package org.eclipse.persistence.testing.jaxb.xmlelementref.nills; import javax.xml.bind.annotation.XmlAttribute; import javax.xml.bind.annotation.XmlRootElement; import org.eclipse.persistence.testing.jaxb.xmlelementref.nills.Employee.Task; public class Address { @XmlAttribute String city; @Override public boolean equals(Object obj) { if (!(obj instanceof Address)) { return false; } Address a = (Address) obj; return a.city.equals(this.city); } }