Need help with saving data

Question

I recently started studying in IT at college, and I think I have the basics in Java programming, however we haven't
been taught how to save data in our apps, so everytime i close my app, I lose all changes.
I went through Sun's IO tutorial, as well as a few tutorials online and I made a small application to practice saving my
Objects, however I can't seem to get it to work. I was hoping someone could look at my code and tell me what seems
to be my problem.
There are 3 classes in my project. The Base class makes a List that holds objects of type Person. the UIPerson class
has 3 buttons (Add, Save, Load) and a JList. When clicking on Add, it adds a new Person in the base and is shown in
the JList. The saving and loading is what I have trouble with.
UIPerson :
public class UIPerson extends JFrame implements Serializable{
     private JFrame jFrame = null; 
     private JPanel jContentPane = null;
     private JButton jbAdd = null;
     private JButton jbSave = null;
     private JButton jbLoad = null;
     private JList list = null;
     private Base base = null;
     public static void main(String args[]){
          UIPerson personList = new UIPerson();
     public UIPerson(){
               base = new Base();
               Container pane = getContentPane();
               setSize(288, 309);
               setVisible(true);
               jContentPane = new JPanel();
               jContentPane.setLayout(null);
               jbAdd = new JButton();
               jbAdd.setBounds(new Rectangle(24, 59, 58, 24));
               jbAdd.setText("Add");
               jbAdd.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         String Name, famName;
                         Name = JOptionPane.showInputDialog("Enter Name", null);
                         famName = JOptionPane.showInputDialog("Enter Family Name", null);
                         base.addPerson(new Person(Name, famName));
                         list.setListData(base.listPerson());
               jbSave = new JButton();
               jbSave.setBounds(new Rectangle(19, 106, 69, 34));
               jbSave.setText("Save");
               jbSave.addActionListener(new java.awt.event.ActionListener(){
                    public void actionPerformed(java.awt.event.ActionEvent e){
                         try{
                              FileOutputStream fos = new FileOutputStream("temp.dat");
                              ObjectOutputStream oos = new ObjectOutputStream(fos);
                              oos.writeObject(base);
                         catch(Exception ex){
                              System.out.println("Save Failed");
               jbLoad = new JButton();
               jbLoad.setBounds(new Rectangle(23, 154, 70, 29));
               jbLoad.setText("Load");
               jbLoad.addActionListener(new java.awt.event.ActionListener(){
                    public void actionPerformed(java.awt.event.ActionEvent e){
                         try{
                              FileInputStream fis = new FileInputStream("temp.dat");
                              ObjectInputStream ois = new ObjectInputStream(fis);
                              base = (Base)ois.readObject();
                              list.setListData(base.listPerson());
                         catch(Exception exc){
                              System.out.println("Load Failed");
               list = new JList();
               list.setBounds(new Rectangle(133, 47, 139, 151));
               jContentPane.add(jbAdd);
               jContentPane.add(jbSave);
               jContentPane.add(jbLoad);
               jContentPane.add(list);
               pane.add(jContentPane);
}Base :
public class Base implements Serializable{
     private ArrayList<Person> list;
     public Base(){
          list = new ArrayList<Person>();
          list.clear();
     public void addPerson(Person person){
          list.add(person);
     public void deletePerson(Person person){
          list.remove(person);
     public Person[] listPerson(){
          Person tab[] = new Person[list.size()];
          list.toArray(tab);
          return tab;
     public Person getPerson(Person person){
          ListIterator<Person> iterator = list.listIterator();
          Person current = null;
          while (iterator.hasNext()){
               current = iterator.next();
               if (current.equals(person))
                    return current;
          return null;
}Person :
public class Person {
     private String name, familyName;
     public Person(String name, String familyName){
          this.name = name;
          this.familyName = familyName;
     public String getName(){
          return name;
     public String getFamilyName(){
          return familyName;
     public String toString(){
          return name + " " + familyName;
}I'd appreciate any help that could be given.

Answer 1

My probelm is with my save/load funtions only, sorry for the extra code. Everytime i press on save or load, they
throw an IOException. Heres the code I specifically wanted viewed to know if there are any mistakes in it.
Save Button :
jbSave.addActionListener(new java.awt.event.ActionListener(){
          public void actionPerformed(java.awt.event.ActionEvent e){
               try{
                    FileOutputStream fos = new FileOutputStream("temp.dat");
                    ObjectOutputStream oos = new ObjectOutputStream(fos);
                    oos.writeObject(base);
               catch(FileNotFoundException ex){
                    System.out.println("(Save)File Not Found Exception");
               catch(IOException ex){
                    System.out.println("(Save)IOException");
     });Load Button :
jbLoad.addActionListener(new java.awt.event.ActionListener(){
          public void actionPerformed(java.awt.event.ActionEvent e){
               try{
                    FileInputStream fis = new FileInputStream("temp.dat");
                    ObjectInputStream ois = new ObjectInputStream(fis);
                    base = (Base)ois.readObject();
                    list.setListData(base.listPerson());
               catch(FileNotFoundException exc){
                    System.out.println("(Load) File not found exception");
               catch(IOException exc){
                    System.out.println("(Load) IO Exception");
               catch(ClassNotFoundException exc){
                    System.out.println("(Load) Class not found exception");
     });