A Serialization Question

Experts,

I have a class named Address which has NOT implemented the Serializable interface. Then I have another class Employee which has implemented the Serializable interface. This Employee class HAS-A Address object embedded as a data member. I do the serialization. I can see the file employee1.dat is created but no data. Why the serialization is not happenning?. Here is the sample program.

prain.


import java.io.*;

class Address
{
     private String address;

     public Address(){}

     public Address( String a )
     {
          setAddress( a );
     }

     public void setAddress( String a )
     {
          address = a ;
     }

     public String getAddress()
     {
          return address;
     }

     public String toString()
     {
          return address;
     }
}

class Employee implements Serializable
{
     String name;
     Address addr;

     public Employee( String a, String b )
     {
          name = a;
          addr = new Address( b );
     }

     public String toString()
     {
          return "Employee: " + name + addr.toString();
     }

     private void writeObject( ObjectOutputStream objout ) throws IOException
     {
          try
          {
               objout.writeObject( addr.getAddress() );
               objout.defaultWriteObject();
          }

          catch( Throwable ex ){}
     }

     private void readObject( ObjectInputStream objin ) throws IOException
     {
          try
          {
               addr.setAddress( (String)objin.readObject() );
               objin.defaultReadObject();
          }

          catch( Throwable ex ){}
     }

     public static void main( String[] args )
     {
          Employee emp = new Employee( "Jack", "Bay Area" );

          try
          {
               ObjectOutputStream out = new ObjectOutputStream( new
BufferedOutputStream( new FileOutputStream( "employee.dat" )));
               out.writeObject( emp );

               out.close();

          }

          catch( Exception e ){}

          try
          {
               ObjectInputStream in = new ObjectInputStream( new
BufferedInputStream( new FileInputStream( "employee.dat" )));

               Employee emp1 = (Employee)in.readObject();
               System.out.println( emp1 );

          }

          catch( Exception e ){}

     }
}