not serializable error after implemaenting inteface on a particula class

[raghu ramn]

class BaseFile{

static ArrayList<Person> store=null;

public static void load(){
FileOutputStream in=new FileOutputStream("test.txt");
ObjectOutputStream out=new ObjectOutputStream(in);
out.WriteObject(store);
out.close();
}


public class Dairy extends BaseFile {

public Dairy(){
if(store==null){
store=new ArrayList<Person>();
}
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                      public static void main(String args[]) {
		String name = null;
		String dob = null;eader(new InputStreamReader(System.in));
                                                              System.out.println("enter name");
				name = br.readLine();
				System.out.println("enter dob");
				System.out.println("enter dob in dd-mm-yyyy formate only");
				dob = br.readLine();
                                                              Person p=new Person(name,dob);
                                                               store.add(p);
                                                            BaseFile.load();
}



class Person implements serializable{
String name;
String don;
public Person(String name, String dob){
this.name=name;
this.dob=dob;
}
}


}

it display the following error why
java.io.NotSerializableException: java.io.BufferedReader
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.util.ArrayList.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)

[Vijitha Kumara]

Welcome to JavaRanch, raghu ramn
Please UseCodeTags when posting code in the forums. You may edit and add code tags to your post. And is your Dairy class compiles in the first place (just by looking at it there's no store reference defined)?

[Campbell Ritchie]

None of your classes implements the Serializable interface.
Sorry, I was mistaken there.

[Rob Spoor]

Please PostRealCode. There is at least one } missing there, and there's a definite copy-paste error in there.