Describe the role of interface and event handling with the help of observer pattern. You have to explain following a. Interfaces and how interfaces are different from abstract classes (difference with respect to purpose) b. Observer pattern with the help of java code.

Describe the role of interface and event handling with the help of observer pattern. You have to explain following a. Interfaces and how interfaces are different from abstract classes (difference with respect to purpose) b. Observer pattern with the help of java code.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Please Explain all steps .

NEED CODE . explain everything in code.

LANGUAGE: JAVA

Describe the role of interface and event handling with the help of observer pattern. You
have to explain following
a. Interfaces and how interfaces are different from abstract classes (difference with
respect to purpose)
b. Observer pattern with the help of java code.

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