Why am I getting java.lang.ClassCastException ?

[phpuser123]

Here are the codes I just compiled in java and I am getting a java.lang.ClassCastException ...

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Date;
 
public class test_serialisation implements Serializable{
 
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
 
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        FileOutputStream f;
        try {
            f = new FileOutputStream("tmp");
            ObjectOutput s = new ObjectOutputStream(f);
            s.writeObject("Today");
            s.writeObject(new Date());
            s.flush();
            FileInputStream in = new FileInputStream("tmp");
            ObjectInputStream ss = new ObjectInputStream(in);
 
            Object dt=(Object)ss.readObject();
            Date dtt=((Date) dt);
 
            System.out.println(dtt);
} catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
 
    }
 
}
 
 

and my printstack is

java.lang.ClassCastException: java.lang.String
    at test_serialisation.main(test_serialisation.java:33)
 

I cannot understand properly what it means since I am now learning java serialisation.. I awould appreciate any help..

[improvcornartist]

The full error is

java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Date
        at test_serialisation.main(test_serialisation.java:33)

and occurs on

Date dtt=((Date) dt);

It doesn't like that you are trying to convert a string to a date.