inheritance - “every class in java extends the MetaClass Object” does it imply that every subclass causes a Diamond issue

Question

These two facts in java

Fact 1

“Every class in java by default extends the java meta class Object”

and

Fact 2

“Multiple inheritance is not allowed in java” read more about diamond proble here Java inheritance

are quiet confusing

Suppose ClassB extends ClassA then according to fact1 ClassB extends Object

Does that mean ClassB is extending both ClassA and Object? Is it a case of multiple inheritance?

If it’s not multiple inheritance then how aren't the two statements contradictory?

Answer 1

“Every class in java by default extends the java meta class Object” //fact1

Every Class extends Object class, only if they don't extend any other class directly.

If a class Test extends another Sample class, then Test don't extends Object class directly, but, inheriting the Object class behaviors through super class Sample, which directly extends Object class.