您可能应该更喜欢继承（和委托）而不是继承：
public interface TaggedInterface { void foo();}public interface XMLElementInterface { void bar();}public class Tagged implements TaggedInterface { // ...}public class XMLElement implements XMLElementInterface { // ...}public class TaggedXmlElement implements TaggedInterface, XMLElementInterface { private TaggedInterface tagged; private XMLElementInterface xmlElement; public TaggedXmlElement(TaggedInterface tagged, XMLElementInterface xmlElement) { this.tagged = tagged; this.xmlElement = xmlElement; } public void foo() { this.tagged.foo(); } public void bar() { this.xmlElement.bar(); } public static void main(String[] args) { TaggedXmlElement t = new TaggedXmlElement(new Tagged(), new XMLElement()); t.foo(); t.bar(); }}
