Question

Distinguish between constructor and method abstract class and interface​

Answer 1

Answer:

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Abstract class and interface both are used to achieve abstraction where we can declare the abstract methods. 3) Abstract class can have final, non-final, static and non-static variables. ... Interface has only static and final variables

Answer 2

Answer:

The difference between class and interface is:

Abstract class

• Abstract class does not support inheritance.
• An abstract class would contain constructor.
• An abstract class is declared using the "Abstract" keyword.
• It can be used with all access modifiers.

Abstract Interface

• The interface supports multiple inheritances.
• The interface does not contain a constructor.
• The interface is declared using the "interface" keyword.
• It can be used with only public access modifier.