Is this write way to clone a object?

Question

All,
I this the correct way to clone a object? if not so can anyone point me the right way to do that. Because this method is taking longer time to execute.
import java.io.*;
public class ObjectCloner
    public ObjectCloner()
    public static Object clone(Object obj)
        throws Exception
        ByteArrayOutputStream bstream = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(bstream);
        out.writeObject(obj);
        out.close();
        ByteArrayInputStream binstream = new ByteArrayInputStream(bstream.toByteArray());
        ObjectInputStream oin = new ObjectInputStream(binstream);
        Object newobj = oin.readObject();
        return newobj;
    public static int sizeOf(Object obj)
        try
            ByteArrayOutputStream bstream = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(bstream);
            out.writeObject(obj);
            out.close();
            return bstream.toByteArray().length;
        catch(Exception ex)
            ex.printStackTrace();
        return 0;
}

Answer 1

calvino_ind wrote:
i might be wrong, but i think there are some really easier ways to clone an object:
public class Age {
int numberOfYears;
public Age(int numberOfYears) {
this.numberOfYears = numebrOfYears;
public Object clone() {
return new Age(this.numberOfYears);
No! This is very wrong. For this simple example, all one needs is class Age to implement Cloneable and
public Object clone() {
         return super.clone();
}which will automatically give you a shallow clone of the the class.
Consider what ill happen with your approach when one clones superclasses of class Age.
Edited by: sabre150 on May 26, 2008 3:42 PM