LeetCode – Circular Permutation in Binary Representation (Java)
Given 2 integers n and start. Your task is return any permutation p of (0,1,2…..,2^n -1) such that : p[0] = start p[i] and p[i+1] differ by only one bit
Stateless Widget in Flutter
Before beginning development with Flutter, one should familiar with Widgets like Stateless and Stateful. Today we will talk on Stateless Widget. Stateless Widget As the name suggests, Stateless widgets are immutable. Stateless widgets remain
Stateful Widget in Flutter
When building Flutter apps, most of the time we are dealing with widgets. Widgets are everywhere in Flutter. Flutter uses widgets to describe reusable building blocks in the user interface.
LeetCode – Reverse Words in a String
Given an input string, reverse the string word by word. Example 1: Input: “the sky is blue” Output: “blue is sky the” Example 2: Input: ” hello world! ” Output:
Find pair with given difference K in the array
Given an array A of integers and another non-negative integer K, find if there exist 2 indices i and j such that A[i] – A[j] = K, i != j.
Find Path with Maximum Gold
In a gold mine grid of size m * n, each cell in this mine has an integer representing the amount of gold in that cell, 0 if it is
Largest Continuous Sub Array with Zero Sum – Java
Find the largest continuous sequence in an array which sums to zero. Example: Input: { 1 , 3 , -1 , 2 , -4 , 1} Output: {3 , -1
Colorful Number
For Given Number N find if its COLORFUL number or not Number is COLORFUL number if product of every digit of a contiguous subsequence is different. A number can be
LeetCode – Minimum Absolute Difference
Given an array of distinct integers arr[], find all pairs of elements with the minimum absolute difference of any two elements. Return a list of pairs in ascending order(with respect
Given an Array of Integers and Target Number, Find Pair having Sum as Target
Given an array of integers A[], find two numbers such that they add up to a specific target number B. The program should return indices of the two numbers such
Group all anagrams from a given array of Strings
Given an array of strings, return all groups of strings that are anagrams. Represent a group by a list of integers representing the index in the original list. Look at
Understand SOAP Message Structure
Overview In the previous articles, We have gone through basics of SOAP Webservice and Steps to create SOAP Webservice. As we are knowing that SOAP forms message before communicating with
Test SOAP Web Service using Eclipse
Overview In a previous article, we have created SOAP Web service with JAX-WS API. Also, we have covered different ways to consume or test SOAP Web Service. Today we will
Consume SOAP Web Service with wsimport
Overview In a previous article, we have created SOAP Web service with JAX-WS API. Next part is how can we consume it in Java, How to create stub files or
SOAP Web Service with JAX-WS API
Overview In the previous article we have gone through an overview of SOAP web service and advantage and disadvantage of it. In today’s article, we will create SOAP web service
SOAP Web Services
Overview As per W3C, web service can be defined as, a software system designed to support interoperable machine-to-machine interaction over a network. Web services are: 1. Platform independent 2. Designed
Java Memory Profiling with VisualVM
Overview In the previous article, we navigate through jmap tool to analyze application performance, jmap is a console based which did not have a visual interface to analyze the data,
WebSocket Client API in Java 9 with Example
Overview WebSocket API is another addition to the java.httpclient package in Java 9. As explained earlier, it enables having full duplex communication between the client and the server. This package
HTTP/2 Client in Java 9
Overview In Java 9, Oracle has released a new version of HTTP client API which will support HTTP/2 protocol and WebSocket features. As existing HTTP Client API has numerous issues
Module Directives in Java 9
Overview We have discussed Java 9 Modularity and Module System. Also we have discussed How to create first Module in Java 9 using eclipse. Here we will discuss in detail
Mediator Design Pattern in Java
Overview Mediator design pattern is a behavioral design pattern. It is used to provide a centralized communication medium between different objects in a system. The Gang of Four has indicated
Observer Design Pattern in Java
Overview Observer Pattern is a behavioral type design pattern. According to GoF, the observer design pattern is; The observer pattern defines a one-to-many dependency between objects so that when one
Difference between ArrayList and LinkedList
1. Memory Allocation ArrayList uses Array as underline datastructure to store the elements, and we know Array stores elements in consecutive manner. In LinkedList, elements can be stored at any
Chain of Responsibility Design Pattern in Java
Overview Chain of Responsibility Pattern can be used when we want to give more than one object a chance to handle a request. The pattern can be used to achieve
JShell with Example – Java 9
Java 9 introduces JShell and a Read-Eval-Print Loop (REPL) for the Java Programming Language. REPL allows us to evaluate code snippets such as declarations, statements, expressions. We can test our
Can You Crack The Code : Riddle Mystery 2
Can You Crack The Code Riddle Mystery 2 In this article “Can You Crack The Code Riddle Mystery 2”, you will find very interesting Riddle Mystery. A Number Lock has
Can You Crack The Code : Riddle Mystery 1
Can You Crack The Code Riddle Mystery 1 In this article “Can You Crack The Code Riddle Mystery 1”, you will find very interesting Riddle Mystery. A Number Lock has
Bubble Sort Algorithm
Bubble Sort Algorithm Bubble sort algorithm, sometimes referred to as sinking sort, is a simple sorting algorithm that repeatedly steps through the list to be sorted, compares each pair of