Can somebody explain the error when i try to delete something off my Jlist?

Question

type String name, password, phone and int currently salary and desired salary.
press the add button.
then click on the name and pres delete. theres a huge error on the command prompt. could some1 tell me how to solve it?
here are the codes:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.text.*;
import java.util.*;
import java.util.Vector;
import javax.swing.JScrollPane.*;
import javax.swing.event.ListSelectionListener;
public class Employment extends JFrame
        //declare class variables
        private JPanel jpApplicant, jpEverything,jpWEST, jpCENTRE, jpEAST, jpAddEditDelete,
                                   jpCentreTOP, jpCentreBOT, jpEastTOP, jpEastCENTRE, jpEastBOT,
                                   jpBlank1, panel1, panel2, panel3, panel4,jpBottomArea,
                                   jpEmptyPanelForDisplayPurposes;
        private JLabel jlblApplicantForm, jlblAppList, jlblName, jlblPhone,
                                   jlblCurrentSalary, jlblPassword, jlblDesiredSalary,
                                   jlblNotes, jlblApplicantSkills, jlblIndustrySkills,
                                   jlblBlank1, jlblBlank2, ApplicantListLabel,
                                   NotesListLabel, ApplicantSkillsLabel,
                                   IndustrySkillsLabel,jlblEmptyLabelForDisplayPurposes;  
        private JButton jbtnAdd1, jbtnEdit, jbtnDelete, jbtnSave, jbtnCancel,
                                        jbtnAdd2, jbtnRemove;
        private JTextField jtfName, jtfPhone, jtfCurrentSalary, jtfPassword,
                                           jtfDesiredSalary;
  private JTabbedPane tabbedPane;
        //private DefaultListModel listModel2;
  String name,password,phone,currentsalary,desiredsalary,textareastuff,allthetext;
  String selectedname;
        final JTextArea Noteslist= new JTextArea();
        DefaultListModel listModel = new DefaultListModel();
        JList ApplicantSkillsList = new JList(listModel);
        DefaultListModel listModel2=new DefaultListModel();
  JList ApplicantList = new JList(listModel2);
       private ListSelectionModel listSelectionModel;
        JList  IndustrySkillsList;
              Vector<StoringData> details = new Vector<StoringData>();             
            public static void main(String []args)
                Employment f = new Employment();
                f.setVisible(true);
                f.setDefaultCloseOperation(EXIT_ON_CLOSE);
                f.setResizable(false);
            }//end of main
                public Employment()
                        setSize(800,480);
                        setTitle("E-commerce Placement Agency");
      Font listfonts = new Font("TimesRoman", Font.BOLD, 12);
                        JPanel topPanel = new JPanel();
                        topPanel.setLayout( new BorderLayout() );
                        getContentPane().add( topPanel );
                        createPage1();
                        createPage2();
                        createPage3();
                        createPage4();
                        tabbedPane = new JTabbedPane();
                        tabbedPane.addTab( "Applicant", panel1 );
                        tabbedPane.addTab( "Job Order", panel2 );
                        tabbedPane.addTab( "Skill", panel3 );
                        tabbedPane.addTab( "Company", panel4 );
                        topPanel.add( tabbedPane, BorderLayout.CENTER );
        public void createPage1()//PAGE 1
         /*******************TOP PART********************/
                        panel1 = new JPanel();
                        panel1.setLayout( new BorderLayout());
      jpBottomArea = new JPanel();
      jpBottomArea.setLayout(new BorderLayout());
                        jpApplicant= new JPanel();
                        jpApplicant.setLayout(new BorderLayout());
                        Font bigFont = new Font("TimesRoman", Font.BOLD,24);
                        jpApplicant.setBackground(Color.lightGray);
                        jlblApplicantForm = new JLabel("\t\t\t\tAPPLICANT FORM  ");
                        jlblApplicantForm.setFont(bigFont);
                        jpApplicant.add(jlblApplicantForm,BorderLayout.EAST);
                        panel1.add(jpApplicant,BorderLayout.NORTH);
                        panel1.add(jpBottomArea,BorderLayout.CENTER);
       /********************************EMPTY PANEL FOR DISPLAY PURPOSES*************************/
           jpEmptyPanelForDisplayPurposes = new JPanel();
           jlblEmptyLabelForDisplayPurposes = new JLabel(" ");
           jpEmptyPanelForDisplayPurposes.add(jlblEmptyLabelForDisplayPurposes);
           jpBottomArea.add(jpEmptyPanelForDisplayPurposes,BorderLayout.NORTH);
       /*****************************************WEST*********************************/             
                        jpWEST = new JPanel();                 
                        jpWEST.setLayout( new BorderLayout());
                        //Applicant List
     // listModel2=new DefaultListModel();
     // ApplicantList = new JList(listModel2);
            listSelectionModel = ApplicantList.getSelectionModel();
            listSelectionModel.addListSelectionListener(new SharedListSelectionHandler());
            JScrollPane scrollPane3 = new JScrollPane(ApplicantList);
      ApplicantList.setPreferredSize(new Dimension(20,40));
         scrollPane3.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);        
                        scrollPane3.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
                        ApplicantListLabel = new JLabel( "Applicant List:");
                        jpWEST.add(ApplicantListLabel,"North"); 
                        jpWEST.add(scrollPane3,"Center");
                        jpBottomArea.add(jpWEST,BorderLayout.WEST);
                        /*********CENTRE*********/
                        jpCENTRE = new JPanel();
                        jpCENTRE.setLayout(new GridLayout(2,1));
                        jpCentreTOP = new JPanel();
                        jpBottomArea.add(jpCENTRE,BorderLayout.CENTER);
                        jpCENTRE.add(jpCentreTOP);
                        jpCentreTOP.setLayout(new GridLayout(6,2));
                      //Creating labels and textfields
                        jlblName = new JLabel( "Name:");
                        jlblBlank1 = new JLabel ("");
                        jtfName = new JTextField(18);
                        jlblBlank2 = new JLabel("");
                        jlblPhone = new JLabel("Phone:");
                        jlblCurrentSalary = new JLabel("Current Salary:");
                        jtfPhone = new JTextField(13);
                        jtfCurrentSalary = new JTextField(7);
                        jlblPassword = new JLabel("Password:");
                        jlblDesiredSalary = new JLabel("Desired Salary:");
                        jtfPassword = new JTextField(13);
                        jtfDesiredSalary = new JTextField(6);
                      //Add labels and textfields to panel
                        jpCentreTOP.add(jlblName);
                        jpCentreTOP.add(jlblBlank1);
                        jpCentreTOP.add(jtfName);
                        jpCentreTOP.add(jlblBlank2);
                        jpCentreTOP.add(jlblPhone);
                        jpCentreTOP.add(jlblCurrentSalary);
                        jpCentreTOP.add(jtfPhone);
                        jpCentreTOP.add(jtfCurrentSalary);
                        jpCentreTOP.add(jlblPassword);
                        jpCentreTOP.add(jlblDesiredSalary);
                        jpCentreTOP.add(jtfPassword);
                        jpCentreTOP.add(jtfDesiredSalary);
                        //Noteslist
                        jpCentreBOT = new JPanel();
                        jpCentreBOT.setLayout( new BorderLayout());
                        jpCENTRE.add(jpCentreBOT);
                        jpBlank1 = new JPanel();
     // Noteslist = new JTextArea(/*Document doc*/);
                        JScrollPane scroll3=new JScrollPane(Noteslist);
                        scroll3.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);        
                        scroll3.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
                        NotesListLabel = new JLabel( "Notes:");
                        jpCentreBOT.add(NotesListLabel,"North"); 
                        jpCentreBOT.add(scroll3,"Center");
                        jpCentreBOT.add(jpBlank1,"South");
                        jpBottomArea.add(jpCENTRE,BorderLayout.CENTER);
                        /**********EAST**********/
                        //Applicant Skills Panel
                        //EAST ==> TOP
                        jpEAST = new JPanel();
                        jpEAST.setLayout( new BorderLayout());
                        jpEastTOP = new JPanel();
                        jpEastTOP.setLayout( new BorderLayout());
                        ApplicantSkillsLabel = new JLabel( "Applicant Skills");
                        JScrollPane scrollPane1 = new JScrollPane(ApplicantSkillsList);
                       scrollPane1.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);        
                      scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);        
                        ApplicantSkillsList.setVisibleRowCount(6);
                        jpEastTOP.add(ApplicantSkillsLabel,"North"); 
                        jpEastTOP.add(scrollPane1,"Center");
                        jpEAST.add(jpEastTOP,BorderLayout.NORTH);
                        jpBottomArea.add(jpEAST,BorderLayout.EAST);
                        //Add & Remove Buttons
                        //EAST ==> CENTRE
                        jpEastCENTRE = new JPanel();
                        jpEAST.add(jpEastCENTRE,BorderLayout.CENTER);
                        jbtnAdd2 = new JButton("Add");
                        jbtnRemove = new JButton("Remove");
                        //add buttons to panel
                        jpEastCENTRE.add(jbtnAdd2);
                        jpEastCENTRE.add(jbtnRemove);
                        //add listener to button
                       jbtnAdd2.addActionListener(new Add2Listener());
                       jbtnRemove.addActionListener(new RemoveListener());
                        //Industry Skills Panel
                        //EAST ==> BOTTOM
                        jpEastBOT = new JPanel();
                        jpEastBOT.setLayout( new BorderLayout());
                       String[] data = {"Access97", "Basic Programming",
                       "C++ Programming", "COBOL Programming",
                       "DB Design", "Fortran programming"};
                       IndustrySkillsList = new JList(data);
                       JScrollPane scrollPane = new JScrollPane(IndustrySkillsList);
                       scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);        
                       scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
                       IndustrySkillsLabel = new JLabel( "Industry Skills:");
                       jpEastBOT.add(IndustrySkillsLabel,"North"); 
                       jpEastBOT.add(scrollPane,"Center");
                       jpEAST.add(jpEastBOT,BorderLayout.SOUTH);
                        //BOTTOM
                        jpAddEditDelete= new JPanel();
                        jbtnAdd1=       new JButton("Add");
                        jbtnEdit=       new JButton("Edit");
                        jbtnDelete=     new JButton("Delete");
                        jbtnSave=       new JButton("Save");
                        jbtnCancel=     new JButton("Clear");
                        jpAddEditDelete.add(jbtnAdd1);
                        jpAddEditDelete.add(jbtnEdit);
                        jpAddEditDelete.add(jbtnDelete);
                        jpAddEditDelete.add(jbtnSave);
                        jpAddEditDelete.add(jbtnCancel);
                       jbtnEdit.addActionListener(new EditListener());
                       jbtnDelete.addActionListener(new DeleteListener());
                        jbtnEdit.addActionListener(new EditListener());
                        jbtnAdd1.addActionListener(new Add1Listener());
                        jbtnCancel.addActionListener(new CancelListener());
                        jpBottomArea.add(jpAddEditDelete,BorderLayout.SOUTH);
        public void createPage2()//PAGE 2
                panel2 = new JPanel();
                panel2.setLayout( new GridLayout(1,1) );
                panel2.add( new JLabel( "Sorry,under construction" ) );
        public void createPage3()//PAGE 3
                panel3 = new JPanel();
                panel3.setLayout( new GridLayout( 1, 1 ) );
                panel3.add( new JLabel( "Sorry,under construction" ) );
        public void createPage4()//PAGE 4
                panel4 = new JPanel();
                panel4.setLayout( new GridLayout( 1, 1 ) );
                panel4.add( new JLabel( "Sorry,under construction" ) );
        public class Add1Listener implements ActionListener
        public void actionPerformed(ActionEvent e)
               // int AppListSize;
                int listSize;
                ApplicantSkillsList.getModel();
       listSize =listModel.getSize();
        String[] skills= new String[5];
        for(int a=0; a<listSize;a++)
        skills[a] =(String)ApplicantSkillsList.getModel().getElementAt(a);
        System.out.println(skills[a]);
                name = jtfName.getText();
                password = jtfPassword.getText();
                phone = jtfPhone.getText();
                currentsalary = jtfCurrentSalary.getText();
                int i= Integer.parseInt(currentsalary);
                desiredsalary = jtfDesiredSalary.getText();
                int j= Integer.parseInt(desiredsalary);
       allthetext = Noteslist.getText();
       StoringData person = new StoringData(name,password,phone,allthetext,skills,i,j);
                details.add(person);
             // details.add(AppSkillsList);
                   listModel2.addElement(name);
                jtfName.setText("");
                jtfPassword.setText("");
                jtfPhone.setText("");
                jtfCurrentSalary.setText("");
                jtfDesiredSalary.setText("");
                Noteslist.setText("");
                   listModel.clear();
        public class Add2Listener implements ActionListener
                public void actionPerformed(ActionEvent e)
                       String temp1;
                       temp1 = (String)IndustrySkillsList.getSelectedValue();
                       listModel.addElement(temp1);
        public class RemoveListener implements ActionListener
                public void actionPerformed(ActionEvent e)
                        int index = ApplicantSkillsList.getSelectedIndex();
                    listModel.remove(index);
        public class EditListener implements ActionListener
                public void actionPerformed(ActionEvent e)
            jtfName.setEditable(true);
            jtfPassword.setEditable(true);
            jtfPhone.setEditable(true);
            jtfCurrentSalary.setEditable(true);
            jtfDesiredSalary.setEditable(true);
            Noteslist.setEditable(true);
            jbtnAdd2.setEnabled(true);  
            jbtnRemove.setEnabled(true);
            jbtnSave.setEnabled(true);
            jbtnCancel.setEnabled(true);                     
        public class DeleteListener implements ActionListener
         public void actionPerformed(ActionEvent e)
     int index = ApplicantList.getSelectedIndex();
                   listModel2.remove(index);
        public class SaveListener implements ActionListener
                public void actionPerformed(ActionEvent e)
                     selectedname =ApplicantList.getSelectedValue().toString();
                        StoringData selectedPerson = null;     
                    name = jtfName.getText();
                     password = jtfPassword.getText();
                     phone = jtfPhone.getText();
                     currentsalary = jtfCurrentSalary.getText();
                     int i= Integer.parseInt(currentsalary);
                     desiredsalary = jtfDesiredSalary.getText();
                     int j= Integer.parseInt(desiredsalary);
                          allthetext = Noteslist.getText();
                    for (StoringData person : details)
                          if (person.getName1().equals(selectedname))
                            selectedPerson = person;
                         //     changedname = person.getName1()
                         //     changedphone =
                         //     changedallthetext =
                         //     //changedcurrentsalary                      
                           //     person.setName1(jtfName.getText());
                           //     person.setPassword1(jtfPassword.getText()) ;
                           ////     person.setPhone1(phone);
                           //     person.setAllTheText(allthetext) ;
                           //     person.setCurrentSalary1(i);
                           //     person.setDesiredSalary1(j);
                       jtfName.setEditable(false);
                   jtfPassword.setEditable(false);
                   jtfPhone.setEditable(false);
                   jtfCurrentSalary.setEditable(false);
                   jtfDesiredSalary.setEditable(false);                         
                   Noteslist.setEditable(false);
        public class CancelListener implements ActionListener
                public void actionPerformed(ActionEvent e)
                jtfName.setText("");
                jtfPassword.setText("");
                jtfPhone.setText("");
                jtfCurrentSalary.setText("");
                jtfDesiredSalary.setText("");
                Noteslist.setText("");
                listModel.clear();
                   jtfName.setEditable(true);
                   jtfPassword.setEditable(true);
                   jtfPhone.setEditable(true);
                   jtfCurrentSalary.setEditable(true);
                   jtfDesiredSalary.setEditable(true);                         
                   Noteslist.setEditable(true);
                    jbtnAdd2.setEnabled(true);  
                   jbtnRemove.setEnabled(true);
        public class SharedListSelectionHandler implements ListSelectionListener
        public void valueChanged(ListSelectionEvent e)
         if(e.getValueIsAdjusting() == false){
         selectedname =ApplicantList.getSelectedValue().toString();
         StoringData selectedPerson = null;
         jtfName.setEditable(false);
         jtfPassword.setEditable(false);
         jtfPhone.setEditable(false);
         jtfCurrentSalary.setEditable(false);
         jtfDesiredSalary.setEditable(false);                         
         Noteslist.setEditable(false);
         jbtnAdd2.setEnabled(false);  
         jbtnRemove.setEnabled(false);
         jbtnSave.setEnabled(false);
         jbtnCancel.setEnabled(true);
           jtfName.setText("");
           jtfPassword.setText("");
           jtfPhone.setText("");
           jtfCurrentSalary.setText("");
           jtfDesiredSalary.setText("");
   for (StoringData person : details)
      if (person.getName1().equals(selectedname))
                     selectedPerson = person;
                     jtfName.setText(person.getName1());
                     jtfPassword.setText(person.getPassword1());
                  jtfPhone.setText(person.getPhone1());
                  Noteslist.setText(person.getAllTheText1());
                 // String sal1 = Integer.parseString(currentsalary);
                // String sal2 = Integer.parseString(desiredsalary);
                 jtfCurrentSalary.setText(person.getCurrentSalary1()+"");
                 jtfDesiredSalary.setText(person.getdesiredsalary1()+"");
         String[] theskills = person.getSkills1();
         for(int a=0; a<theskills.length;a++)
                listModel.addElement(theskills[a]);
         break;
   // if (selectedPerson != null)
}

Answer 1

and :
//StoringData class
class StoringData{
private String name;
private String password;
private String phone;
private String allthetext;
private String[] theskills;
private int currentsalary;
private int desiredsalary;
public StoringData()
  name = null;
  password = null;
  phone = null;
  allthetext = null;
  theskills = null;
  currentsalary = 0;
  desiredsalary = 0;
public StoringData(String n,String pw, String p,String a,String[] t, int c, int d)
  name = n;
  password = pw;
  phone = p;
  currentsalary = c;
  desiredsalary = d;
  allthetext = a;
  theskills = t;
public String getName1()
  return name;
public String getPassword1()
  return password;
public String getPhone1()
  return phone;
public String getAllTheText1()
     return allthetext;
public int getCurrentSalary1()
  return currentsalary;
public int getdesiredsalary1()
  return desiredsalary;
public String[] getSkills1()
     return theskills;
public void setName1(String n)
  name = n;
public void setPassword1(String pw)
  password = pw;
public void setPhone1(String p)
  phone = p;
public void setCurrentSalary1(int c)
  currentsalary = c;
public void setDesiredSalary1(int d)
  desiredsalary = d;
public void setAllTheText(String a)
  allthetext = a;
}