Looking at the source code of the Flutter, I found out that no class extends the Object class explicitly. I know that, for Java, it is true that every class will be extending Object implicitly. Is it true for Dart also?

CodePudding user response：

Yes.

You can read more about it on flutter.dev

The base class for all Dart objects except null.

Because Object is a root of the non-nullable Dart class hierarchy, every other non-Null Dart class is a subclass of Object.

When you define a class, you should consider overriding toString to return a string describing an instance of that class. You might also need to define hashCode and operator ==, as described in the Implementing map keys section of the library tour.