Does reflection copy object contents?

I tried following code copyCustom() to copy an object and create a new object with original object content. Once I got new object copy. I modified some content (String content) using get/set methods, unforturnately the contents of original object also changed. In other words, new object copy referring to original object. I just need an object with deep copying without any references to original object

    @SuppressWarnings("unchecked")
private <T> T copyCustom(T entity) throws IllegalAccessException, InstantiationException {
    Class<?> clazz = entity.getClass();
    T newEntity = (T) entity.getClass().newInstance();

    while (clazz != null) {
        copyFields(entity, newEntity, clazz);
        clazz = clazz.getSuperclass();
    }

    return newEntity;
}

private <T> T copyFields(T entity, T newEntity, Class<?> clazz) throws IllegalAccessException {
    List<Field> fields = new ArrayList<Field>();
    for (Field field : clazz.getDeclaredFields()) {
        fields.add(field);
    }
    for (Field field : fields) {

        field.setAccessible(true);
        // next we change the modifier in the Field instance to
        // not be final anymore, thus tricking reflection into
        // letting us modify the static final field
        Field modifiersField;
        try {
            modifiersField = Field.class.getDeclaredField("modifiers");
             modifiersField.setAccessible(true);
                int modifiers = modifiersField.getInt(field);
                // blank out the final bit in the modifiers int
                modifiers &= ~Modifier.FINAL;
                modifiersField.setInt(field, modifiers);
                field.set(newEntity, field.get(entity));
        } catch (NoSuchFieldException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SecurityException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    return newEntity;
}