Example
public
class
ClassA
implements
Comparable {
// Comparable method implementations...
private class
ClassB
extends
ClassA
implements
Comparable {
// ...
}
}
Solution
Remove the
implements
Comparable from ClassB declaration
Example
public
class
ClassA
implements
Comparable {
// Comparable method implementations...
private class
ClassB
extends
ClassA {
// ...
}
}