Invalid "required" attribute

Question

I took a project and the same is showing compilation error because it is not recognizing the attribute "required" in the excerpt below:

@XmlElementRef(name = "Nome", namespace = "http://schemas.datacontract.org/teste/teste/teste", type = JAXBElement.class, required = false)

The error presented is:

The attribute required is Undefined for the Annotation type Xmlelementref

Answer 1

The problem is because you are using Java 6. required is only supported from Java 7, according to documentation. So to work, you’ll need to use at least Java 7.

Source: https://stackoverflow.com/questions/34791197/cannot-find-symbol-method-required-javax-xml-bind-annotation-xmlelementref