Implementing Class Adapter Pattern in Java

Question

While reading up on the Class Adapter pattern in Head First Design Patterns, I came across this sentence:

class adapter... because you need multiple i

Answer 1

The full story in heads up is: class adapter pattern is impossible in Java just because Java does not provide multiple inheritance.

In their diagram, they show that the Adapter class subclasses both Target and Adaptee. Your example is (close to) the Object adapter pattern. The difference is that you implement the Target in your adapter class, rather then just subclassing the target (MyNeededInterface in your example)