It can be used to define final class, final method, final fields and final variable. It can be used in many context in java. Final keyword perform a important role in java programming.
Abstraction shows only important things to the user and hides the internal details for example sending WhatSapp message, you just type the text and ping the message. You don't know the internal processing about the message delivery.
The java.io package contains all the classes required for input and output operations. Java uses the concept of stream to make I/O operation fast.Stre
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