import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.OutputStreamWriter;
import java.io.Serializable;

import com.thoughtworks.xstream.XStream;
    
class Class2 implements Serializable
{
    int i = 3;
        
    private void writeObject(ObjectOutputStream out)  throws IOException
    {
        out.defaultWriteObject();
    }
}
    
public class Class1 implements Serializable 
{
    String name;
    
    // problem caused by transient Class2 with custom writeObject(); works
    // correctly if class2 non-transient or does not have custom writeObject()
    transient Class2 class2;
        
    public Class1()
    {
        name = "Class1";
        class2 = new Class2();
    }
    
    private void writeObject(ObjectOutputStream out) throws IOException
    {
        out.writeObject(class2);
        out.defaultWriteObject();
    }

    static public void main(String args[])
    {
        try {
            XStream xstream = new XStream();
            OutputStreamWriter writer = new OutputStreamWriter(System.out);
            ObjectOutputStream os = xstream.createObjectOutputStream(writer);
            os.writeObject(new Class1());
            os.close();

        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}