在Java中，要使用“super”关键字，我是否必须导入目标类？

Question

When, in a constructor, we use the super keyword, do we have to import the class the super refers to (when super doesn't refer to Object)?

class A extends ... {
    A() {
        super(); // do we need to import the class super refers to?
    }
}

Answer 1

Yes, because it is in the extends clause.

The super() itself requires no imports, but for it to make sense you need a superclass. You don't need to import it, of course, if it is from java.lang

Answer 2

You do need to import the super class if it is not in the same package or it is in java.lang. If the base class is not available, super() doesn't work anyway.