Java-Swing: Popup-Frame kann nicht von JTable aus geöffnet werden

Question

Mein aktuelles Projekt ist ein einfacher E-Mail-Client. Jetzt habe ich das Hauptfenster mit der Liste der Nachrichten aus dem Posteingang fertig. Der nächste Schritt ist das Öffnen eines neuen Fensters mit der Nachricht von Klick auf Jtable mit der Liste der Nachrichten. Aber Im diese Ausnahme erhalten, wenn auf Zeile in der Tabelle klicken:

22 
Test problem 
"Alb." <test@gmail.com> 
Hello 

My PC is not working 

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException:4 >= 4 
at java.util.Vector.elementAt(Vector.java:470) 
at javax.swing.table.DefaultTableColumnModel.getColumn(DefaultTableColumnModel.java:294) 
at sun.swing.SwingUtilities2.convertColumnIndexToModel(SwingUtilities2.java:1896) 
at javax.swing.JTable.convertColumnIndexToModel(JTable.java:2582) 
    at javax.swing.JTable.getValueAt(JTable.java:2717) 
    at CheckEmail$1.mouseClicked(CheckEmail.java:129) 
    at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270) 
    at java.awt.Component.processMouseEvent(Component.java:6519) 
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3312) 
    at java.awt.Component.processEvent(Component.java:6281) 
    at java.awt.Container.processEvent(Container.java:2229) 
    at java.awt.Component.dispatchEventImpl(Component.java:4872) 
    at java.awt.Container.dispatchEventImpl(Container.java:2287) 
    at java.awt.Component.dispatchEvent(Component.java:4698) 
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832) 
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4501) 
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422) 
    at java.awt.Container.dispatchEventImpl(Container.java:2273) 
    at java.awt.Window.dispatchEventImpl(Window.java:2719) 
    at java.awt.Component.dispatchEvent(Component.java:4698) 
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747) 
    at java.awt.EventQueue.access$300(EventQueue.java:103) 
    at java.awt.EventQueue$3.run(EventQueue.java:706) 
    at java.awt.EventQueue$3.run(EventQueue.java:704) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:77) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87) 
    at java.awt.EventQueue$4.run(EventQueue.java:720) 
    at java.awt.EventQueue$4.run(EventQueue.java:718) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:77) 
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:717) 
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) 
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) 
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) 
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91) 

hier ist mein Code:

import java.awt.BorderLayout; 
import org.apache.commons.codec.binary.Base64; 
import java.awt.Dimension; 
import java.util.*; 
import javax.mail.*; 
import javax.swing.*; 
import javax.swing.table.*; 
import org.apache.commons.codec.binary.Base64; 
import java.awt.*; 
import java.awt.event.*; 

public class CheckEmail { 

    static Object[][] mess = new Object[][]{}; 
    JTextField textMessage = null; 
    String text = null; 
    static Object messi = null; 

    public static void check(String host, String storeType, String user, 
     String password) 
    { 
     try { 

     Properties properties = new Properties(); 

     properties.put("mail.pop3.host", host); 
     properties.put("mail.pop3.port", "995"); 
     properties.put("mail.pop3.starttls.enable", "true"); 
     Session emailSession = Session.getDefaultInstance(properties); 

     Store store = emailSession.getStore("pop3s"); 

     store.connect(host, user, password); 

     Folder emailFolder = store.getFolder("INBOX"); 
     emailFolder.open(Folder.READ_ONLY); 

     Message[] messages = emailFolder.getMessages(); 
     JFrame frame = new JFrame("Main"); 
     JPanel panel = new JPanel(); 
     final String data[][] = null; 
     String [] col = {"num","Subject","From", "Text"}; 
    DefaultTableModel model = new DefaultTableModel(data, col); 

     final JTable table = new JTable(model); 
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
     table.getColumnModel().getColumn(0).setPreferredWidth(30); 
    table.getColumnModel().getColumn(1).setPreferredWidth(400); 
    table.getColumnModel().getColumn(2).setPreferredWidth(400); 
    table.getColumnModel().getColumn(3).setPreferredWidth(1); 
    table.setSize(830, 600); 

     for (int i = 0, n = messages.length; i < n; i++) { 
      Message message = messages[i]; 

     int num = i + 1; 
     String subject = message.getSubject(); 
     String from = message.getFrom()[0].toString(); 
     String text = message.getContent().toString(); 

     Object[] mess = new Object[]{num, subject, from, text}; 

     model.insertRow(i, mess); 
     } 

     panel.add(table); 

    JScrollPane scrollPane = new JScrollPane(table); 
     frame.add(scrollPane, BorderLayout.CENTER); 
     frame.setSize(830, 600); 
     frame.setVisible(true); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     emailFolder.close(false); 
     store.close(); 

     table.addMouseListener(new MouseAdapter() { 
     @Override 
     public void mouseClicked(final MouseEvent e) { 
      if (e.getClickCount() == 1) { 

       final JTable target = (JTable)e.getSource(); 
       int row = target.getSelectedRow(); 
       int column = target.getSelectedRow(); 

       for(int i = 0; i < column; i++) { 
       Object mess = (Object)target.getValueAt(row, i); 
       System.out.println(target.getValueAt(row, i)); 
       } 

       StringBuffer sb = new StringBuffer(); 

        sb.append(mess); 
        TextFrame textFrame = new TextFrame(sb.toString()); 
        textFrame.setVisible(true); 
      } 
     } 
    }); 

     } catch (NoSuchProviderException e) { 
     e.printStackTrace(); 
     } catch (MessagingException e) { 
     e.printStackTrace(); 
     } catch (Exception e) { 
     e.printStackTrace(); 
     } 
    } 
    public static void main(String[] args) { 

     String host = "pop3.gmail.com";// change accordingly 
     String mailStoreType = "pop3"; 
     String username = "test@gmail.com";// change accordingly 
     String password = "pass";// change accordingly 
     check(host, mailStoreType, username, password); 
} 
} 

und die zweite Klasse:

import java.awt.event.WindowAdapter; 
import java.awt.event.WindowEvent; 
import javax.swing.JFrame; 
import javax.swing.JTextArea; 

class TextFrame extends JFrame 
{ 
    public TextFrame(String content) { 
     super("TextFrame"); 

     JTextArea ta = new JTextArea(); 
     ta.setText(content); 
     getContentPane().add(ta); 
     addWindowListener(new WindowAdapter() { 
     public void windowClosing(WindowEvent we) { 
      dispose(); 
     } 
     }); 

     setSize(600, 400); 
    } 
} 

Answer 1

Sie ein Problem sehen Sie? :

int column = target.getSelectedRow(); 

Um genau zu sein, verwenden Sie getSelectedRow(), wenn Sie getSelectedColumn() verwenden wollten. zB sollte es sein:

int column = target.getSelectedColumn(); 

Der Schlüssel zu dieser Übung ist es, nicht den Stacktrace zu ignorieren, aber kritisch an der Linie zu suchen, die es Ihnen, hier zu suchen sagt: at CheckEmail$1.mouseClicked(CheckEmail.java:129)