hvorfor kan det ikke kører i Forte?

package DiveLog;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DiveLog2 {
   
    private JTabbedPane tabbedPane;
    private JFrame dlframe;

    /** Creates new DiveLog2 */
    public DiveLog2() {
        dlframe = new JFrame("A Java(TM) Tecnology Dive Log");
       
        dlframe.addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
              System.exit(0);
            }
        });
        tabbedPane = new JTabbedPane(SwingConstants.LEFT);
        tabbedPane.setBackground(java.awt.Color.blue);
        tabbedPane.setForeground(java.awt.Color.white);
        populateTabbedPane();
          buildMenu();
          dlframe.getContentPane().add(tabbedPane);
          dlframe.pack();
          dlframe.setSize(765,690);
          dlframe.setBackground(Color.white);
          dlframe.setVisible(true);
    }
   
    private void populateTabbedPane(){
       
    tabbedPane.addTab("Welcome",null,new Welcome(),"Welcome to the Dive Log");
    tabbedPane.addTab("Diver Data",null,new Diver(),"Click here to enter diver data");
    tabbedPane.addTab("Log Dives",null,new Dives(),"Click here to enter dives");
    tabbedPane.addTab("Statistics",null,new Statistics(),"Click here to calculate dive Statistics");
    tabbedPane.addTab("Favorite Web Site",null,new Website(),"Click here to see a web site");
    tabbedPane.addTab("Resources",
    null,
    new Resources (),
    "Click here to see a list of Resources ");
    }
   
    private void buildMenu(){
        JMenuBar mb = new JMenuBar();
        JMenu menu = new JMenu("File");
        JMenuItem item = new JMenuItem("Exit");
       
        item.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                System.exit(0);
            }
           
            });
      menu.add(item);   
        mb.add(menu);
      dlframe.setJMenuBar(mb);
   
    }   
public static void main(String[] args) {
    DiveLog dl = new DiveLog();
   
       
}
}
her er fejlene:

DiveLog/DiveLog2.java [44:1] cannot resolve symbol
symbol  : method addTab  (java.lang.String,<null>,DiveLog.Welcome,java.lang.String)
location: class javax.swing.JTabbedPane
    tabbedPane.addTab("Welcome",null,new Welcome(),"Welcome to the Dive Log");
              ^
DiveLog/DiveLog2.java [45:1] cannot resolve symbol
symbol  : method addTab  (java.lang.String,<null>,DiveLog.Diver,java.lang.String)
location: class javax.swing.JTabbedPane
    tabbedPane.addTab("Diver Data",null,new Diver(),"Click here to enter diver data");
              ^
DiveLog/DiveLog2.java [46:1] cannot resolve symbol
symbol  : method addTab  (java.lang.String,<null>,DiveLog.Dives,java.lang.String)
location: class javax.swing.JTabbedPane
    tabbedPane.addTab("Log Dives",null,new Dives(),"Click here to enter dives");
              ^
DiveLog/DiveLog2.java [47:1] cannot resolve symbol
symbol  : method addTab  (java.lang.String,<null>,DiveLog.Statistics,java.lang.String)
location: class javax.swing.JTabbedPane
    tabbedPane.addTab("Statistics",null,new Statistics(),"Click here to calculate dive Statistics");
              ^
DiveLog/DiveLog2.java [48:1] cannot resolve symbol
symbol  : method addTab  (java.lang.String,<null>,DiveLog.Website,java.lang.String)
location: class javax.swing.JTabbedPane
    tabbedPane.addTab("Favorite Web Site",null,new Website(),"Click here to see a web site");
              ^
DiveLog/DiveLog2.java [49:1] cannot resolve symbol
symbol  : method addTab  (java.lang.String,<null>,DiveLog.Resources,java.lang.String)
location: class javax.swing.JTabbedPane
    tabbedPane.addTab("Resources",
              ^
DiveLog/DiveLog.java [83:1] <identifier> expected
      menu.add(item);   
              ^
DiveLog/DiveLog.java [84:1] <identifier> expected
      mb.add(menu);
            ^
DiveLog/DiveLog.java [85:1] <identifier> expected
      jInternalFrame1.setJMenuBar(mb);
                                  ^
DiveLog/DiveLog.java [91:1] illegal start of expression
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
    ^
DiveLog/DiveLog.java [105:1] illegal start of expression
    private javax.swing.JTabbedPane jTabbedPane1;
    ^
DiveLog/DiveLog.java [40:1] cannot resolve symbol
symbol  : variable jInternalFrame1 
location: class DiveLog.DiveLog
        jInternalFrame1 = new javax.swing.JInternalFrame();
        ^
DiveLog/DiveLog.java [41:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
        jTabbedPane1 = new javax.swing.JTabbedPane();
        ^
DiveLog/DiveLog.java [45:1] cannot resolve symbol
symbol: method exitForm  (java.awt.event.WindowEvent)
                exitForm(evt);
                ^
DiveLog/DiveLog.java [49:1] cannot resolve symbol
symbol  : variable jInternalFrame1 
location: class DiveLog.DiveLog
        jInternalFrame1.setBackground(java.awt.Color.white);
        ^
DiveLog/DiveLog.java [50:1] cannot resolve symbol
symbol  : variable jInternalFrame1 
location: class DiveLog.DiveLog
        jInternalFrame1.setVisible(true);
        ^
DiveLog/DiveLog.java [52:1] cannot resolve symbol
symbol  : variable jInternalFrame1 
location: class DiveLog.DiveLog
            jInternalFrame1.setSelected(false);
            ^
DiveLog/DiveLog.java [56:1] cannot resolve symbol
symbol  : variable jInternalFrame1 
location: class DiveLog.DiveLog
        add(jInternalFrame1, java.awt.BorderLayout.EAST);
            ^
DiveLog/DiveLog.java [58:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
        jTabbedPane1.setToolTipText("");
        ^
DiveLog/DiveLog.java [59:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
        add(jTabbedPane1, java.awt.BorderLayout.WEST);
            ^
DiveLog/DiveLog.java [65:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
    jTabbedPane1.addTab("Welcome",null,new Welcome(),"Welcome to the Dive Log");
    ^
DiveLog/DiveLog.java [66:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
    jTabbedPane1.addTab("Diver Data",null,new Diver(),"Click here to enter diver data");
    ^
DiveLog/DiveLog.java [67:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
    jTabbedPane1.addTab("Log Dives",null,new Dives(),"Click here to enter dives");
    ^
DiveLog/DiveLog.java [68:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
    jTabbedPane1.addTab("Statistics",null,new Statistics(),"Click here to calculate dive Statistics");
    ^
DiveLog/DiveLog.java [69:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
    jTabbedPane1.addTab("Favorite Web Site",null,new Website(),"Click here to see a web site");
    ^
DiveLog/DiveLog.java [70:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
    jTabbedPane1.addTab("Resources",null,new Resources (),"Click here to see a list of Resources ");
    ^
DiveLog/DiveLog.java [83:1] cannot resolve symbol
symbol  : class add 
location: package menu
      menu.add(item);   
          ^
DiveLog/DiveLog.java [84:1] cannot resolve symbol
symbol  : class add 
location: package mb
      mb.add(menu);
        ^
DiveLog/DiveLog.java [85:1] cannot resolve symbol
symbol  : class setJMenuBar 
location: package jInternalFrame1
      jInternalFrame1.setJMenuBar(mb);
                      ^
DiveLog/DiveLog.java [77:1] cannot resolve symbol
symbol  : method actionListener  (<anonymous java.awt.event.ActionListener>)
location: class javax.swing.JMenuItem
        item.actionListener(new ActionListener()
            ^
DiveLog/DiveLog.java [107:1] cannot resolve symbol
symbol  : variable jTabbedPane1 
location: class DiveLog.DiveLog
    jInternalFrame1.getContentPane().add(jTabbedPane1);
                                        ^
DiveLog/DiveLog.java [107:1] cannot resolve symbol
symbol  : variable jInternalFrame1 
location: class DiveLog.DiveLog
    jInternalFrame1.getContentPane().add(jTabbedPane1);
    ^
32 errors
Errors compiling DiveLog2.

den metode addTab findes i forte , men jeg for fejl selvom jeg har gjort hvad kunne