Java Demo: serialize object to byte array

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

class SerialDemo implements Serializable {
    private final static long serialVersionUID = 1L;
    private String m_name;
    private int m_id;

    public SerialDemo(String name, int id)
    {
        m_name = name;
        m_id = id;
    }
    @Override
    public String toString() {
        return "SerialDemo<" + m_id + ", " + m_name + ">";
    }
    @Override
    public boolean equals(Object other) {
        if (other == null || other.getClass() != this.getClass())
            return false;
        SerialDemo theOther = (SerialDemo) other;
        if (this == theOther)
            return true;

        return m_id == theOther.m_id && m_name.equals(theOther.m_name);
    }

    @Override
    public int hashCode() {
        return (m_id * 0x108421) ^ m_name.hashCode();
    }
}

public class MyClass {
    public static void main(String[] args)
            throws IOException, ClassNotFoundException {

        // Starting object value
        SerialDemo original = new SerialDemo("Fred", 1234);

        // Serialize the object to a byte array
        ByteArrayOutputStream outdata = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(outdata);
        out.writeObject(original);

        // Capture the "file" data in a byte[] array
        byte[] serialized = outdata.toByteArray();

        // Read back the object from the serialized bytes:
        ByteArrayInputStream indata = new ByteArrayInputStream(serialized);
        ObjectInputStream in = new ObjectInputStream(indata);
        SerialDemo readback = (SerialDemo) in.readObject();

        // Display the results:
        System.out.println("original = " + original);
        System.out.println("readback = " + readback);
        System.out.println("original == readback: " + (original == readback));
        System.out.println("original.equals(readback): " +
                original.equals(readback));

        // The readback object should be a different object, so that
        // (original==readback) is false, but contains the same data,
        // so that original.equals(readback) is true.
    }
}