Tech Talk With Debabrata

When we learning any programming languages like C, C++, Python, PHP etc, then the " Number Swap Programming " comes first for learning.  In this article I write the number swapping between two numbers in JAVA with 3 different algorithms .  1. Creating an auxiliary memory cell in the memory ; i.e use a temporary or 3rd variable. 2. Without creating any auxiliary(additional) memory cell ; i.e without use of any 3rd variable. 3. Using exclusive OR (Bit-wise XOR) operator. Problem Statement: Write a program in java to swap two numbers. Approach- 1 :  Creating an auxiliary memory cell in the memory ; i.e use a temporary or 3rd variable. In this approach we take a extra variable that temporarily holds the value of one variable. public class Test { public static void main (String[] args) { swapUsingTempVar( 5 , 6 ); } static void swapUsingTempVar ( int a, int b) { int temp; System. out . p...

 In this article, We try to understand the concept of Java Classes and Objects with an example. The key content of this article are- (i) What is class and Object (ii) Example of class and object (iii) Difference between Class and Object (i.a) Class In Java: A class is an entity that determines how an object will behave and what the object will contain. In other words, it is a blueprint or a set of instruction to build a specific type of object. It provides initial values for member variables and member functions or methods. (i.b) Object In Java: An object is nothing but a self-contained component that consists of methods and properties to make a data useful. It helps you to determines the behaviour of the class. i.e we say that " A class is a template for an object, and an object is an instance of a class ". That's why class is called as logical entity , where object is physical entity .  So simply, a class does not allocate memory space when it is created, on other han...

 The search functionality in android App is a very important feature of any list page. In this article I make a simple android application to describe the SearchView integration in Android with RecyclerView | Toolbar | Kotlin. Follow the steps- Step 1 :  First create a blank project in android studio with simple empty activity. Step 2 :  Use the below code in colors.xml file <?xml version="1.0" encoding="utf-8"?> <resources> <color name= "purple_200" > #FFBB86FC </color> <color name= "purple_500" > #FF6200EE </color> <color name= "purple_700" > #FF3700B3 </color> <color name= "teal_200" > #FF03DAC5 </color> <color name= "teal_700" > #FF018786 </color> <color name= "black" > #FF000000 </color> <color name= "white" > #FFFFFFFF </color> </resources> Step ...

 If we see the google play store android app, we can see that the app list in horizontal recycler view hold a property that the first property hold always full visible or not visible, but a portion visible is not seeing. This property is snap property. In this article I show you how to use it in our own application. Basically we use two type of snap. Center Snap and start snap. I show you both here. So read full article here. The Key Moment code is here- For center snap you need to write 2 lines code- //center Snap val snapHelper = LinearSnapHelper() snapHelper.attachToRecyclerView(recyclerView1) For start snap, create a class in kotlin say StartSnapHelper.kt package com.example.snaphelpersampleapp import android.view.View import androidx.recyclerview.widget.LinearLayoutManager import androidx.recyclerview.widget.LinearSnapHelper import androidx.recyclerview.widget.OrientationHelper import androidx.recyclerview.widget.RecyclerView class StartSnapH...