-0361"; 
     System.out.println(phoneNumber.length()); 
     String regex = "^\\+?[0-9.()-]{10,25}$"; 
     Pattern pattern = Pattern.compile(regex); 
     Matcher matcher = pattern.matcher(phoneNumber); 

     if (matcher.matches()) { 
      System.out.println("Phone Number Valid"); 
     } else { 
      System.out.println("Phone Number must be in the form XXX-XXXXXXX"); 
     } 
    } 
} 

我怎樣才能把這個代碼SAVEBUTTON ACTION裏面？

private void saveButton3ActionPerformed(java.awt.event.ActionEvent evt) {...} 

，以防止用戶保存電話號碼格式無效

THANK YOU！

Answer 1

假如你是一類public class Inventory extends javax.swing.JFrame內編寫代碼（如您在您的評論指定），我會寫一個ActionListener到或者處理按鈕單擊事件

public class Inventory extends javax.swing.JFrame 
    private String currPhoneNumber; // it may contains something like "1-(80..2)-321-0361" 

    ... 

    // this code can be *within* your class, but *outside* any method declaration 
    class ButtonListener implements ActionListener { 
     public void actionPerformed(ActionEvent ae) { 
     System.out.println(currPhoneNumber.length()); 
     String regex = "^\\+?[0-9.()-]{10,25}$"; 
     Pattern pattern = Pattern.compile(regex); 
     Matcher matcher = pattern.matcher(currPhoneNumber); 
     } 

     if (matcher.matches()) { 
     System.out.println("Phone Number Valid"); 
     } else { 
     System.out.println("Phone Number must be in the form XXX-XXXXXXX"); 

     // throw an exception or do something that will prevent the data to be 
     // saved (what to do here really depends on the application you are writing) 
     } 

    } 

    ... 

    private void createMyFancyInterface(...) { 
     ... 
     JButton source = new JButton("Do something"); 
     source.addActionListener(new ButtonListener()); 
     ... 
    } 
} 

（有人下劃線），可以使用匿名類，因此將其降低到以下值：

public class Inventory extends javax.swing.JFrame 
    private String currPhoneNumber; // it may contains something like "1-(80..2)-321-0361" 

    ... 

    // this code can be *within* your class, but *outside* any method declaration 
    class ButtonListener implements ActionListener { 
     public void actionPerformed(ActionEvent ae) { 
     System.out.println(currPhoneNumber.length()); 
     String regex = "^\\+?[0-9.()-]{10,25}$"; 
     Pattern pattern = Pattern.compile(regex); 
     Matcher matcher = pattern.matcher(currPhoneNumber); 
     } 

     if (matcher.matches()) { 
     System.out.println("Phone Number Valid"); 
     } else { 
     System.out.println("Phone Number must be in the form XXX-XXXXXXX"); 

     // throw an exception or do something that will prevent the data to be 
     // saved (what to do here really depends on the application you are writing) 
     } 

    } 

    ... 

    private void createMyFancyInterface(...) { 
     ... 
     JButton source = new JButton("Do something"); 
     source.addActionListener(new ActionListener() { 
      public void actionPerformed(ActionEvent ae) { 
      // the same code as ButtonListener.actionPerformed above 
      ... 
      } 
     }); 
     ... 
    } 
} 

Answer 2

這是執行此操作的簡單方法。

class JavaApplication extends JFrame implements ActionListener { 

    JTextArea area; 
    JButton button; 
    JTextField box; 
    JPanel panel; 

    public JavaApplication19() { 
     panel = new JPanel(); 
     panel = (JPanel) getContentPane(); 
     panel.setLayout(new FlowLayout()); 
     area = new JTextArea(26, 30); 
     box = new JTextField(30); 
     button = new JButton("Submit"); 
     button.addActionListener(this); 
     panel.add(area); 
     panel.add(button); 
     panel.add(box); 
    } 

    @Override 
    public void actionPerformed(ActionEvent e) { 
     String phoneNumber = area.getText(); 
     System.out.println(phoneNumber); 
     String regex = "^\\+?[0-9.()-]{10,25}$"; 
     Pattern pattern = Pattern.compile(regex); 
     Matcher matcher = pattern.matcher(phoneNumber); 

     if (matcher.matches()) { 
      box.setText("Phone Number Valid"); 
     } else { 
      box.setText("Phone Number must be in the form XXX-XXXXXXX"); 
     } 
    } 

    public static void main(String[] args) { 
     JavaApplication pad = new JavaApplication(); 
     pad.setSize(500, 500); 
     pad.setVisible(true); 
    } 
}