Java - Medium Articles

How to Add Mask to an EditText in Android?

EditText is an android widget. It is a User Interface element used for entering and modifying data. It returns data in String format. Masking refers… Read More

Android-View

Android

Java

Kotlin

Introduction to Processing | Java

Processing is an open-source programming language and development environment that is built on top of the Java programming language. It is specifically designed for artists,… Read More

Algorithms

DSA

Java

Longest subarray with absolute difference between elements less than or equal to K using Heaps

Given an array arr[] of N integers and an integer K, our task is to find the length of the longest subarray such that for… Read More

subarray

Algorithms

Arrays

Competitive Programming

DSA

Heap

Java

Java Programs

Print the nodes having exactly one child in a Binary tree

Given a binary tree, the task is to print all the nodes having exactly one child. Print “-1” if no such node exists.Examples: Input: 2… Read More

tree-traversal

Data Structures

DSA

Java

Tree

How to pre populate database in Android using SQLite Database

Introduction : Often, there is a need to initiate an Android app with an already existing database. This is called prepopulating a database. In this… Read More

android 1

DBMS

Java

Escape Sequences in Java

A character with a backslash (\) just before it is an escape sequence or escape character. We use escape characters to perform some specific task.… Read More

Java

Java Programs

Spinner in Android with Example

Android Spinner is a view similar to the dropdown list which is used to select one option from the list of options. It provides an… Read More

android 1

Java

How to validate identifier using Regular Expression in Java

Given a string str, the task is to check whether the string is a valid identifier or not using the Regular Expression. The valid rules for… Read More

java-regular-expression

DSA

Java

Java Programs

Strings

How to add Bullet list in a RecyclerView in Android?

Recycler View allows us to show a list of items but to convert our list into the bulleted list we have to do some extra… Read More

android 1

Java

Queries for Nth smallest character for a given range in a string

Given a string str which consists of only lowercase letters and an array arr[][] that represents range queries on the given string str where each… Read More

C++

DSA

Hash

Java

Strings

Minimum broadcast range required by M towers to reach N houses

Given an array a containing positions of N houses, and an array b containing positions of M radio towers, each placed along a horizontal line,… Read More

Arrays

DSA

Java

Mathematical

School Programming

Count of Triplets

Given N points in a plane in the form of 2D array such that every row consist of two integer L and R where L… Read More

Advanced Data Structure

DSA

Experiences

Hash

Internship

Java

Programming Language

Write From Home

Screen Orientations in Android with Examples

Screen Orientation, also known as screen rotation, is the attribute of activity element in android. When screen orientation change from one state to other, it… Read More

Android-Misc

Android

Java

Atomic Variables in Java with Examples

In multithreading, the shared entity mostly leads to a problem when concurrency is incorporated. A shared entity such as, mutable object or variable, might be… Read More

Java-Multithreading

Java-util-concurrent-atomic package

DBMS

Java

Java Programs

How to find the Entry with largest Key in a Java Map

Given a map in Java, the task is to find out the entry in this map with the highest key. Examples: Input: Map = {ABC… Read More

java-map

Java-Map-Programs

Java

How to Share a Captured Image to Another Application in Android?

Pre-requisite: How to open a Camera through Intent and capture an image In this article, we will try to send the captured image (from this… Read More

Android

Java

Kotlin

JDBC Using Model Object and Singleton Class

This article explains how to perform JDBC operation using a Model object and a Singleton connection class from a MySQL database . JDBC is an… Read More

JDBC

mysql

DBMS

Design Pattern

Java

Java Programs

SQL

System Design

Frequency of an integer in the given array using Divide and Conquer

Given an unsorted array arr[] and an integer K, the task is to count the occurrences of K in the given array using the Divide… Read More

Arrays

C Language

C Programs

C++

C++ Programs

Divide and Conquer

DSA

Java

Python

Recursion

Compact Strings in Java 9 with Examples

Prerequisites: String Compact String is one of the performance enhancements introduced in the JVM as part of JDK 9. Till JDK 8, whenever we create… Read More

Java-Strings

Technical Scripter 2019

Java

Technical Scripter

Minimum Spanning Tree using Priority Queue and Array List

Given a bi-directed weighted (positive) graph without self-loops, the task is to generate the minimum spanning tree of the graph.Examples: Input: N = 9, E… Read More

MST

Advanced Data Structure

Competitive Programming

Data Structures

DSA

Graph

Greedy

Java