SerializationTest.java

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

import junit.framework.TestCase;

public class SerializationTest extends TestCase
{

    public void test() throws Exception
    {
        deserialize(serialize(new Foo("serializable data")));
    }

    public byte[] serialize(Object instance) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream os = new ObjectOutputStream(baos);
        os.writeObject(instance);
        os.flush();
        return baos.toByteArray();
    }

    public Object deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        ObjectInputStream is = new ObjectInputStream(bais);
        return is.readObject();
    }

    public static class Foo implements Serializable
    {
        private final Object object;

        public Foo(Object object)
        {
            this.object = object;
        }
    }
}