Java doesn’t support multiple inheritance through class extension, however. When viewing an inheritance hierarchy, you can easily detect multiple inheritance by the presence of a diamond pattern.

Leider wird in der Java Hierarchy View in Eclipse (und wahrscheinlich auch in IntelliJ, weiss ich nicht genau, ich benutze Eclipse) keine Mehrfachvererbung mit Interfaces angezeigt. Unfortunately, in ...

How to add multiple values per key to a Java HashMap. It seems like an oversight for the standard Java API not to have a collection class that allows a key to have multiple values. If this is an ...