dubesar/ultimate-java-resources

Java programming. All in one Java Resource for learning. Updated every day and up to date. All Algorithms and DS along with Development in Java. Beginner to Advanced. Join the Discord link.

Java Programming

Give a Star, if you like the Repository and if you consider it as a useful resource for learning Java (Accepting Pull Request for Hacktoberfest 22)

Introduction

This repository aims at helping new Java developers. It contains examples of simple programs and algorithms.

Main Topics

The following main topics have been contributed in this repository.

• Data Structures
• Algorithms
• Android Projects
• Machine Learning
• Networking & Security
• Object-Oriented Programming (OOPs)

Each of the main topics have been divided into further sub categories.

Breakdown of the Topics

Topic	Collection
Data Structures	LinkedList, Heaps, Arrays, ArrayLists, HashMaps, Trees, Graphs, Stacks, Queues, Deque
Algorithms	Sorting, Searching, BFS, Dijkstra, Dynamic Programming, NQueens
Android Development	Weather Report, GithubProfile App, DiceRoller, Password Generator, MemeShare App, CountDown Timer, Book Finder, Notepad App, Birthday Wish App, BMI Calculator, Compass App, Tic Tac Toe App, Voting App, Age Calculator, Binary to Decimal Converter, Coffee Ordering App, Currency Converter App, Media Player, QR Bar Code Scanner App, Random Number Generator, Wind Chill Calculator, Word Counter App
Machine Learning	Linear Regression, Logistic Regression, KMeans2d, Random Forest
Networking & Security	Socket, Key Pair, Signature, Socket Programming, Thread Programming
Operating System	ProducerConsumer
OOP	Abstraction, Encapsulation, Inheritance, Polymorphism, Manipulators, Virtual Function, Inline Function, Friend Function

Data Structures

Visit the Data Structures repository if you would like to see examples for the following Java programs.

• Big Integer
• LinkedList, Circular LinkedList
• Max and Min Heaps, Priority Queues
• ArrayList
• BST
• HashMap, HashSet, TreeMap
• Loops, Arrays
• Segment Tree, Tree Traversal, Fenwick Tree

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Algorithms

Visit the Algorithms repository if you would like to see examples for the following Java programs.

• Breadth First Search, Depth First Search
• Counting Sort, Heap Sort, Merge Sort, Bubble Sort, Quick Sort, Topological Sort, Bubble Sort
• Dijkstra
• Binary Search, Interpolation Search, Ternary Search
• Segment Tree, Tree Traversal
• Prefix Sum

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Android Development

Visit the Android Development repository if you would like to see examples for the following Java programs.

• Countdown Timer App
• Github Profiles App
• Meme Share App
• Password Generator App
• Weather Report
• Book Finder
• Dice Roller
• Notepad App
• Birthday Wish App
• BMI Calculator
• Compass App
• Tic Tac Toe App
• Voting App
• Age Calculator
• Binary to Decimal Converter
• Coffee Ordering App
• Currency Converter App
• Media Player
• Qr Bar Code Scanner App
• Random Number Generator
• Wind Chill Calculator
• Word Counter App

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Machine Learning

Visit the Machine Learning repository if you would like to see examples for the following Java programs.

• Linear Regression
• KMeans 2D
• Logistic Regression

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Network & Security

Visit the Network & Security repository if you would like to see examples for the following Java programs.

• Socket Programming
• Thread Programming
• Columnar Cipher
• Rectangular Parity
• Key Pair
• Signature
• SecureRandom

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Object-Oriented Programming

Visit the OOP repository if you would like to see examples for the following Java programs.

• Abstraction
• Encapsulation
• Inheritance
• Manipulators
• Polymorphism

Project Maintainers

This project is founded by Sarvesh Dubey . A Software Developer working at Amazon Web Services.

ultimate-java-resources's Issues

Add Linear regeression

Add code for linear regression and comment on it properly.

Add Treeset in Java

Add treeset example in Java and remember to comment with proper explanation.

Java in Networking (Socket Programming)

Create a Networking folder and add documentation of Socket programming with proper markdown and also give example in documentation in form of code.

Also comment the codes well and write the documentation properly.

Add Connected components of a graph

Add code for number of connected components in a graph. Properly comment the code.

Add arrayList example.

Give an example of ArrayList and explain using comments.

Matrix Chain Multiplication.

Matrix chain multiplication in Java and comment on the code giving examples.

Add BFS for a given graph.

Add BFS code with an example in algorithms. Comment the code properly.

Implementation of Queue using ArrayList

Use ArrayList to make a queue. Add comments properly.

Add implementation of Trie in Java

Add implementation of Trie in Java using one example of a dictionary-based graph and comment on the code properly.

Add subset sum problem in Java

Add subset problem using Dynamic Programming and comment the code properly.

Add implementation of prefix array in Java

Add implementation of prefix array in ArrayList. Comment the code properly

Add Dijkstra for a given graph.

Add Dijkstra code for a given graph having a start and end point. Comment the code properly.

Secure Random methods in Java

Make a security folder and explain the secure Random methods in the form .md file and also embed relevant code and explain it properly.

Add two pointer method example

Add two pointer algorithm example in Java. Comment the code properly

0-1 Knapsack problem

Implement 0-1 Knapsack problem in Java and comment the code properly.

Optimization in processing speed

For making calculations of O(n^2) to O(n) sliding window algo. can be used

Add LIS in Dynamic Programming

Add LIS code in Dynamic Programming and explain the code using comments.

Improve Readme

Add relevant functions that have been added till now and and give introduction of the repository.

Add linkedlist and associated methods

Add linkedlist and all the operations like deletion, insertion and all possible functions and explain each function with comments

Add loop in Java

Add different methods to use loops in Java including for, while, for each.

Add LCS in Dyanamic Programming

Add code for LCS in dynamic programming and explain the code using comments.

Add Euler Totient Function

Make a new math folder and add code to the totient of a natural number and comment on the code properly.

Add traversals for tree in Java

Add inorder, preorder and postorder traversals and comment properly.

Add coin change in Java.

Add implementation of coin change in Java and create a separate folder for Dynamic Programming. Comment the code properly and explain the code in the form of comments.

Add Polymorphism to oops

Add Polymorphism concept in oops with proper guidelines mentioned for oops section.

Calculate nth prime number

Add all the possible methods to calculate nth prime number. Comment the code properly.

Update Readme

Update Readme according to the present format with all the present stuffs in the code base.
Properly mention each and every algorithms newly added.

Add hashset in Java

Add HashSet in Java Collections with example and comment it properly.

Add edit distance in Java.

Add implementation of edit distance in Java and comment the code properly. Add your code in Dynamic Programming folder if present else create the Dynamic Programming folder.

Add Hashmaps to Readme

Segeregate files according to Data Structures and Algorithms.

Seperate the code files accordingly to where they should belong like make a seperate DS folder and put all the relevant stuffs and same for algos

Like prefix sum array, binary search etc should be in algos and java loops, linkedlist , stack in data structures . Name the folder properly.

Primality Tests for Prime Number

Update Readme

Add oops section for readme with proper markdown.

Logistic regression using JAVA

Add a Machine learning folder and then code for logistic regression and comment the code properly

Update Readme

Add Stack and Queue to readme and follow markdown as followed in current readme.

Add basic oops concepts

Create a Documentation folder and add basic documentation for OOPS having concepts like abstraction , encapsulation , inheritance. Do give real world examples for each. And possibly add small code snippets inside the documentation itself for each related concept.

Update README

Update readme with all the new updates in the repository and follow the markdown in the readme

Binary search using inbuilt functions

Add binarysearch inbuilt methods.

Add DFS for a given graph

Add DFS algorithm and explain using example. Comment the code properly.

Add lower bound and upper bound similar to c++ in Java.

Add lower bound and upper bound in Java. Comment the code properly.

Weighted Job Scheduling in Java

Implement Weighted Job Scheduling and comment on the code properly by giving examples.

Add stack operations in Java using ArrayList

Add stack operation using ArrayList like push and pop

Add climbing stairs problem in DP

Add implementation of climbing stairs in Java and comment the code properly. Add your code in Dynamic Programming folder if present else create the Dynamic Programming folder.

Add min heap and max heap

Add min heap and max heap implementation in Java and comment properly in code.

Add heapsort

Add heapsort implementation in Java. Also write if any inbuilt functions are present. Comment the code properly.

Add priority queue

Add priority queue example with proper comments.

Add Hashmaps and its methods.

Add Hashmaps , it's implementation. Properly comment the code and also put jt in relevant folder.

Implemenation of 2d Array in Java

Add implementation of 2d Array in Java using ArrayList and properly comment on the code.

Add fastest way to compute number of divisors of a number.

Add code to compute the number of divisors of a number and add the comments properly.

Add search methods for ArrayList.

Add both Binary search as well as Linear search returning the index of the required element and throw an error if there is no presence of the element. Comment the code properly.