Copy object field by field

CopyObjectFieldByField.java

public static void copyFieldByField(Object src, Object dest) {
    copyFields(src, dest, src.getClass());
}

private static void copyFields(Object src, Object dest, Class<?> klass) {
    Field[] fields = klass.getDeclaredFields();
    for (Field f : fields) {
        f.setAccessible(true);
        copyFieldValue(src, dest, f);
    }

    klass = klass.getSuperclass();
    if (klass != null) {
        copyFields(src, dest, klass);
    }
}

private static void copyFieldValue(Object src, Object dest, Field f) {
    try {
        Object value = f.get(src);
        f.set(dest, value);
    } catch (ReflectiveOperationException e) {
        throw new RuntimeException(e);
    }
}