List of Java Project Ideas ๐ก๐จ๐ปโ๐ปโ
Beginner Projects
๐น Calculator
๐น To-Do List App
๐น Number Guessing Game
๐น Password Generator
๐น Flashcard Quizzer
๐น Simple Chatbot
๐น Weather App
๐น Unit Converter
๐น Rock-Paper-Scissors Game
Intermediate Projects
๐ธ Personal Diary
๐ธ Web Scraping Tool
๐ธ Expense Tracker
๐ธ Spring Boot Blog
๐ธ Image Gallery
๐ธ Chat Application
๐ธ Pomodoro Timer
๐ธ Basic Game with JavaFX
Advanced Projects
๐บ Social Media Dashboard
๐บ Machine Learning Model
๐บ Data Visualization Tool
๐บ Blockchain Simulation
๐บ Chatbot with NLP
๐บ File Organizer
Free Java Resources: https://t.me/Java_Programming_Notes
Beginner Projects
๐น Calculator
๐น To-Do List App
๐น Number Guessing Game
๐น Password Generator
๐น Flashcard Quizzer
๐น Simple Chatbot
๐น Weather App
๐น Unit Converter
๐น Rock-Paper-Scissors Game
Intermediate Projects
๐ธ Personal Diary
๐ธ Web Scraping Tool
๐ธ Expense Tracker
๐ธ Spring Boot Blog
๐ธ Image Gallery
๐ธ Chat Application
๐ธ Pomodoro Timer
๐ธ Basic Game with JavaFX
Advanced Projects
๐บ Social Media Dashboard
๐บ Machine Learning Model
๐บ Data Visualization Tool
๐บ Blockchain Simulation
๐บ Chatbot with NLP
๐บ File Organizer
Free Java Resources: https://t.me/Java_Programming_Notes
๐5โค3
โ
List and Set in Java Collections Framework :
๐ LIST :
๐ธ List in Java provides the facility to maintain the ordered collection.
๐น It contains the index-based methods to insert, update, delete and search the elements.
๐ธ It can have the duplicate elements also.
๐น We can also store the null elements in the list.
๐ SET :
๐ธ Set interface in Java is present in jave.util package.
๐นIt extends the Collection interface.
๐ธ It represents the unordered set of elements which doesn't allow us to store the duplicate items.
๐น We can store at most one null value in Set.
๐ธ Set is implemented by HashSet, LinkedHashSet and TreeSet.
Like for more โค๏ธ
๐ LIST :
๐ธ List in Java provides the facility to maintain the ordered collection.
๐น It contains the index-based methods to insert, update, delete and search the elements.
๐ธ It can have the duplicate elements also.
๐น We can also store the null elements in the list.
๐ SET :
๐ธ Set interface in Java is present in jave.util package.
๐นIt extends the Collection interface.
๐ธ It represents the unordered set of elements which doesn't allow us to store the duplicate items.
๐น We can store at most one null value in Set.
๐ธ Set is implemented by HashSet, LinkedHashSet and TreeSet.
Like for more โค๏ธ
๐2โค1
๐ PERFORMANCE TUNING: Boost Your System Like a Pro! โก๏ธ
Is your application slow? Facing database bottlenecks? Or maybe network issues? Performance tuning is the key! Hereโs a breakdown of essential optimization areas to supercharge your system:
๐น Code Tuning ๐ฅ
Optimize your code by managing CPU, memory, and other resources efficiently. A few tweaks can make a BIG difference!
๐น Infrastructure Tuning ๐
Benchmark, scale, and optimize storage to ensure your hardware and cloud infrastructure are performing at their best.
๐น Architecture Tuning โ๏ธ
Implement caching, loose coupling, and asynchronous processing for a seamless and scalable system.
๐น Configuration Tuning โ๏ธ
Fine-tune your app's settings for maximum efficiencyโmaster configuration tuning is crucial!
๐น Network Tuning ๐
Reduce latency, optimize traffic flow, and secure your network with firewall & DNS adjustments.
๐น Database Tuning ๐
Optimize queries, indexes, and partitions to speed up data retrieval and improve overall DB performance.
Is your application slow? Facing database bottlenecks? Or maybe network issues? Performance tuning is the key! Hereโs a breakdown of essential optimization areas to supercharge your system:
๐น Code Tuning ๐ฅ
Optimize your code by managing CPU, memory, and other resources efficiently. A few tweaks can make a BIG difference!
๐น Infrastructure Tuning ๐
Benchmark, scale, and optimize storage to ensure your hardware and cloud infrastructure are performing at their best.
๐น Architecture Tuning โ๏ธ
Implement caching, loose coupling, and asynchronous processing for a seamless and scalable system.
๐น Configuration Tuning โ๏ธ
Fine-tune your app's settings for maximum efficiencyโmaster configuration tuning is crucial!
๐น Network Tuning ๐
Reduce latency, optimize traffic flow, and secure your network with firewall & DNS adjustments.
๐น Database Tuning ๐
Optimize queries, indexes, and partitions to speed up data retrieval and improve overall DB performance.
โค1๐1
2 Month Roadmap to learn Java and Spring from basics to advanced
Week 1-2: Core Java
- Basic Syntax: Data types, operators, loops (for, while, do-while)
- OOP Concepts: Classes, objects, inheritance, polymorphism, encapsulation, abstraction
- Collections Framework: List, Set, Map, Queue, Iterator, etc.
- Exception Handling: Try-catch, custom exceptions, multi-catch
- File I/O: Reading/writing files using java.io and java.nio
- Java 8+ Features: Lambdas, Streams, Optional, Functional Interfaces
- Multithreading: Threads, Runnable, ExecutorService, Future, and basic synchronization
Week 3-4: Advanced Java & JDBC
- JVM Internals: ClassLoader, JIT, memory management, garbage collection
- Generics: Usage and wildcards
- Design Patterns: Singleton, Factory, Strategy, Observer, Dependency Injection (Intro)
- JDBC: Connecting with databases (CRUD operations), PreparedStatement, Connection pooling
Week 5-6: Spring Framework (Basics)
- Spring Core
- Dependency Injection (DI) and Inversion of Control (IoC)
- Beans, Scopes, and Bean Life Cycle
- Autowiring and Spring Annotations
- Spring AOP: Aspect-Oriented Programming fundamentals
- Spring Data JPA: Basic CRUD operations with JPA
- Entities, Repositories, and Custom Queries
Week 7: Spring Boot (Basics)
- Spring Boot Fundamentals: Understanding the Spring Boot architecture
- REST API creation
- Spring Boot Annotations (@RestController, @RequestMapping, etc.)
- Running a Spring Boot application
- Spring Boot Auto Configuration: Application properties and profiles
- Spring Boot with Database: Integrate Spring Boot with MySQL using Spring Data JPA
Week 8: Spring Boot (Advanced)
- Security: Introduction to Spring Security (Basic Authentication)
- Advanced Spring Boot Features: Exception handling (@ControllerAdvice)
- Logging with Spring Boot
- Pagination and Sorting
- Testing: Write unit tests using JUnit and Mockito in Spring Boot
Like for more โค๏ธ
Week 1-2: Core Java
- Basic Syntax: Data types, operators, loops (for, while, do-while)
- OOP Concepts: Classes, objects, inheritance, polymorphism, encapsulation, abstraction
- Collections Framework: List, Set, Map, Queue, Iterator, etc.
- Exception Handling: Try-catch, custom exceptions, multi-catch
- File I/O: Reading/writing files using java.io and java.nio
- Java 8+ Features: Lambdas, Streams, Optional, Functional Interfaces
- Multithreading: Threads, Runnable, ExecutorService, Future, and basic synchronization
Week 3-4: Advanced Java & JDBC
- JVM Internals: ClassLoader, JIT, memory management, garbage collection
- Generics: Usage and wildcards
- Design Patterns: Singleton, Factory, Strategy, Observer, Dependency Injection (Intro)
- JDBC: Connecting with databases (CRUD operations), PreparedStatement, Connection pooling
Week 5-6: Spring Framework (Basics)
- Spring Core
- Dependency Injection (DI) and Inversion of Control (IoC)
- Beans, Scopes, and Bean Life Cycle
- Autowiring and Spring Annotations
- Spring AOP: Aspect-Oriented Programming fundamentals
- Spring Data JPA: Basic CRUD operations with JPA
- Entities, Repositories, and Custom Queries
Week 7: Spring Boot (Basics)
- Spring Boot Fundamentals: Understanding the Spring Boot architecture
- REST API creation
- Spring Boot Annotations (@RestController, @RequestMapping, etc.)
- Running a Spring Boot application
- Spring Boot Auto Configuration: Application properties and profiles
- Spring Boot with Database: Integrate Spring Boot with MySQL using Spring Data JPA
Week 8: Spring Boot (Advanced)
- Security: Introduction to Spring Security (Basic Authentication)
- Advanced Spring Boot Features: Exception handling (@ControllerAdvice)
- Logging with Spring Boot
- Pagination and Sorting
- Testing: Write unit tests using JUnit and Mockito in Spring Boot
Like for more โค๏ธ
๐5
Java Basics every beginner should learn to build a strong foundation:
1. Hello World & Setup
Install JDK and an IDE (like IntelliJ or Eclipse)
Write your first program: public class HelloWorld
2. Data Types & Variables
Primitive types: int, double, char, boolean
Non-primitive types: String, Arrays, Objects
Type casting (implicit & explicit)
3. Operators
Arithmetic: + - * / %
Comparison: == != > < >= <=
Logical: && || !
4. Control Flow
If, else if, else
Switch-case
Loops: for, while, do-while
break and continue
5. Functions (Methods)
Syntax: public static returnType methodName(params)
Method overloading
Return types & parameter passing
6. Object-Oriented Programming (OOP)
Classes & Objects
this keyword
Constructors (default & parameterized)
7. OOP Concepts
Encapsulation (private variables + getters/setters)
Inheritance (extends keyword)
Polymorphism (method overriding)
Abstraction (abstract classes & interfaces)
8. Arrays & ArrayList
Declaring and iterating arrays
ArrayList methods: add, remove, get, size
Multidimensional arrays
9. Exception Handling
Try-catch-finally blocks
throw and throws
Custom exceptions
10. Basic Input/Output
Scanner class for user input
System.out.println() for output
Free Java Resources: https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s
ENJOY LEARNING ๐๐
1. Hello World & Setup
Install JDK and an IDE (like IntelliJ or Eclipse)
Write your first program: public class HelloWorld
2. Data Types & Variables
Primitive types: int, double, char, boolean
Non-primitive types: String, Arrays, Objects
Type casting (implicit & explicit)
3. Operators
Arithmetic: + - * / %
Comparison: == != > < >= <=
Logical: && || !
4. Control Flow
If, else if, else
Switch-case
Loops: for, while, do-while
break and continue
5. Functions (Methods)
Syntax: public static returnType methodName(params)
Method overloading
Return types & parameter passing
6. Object-Oriented Programming (OOP)
Classes & Objects
this keyword
Constructors (default & parameterized)
7. OOP Concepts
Encapsulation (private variables + getters/setters)
Inheritance (extends keyword)
Polymorphism (method overriding)
Abstraction (abstract classes & interfaces)
8. Arrays & ArrayList
Declaring and iterating arrays
ArrayList methods: add, remove, get, size
Multidimensional arrays
9. Exception Handling
Try-catch-finally blocks
throw and throws
Custom exceptions
10. Basic Input/Output
Scanner class for user input
System.out.println() for output
Free Java Resources: https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s
ENJOY LEARNING ๐๐
๐1๐1
Typical java interview questions sorted by experience
Junior
* Name some of the characteristics of OO programming languages
* What are the access modifiers you know? What does each one do?
* What is the difference between overriding and overloading a method in Java?
* Whatโs the difference between an Interface and an abstract class?
* Can an Interface extend another Interface?
* What does the static word mean in Java?
* Can a static method be overridden in Java?
* What is Polymorphism? What about Inheritance?
* Can a constructor be inherited?
* Do objects get passed by reference or value in Java? Elaborate on that.
* Whatโs the difference between using == and .equals on a string?
* What is the hashCode() and equals() used for?
* What does the interface Serializable do? What about Parcelable in Android?
* Why are Array and ArrayList different? When would you use each?
* Whatโs the difference between an Integer and int?
* What is a ThreadPool? Is it better than using several โsimpleโ threads?
* What the difference between local, instance and class variables?
Mid
* What is reflection?
* What is dependency injection? Can you name a few libraries? (Have you used any?)
* What are strong, soft and weak references in Java?
* What does the keyword synchronized mean?
* Can you have โmemory leaksโ on Java?
* Do you need to set references to null on Java/Android?
* What does it means to say that a String is immutable?
* What are transient and volatile modifiers?
* What is the finalize() method?
* How does the try{} finally{} works?
* What is the difference between instantiation and initialisation of an object?
* When is a static block run?
* Why are Generics are used in Java?
* Can you mention the design patterns you know? Which of those do you normally use?
* Can you mention some types of testing you know?
Senior
* How does Integer.parseInt() works?
* Do you know what is the โdouble check lockingโ problem?
* Do you know the difference between StringBuffer and StringBuilder?
* How is a StringBuilder implemented to avoid the immutable string allocation problem?
* What does Class.forName method do?
* What is Autoboxing and Unboxing?
* Whatโs the difference between an Enumeration and an Iterator?
* What is the difference between fail-fast and fail safe in Java?
* What is PermGen in Java?
* What is a Java priority queue?
* *s performance influenced by using the same number in different types: Int, Double and Float?
* What is the Java Heap?
* What is daemon thread?
* Can a dead thread be restarted?
Source: medium.
Junior
* Name some of the characteristics of OO programming languages
* What are the access modifiers you know? What does each one do?
* What is the difference between overriding and overloading a method in Java?
* Whatโs the difference between an Interface and an abstract class?
* Can an Interface extend another Interface?
* What does the static word mean in Java?
* Can a static method be overridden in Java?
* What is Polymorphism? What about Inheritance?
* Can a constructor be inherited?
* Do objects get passed by reference or value in Java? Elaborate on that.
* Whatโs the difference between using == and .equals on a string?
* What is the hashCode() and equals() used for?
* What does the interface Serializable do? What about Parcelable in Android?
* Why are Array and ArrayList different? When would you use each?
* Whatโs the difference between an Integer and int?
* What is a ThreadPool? Is it better than using several โsimpleโ threads?
* What the difference between local, instance and class variables?
Mid
* What is reflection?
* What is dependency injection? Can you name a few libraries? (Have you used any?)
* What are strong, soft and weak references in Java?
* What does the keyword synchronized mean?
* Can you have โmemory leaksโ on Java?
* Do you need to set references to null on Java/Android?
* What does it means to say that a String is immutable?
* What are transient and volatile modifiers?
* What is the finalize() method?
* How does the try{} finally{} works?
* What is the difference between instantiation and initialisation of an object?
* When is a static block run?
* Why are Generics are used in Java?
* Can you mention the design patterns you know? Which of those do you normally use?
* Can you mention some types of testing you know?
Senior
* How does Integer.parseInt() works?
* Do you know what is the โdouble check lockingโ problem?
* Do you know the difference between StringBuffer and StringBuilder?
* How is a StringBuilder implemented to avoid the immutable string allocation problem?
* What does Class.forName method do?
* What is Autoboxing and Unboxing?
* Whatโs the difference between an Enumeration and an Iterator?
* What is the difference between fail-fast and fail safe in Java?
* What is PermGen in Java?
* What is a Java priority queue?
* *s performance influenced by using the same number in different types: Int, Double and Float?
* What is the Java Heap?
* What is daemon thread?
* Can a dead thread be restarted?
Source: medium.
๐6
18 Most common used Java List methods
1. add(E element) - Adds the specified element to the end of the list.
2. addAll(Collection<? extends E> c) - Adds all elements of the specified collection to the end of the list.
3. remove(Object o) - Removes the first occurrence of the specified element from the list.
4. remove(int index) - Removes the element at the specified position in the list.
5. get(int index) - Returns the element at the specified position in the list.
6. set(int index, E element) - Replaces the element at the specified position in the list with the specified element.
7. indexOf(Object o) - Returns the index of the first occurrence of the specified element in the list.
8. contains(Object o) - Returns true if the list contains the specified element.
9. size() - Returns the number of elements in the list.
10. isEmpty() - Returns true if the list contains no elements.
11. clear() - Removes all elements from the list.
12. toArray() - Returns an array containing all the elements in the list.
13. subList(int fromIndex, int toIndex) - Returns a view of the portion of the list between the specified fromIndex, inclusive, and toIndex, exclusive.
14. addAll(int index, Collection<? extends E> c) - Inserts all elements of the specified collection into the list, starting at the specified position.
15. iterator() - Returns an iterator over the elements in the list.
16. sort(Comparator<? super E> c) - Sorts the elements of the list according to the specified comparator.
17. replaceAll(UnaryOperator<E> operator) - Replaces each element of the list with the result of applying the given operator.
18. forEach(Consumer<? super E> action) - Performs the given action for each element of the list until all elements have been processed or the action throws an exception.
Share for more: https://t.me/programming_guide
1. add(E element) - Adds the specified element to the end of the list.
2. addAll(Collection<? extends E> c) - Adds all elements of the specified collection to the end of the list.
3. remove(Object o) - Removes the first occurrence of the specified element from the list.
4. remove(int index) - Removes the element at the specified position in the list.
5. get(int index) - Returns the element at the specified position in the list.
6. set(int index, E element) - Replaces the element at the specified position in the list with the specified element.
7. indexOf(Object o) - Returns the index of the first occurrence of the specified element in the list.
8. contains(Object o) - Returns true if the list contains the specified element.
9. size() - Returns the number of elements in the list.
10. isEmpty() - Returns true if the list contains no elements.
11. clear() - Removes all elements from the list.
12. toArray() - Returns an array containing all the elements in the list.
13. subList(int fromIndex, int toIndex) - Returns a view of the portion of the list between the specified fromIndex, inclusive, and toIndex, exclusive.
14. addAll(int index, Collection<? extends E> c) - Inserts all elements of the specified collection into the list, starting at the specified position.
15. iterator() - Returns an iterator over the elements in the list.
16. sort(Comparator<? super E> c) - Sorts the elements of the list according to the specified comparator.
17. replaceAll(UnaryOperator<E> operator) - Replaces each element of the list with the result of applying the given operator.
18. forEach(Consumer<? super E> action) - Performs the given action for each element of the list until all elements have been processed or the action throws an exception.
Share for more: https://t.me/programming_guide
๐4๐1
Java Roadmap
|
|-- Fundamentals
| |-- Basics of Programming
| | |-- Introduction to Java
| | |-- Java Development Kit (JDK) and Java Runtime Environment (JRE)
| | |-- Setting Up Development Environment (IDE: IntelliJ IDEA, Eclipse, etc.)
| |
| |-- Syntax and Structure
| | |-- Basic Syntax
| | |-- Variables and Data Types
| | |-- Operators and Expressions
|
|-- Control Structures
| |-- Conditional Statements
| | |-- If-Else Statements
| | |-- Switch Case
| |
| |-- Loops
| | |-- For Loop
| | |-- While Loop
| | |-- Do-While Loop
| |
| |-- Exception Handling
| | |-- Try-Catch Block
| | |-- Finally Block
| | |-- Throw and Throws Keywords
|
|-- Object-Oriented Programming (OOP)
| |-- Basics of OOP
| | |-- Classes and Objects
| | |-- Methods and Constructors
| |
| |-- Inheritance
| | |-- Single and Multiple Inheritance
| | |-- Method Overriding
| | |-- Super Keyword
| |
| |-- Polymorphism
| | |-- Method Overloading
| | |-- Runtime Polymorphism
| | |-- Dynamic Method Dispatch
| |
| |-- Encapsulation
| | |-- Access Modifiers (Public, Private, Protected)
| | |-- Getters and Setters
| | |-- Data Hiding
| |
| |-- Abstraction
| | |-- Abstract Classes
| | |-- Interfaces
|
|-- Advanced Java
| |-- Collections Framework
| | |-- List (ArrayList, LinkedList)
| | |-- Set (HashSet, TreeSet)
| | |-- Map (HashMap, TreeMap)
| | |-- Queue (PriorityQueue, LinkedList)
| |
| |-- Concurrency
| | |-- Multithreading (Creating Threads, Thread Lifecycle)
| | |-- Synchronization
| | |-- Concurrency Utilities (Executors Framework, Callable and Future, Locks and Semaphores)
|
|-- Java Standard Libraries
| |-- I/O Streams
| | |-- File Handling (File Class, Reading and Writing Files)
| | |-- Streams (Byte Streams, Character Streams, Buffered Streams)
| |
| |-- Networking
| | |-- Sockets (TCP and UDP, Socket and ServerSocket Classes)
| | |-- URL and HTTP (URL Class, HttpURLConnection)
| |
| |-- JDBC
| | |-- Database Connectivity (JDBC Drivers, Connection, Statement, and ResultSet)
| | |-- PreparedStatement and CallableStatement
|
|-- Java Frameworks
| |-- Spring Framework
| | |-- Spring Core (Dependency Injection, Inversion of Control)
| | |-- Spring MVC (Model-View-Controller Architecture)
| | |-- Spring Boot (Creating Spring Boot Applications, Starters and Auto-Configuration, Actuator)
| |
| |-- Hibernate
| | |-- ORM Basics (Introduction to ORM, Configuration and Mapping)
| | |-- Advanced Hibernate (Caching, Transactions and Concurrency, Criteria API)
|
|-- Web Development with Java
| |-- Java EE (Jakarta EE)
| | |-- Servlets (Lifecycle, Handling HTTP Requests and Responses, Session Management)
| | |-- JavaServer Pages (JSP) (Syntax, Directives, JSTL and Custom Tags, Expression Language)
| |
| |-- RESTful Web Services
| | |-- JAX-RS (Creating RESTful Services, Annotations and HTTP Methods, Consuming RESTful Services)
|
|-- Build Tools and Dependency Management
| |-- Maven
| | |-- Project Object Model (POM), Dependencies, Repositories, Build Lifecycle and Plugins
| |
| |-- Gradle
| | |-- Build Scripts, Dependency Management, Task Automation
|
|-- Testing in Java
| |-- Unit Testing
| | |-- JUnit (Annotations, Assertions, Test Suites and Runners)
| |
| |-- Mockito (Creating Mocks and Spies and Verification)
| |
| |-- Integration Testing
| | |-- Spring Test (Testing Spring Components and WebTestClient)
|
|-- Deployment and DevOps
| |-- Containers and Microservices
| | |-- Docker (Dockerfile, Image Creation, Container Management)
| | |-- Kubernetes (Pods, Services, Deployments, Managing Java Applications on Kubernetes)
Free books and courses to learn Java๐๐
https://imp.i115008.net/QOz50M
https://bit.ly/3hbu3Dg
https://imp.i115008.net/Jrjo1R
https://bit.ly/3BSHP5S
https://t.me/Java_Programming_Notes
Join @free4unow_backup for more free courses
ENJOY LEARNING๐๐
|
|-- Fundamentals
| |-- Basics of Programming
| | |-- Introduction to Java
| | |-- Java Development Kit (JDK) and Java Runtime Environment (JRE)
| | |-- Setting Up Development Environment (IDE: IntelliJ IDEA, Eclipse, etc.)
| |
| |-- Syntax and Structure
| | |-- Basic Syntax
| | |-- Variables and Data Types
| | |-- Operators and Expressions
|
|-- Control Structures
| |-- Conditional Statements
| | |-- If-Else Statements
| | |-- Switch Case
| |
| |-- Loops
| | |-- For Loop
| | |-- While Loop
| | |-- Do-While Loop
| |
| |-- Exception Handling
| | |-- Try-Catch Block
| | |-- Finally Block
| | |-- Throw and Throws Keywords
|
|-- Object-Oriented Programming (OOP)
| |-- Basics of OOP
| | |-- Classes and Objects
| | |-- Methods and Constructors
| |
| |-- Inheritance
| | |-- Single and Multiple Inheritance
| | |-- Method Overriding
| | |-- Super Keyword
| |
| |-- Polymorphism
| | |-- Method Overloading
| | |-- Runtime Polymorphism
| | |-- Dynamic Method Dispatch
| |
| |-- Encapsulation
| | |-- Access Modifiers (Public, Private, Protected)
| | |-- Getters and Setters
| | |-- Data Hiding
| |
| |-- Abstraction
| | |-- Abstract Classes
| | |-- Interfaces
|
|-- Advanced Java
| |-- Collections Framework
| | |-- List (ArrayList, LinkedList)
| | |-- Set (HashSet, TreeSet)
| | |-- Map (HashMap, TreeMap)
| | |-- Queue (PriorityQueue, LinkedList)
| |
| |-- Concurrency
| | |-- Multithreading (Creating Threads, Thread Lifecycle)
| | |-- Synchronization
| | |-- Concurrency Utilities (Executors Framework, Callable and Future, Locks and Semaphores)
|
|-- Java Standard Libraries
| |-- I/O Streams
| | |-- File Handling (File Class, Reading and Writing Files)
| | |-- Streams (Byte Streams, Character Streams, Buffered Streams)
| |
| |-- Networking
| | |-- Sockets (TCP and UDP, Socket and ServerSocket Classes)
| | |-- URL and HTTP (URL Class, HttpURLConnection)
| |
| |-- JDBC
| | |-- Database Connectivity (JDBC Drivers, Connection, Statement, and ResultSet)
| | |-- PreparedStatement and CallableStatement
|
|-- Java Frameworks
| |-- Spring Framework
| | |-- Spring Core (Dependency Injection, Inversion of Control)
| | |-- Spring MVC (Model-View-Controller Architecture)
| | |-- Spring Boot (Creating Spring Boot Applications, Starters and Auto-Configuration, Actuator)
| |
| |-- Hibernate
| | |-- ORM Basics (Introduction to ORM, Configuration and Mapping)
| | |-- Advanced Hibernate (Caching, Transactions and Concurrency, Criteria API)
|
|-- Web Development with Java
| |-- Java EE (Jakarta EE)
| | |-- Servlets (Lifecycle, Handling HTTP Requests and Responses, Session Management)
| | |-- JavaServer Pages (JSP) (Syntax, Directives, JSTL and Custom Tags, Expression Language)
| |
| |-- RESTful Web Services
| | |-- JAX-RS (Creating RESTful Services, Annotations and HTTP Methods, Consuming RESTful Services)
|
|-- Build Tools and Dependency Management
| |-- Maven
| | |-- Project Object Model (POM), Dependencies, Repositories, Build Lifecycle and Plugins
| |
| |-- Gradle
| | |-- Build Scripts, Dependency Management, Task Automation
|
|-- Testing in Java
| |-- Unit Testing
| | |-- JUnit (Annotations, Assertions, Test Suites and Runners)
| |
| |-- Mockito (Creating Mocks and Spies and Verification)
| |
| |-- Integration Testing
| | |-- Spring Test (Testing Spring Components and WebTestClient)
|
|-- Deployment and DevOps
| |-- Containers and Microservices
| | |-- Docker (Dockerfile, Image Creation, Container Management)
| | |-- Kubernetes (Pods, Services, Deployments, Managing Java Applications on Kubernetes)
Free books and courses to learn Java๐๐
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๐ Roadmap to Become a Java Developer ๐ฐ
๐ Programming Basics
โโ๐ Master Java Syntax, Variables & Data Types
โโโ๐ Learn Control Flow, Loops & Exception Handling
โโโโ๐ Practice with Basic Programs
๐ Object-Oriented Programming (OOP)
โโ๐ Understand Classes, Objects & Inheritance
โโโ๐ Dive into Encapsulation, Polymorphism & Abstraction
โโโโ๐ Explore Design Patterns in Java
๐ Tools & Build Systems
โโ๐ Get Comfortable with IDEs (e.g., IntelliJ, Eclipse)
โโโ๐ Master Maven & Gradle for Dependency Management
โโโโ๐ Learn Git & Version Control Systems
๐ Data Structures & Algorithms
โโ๐ Learn Java Collections (Lists, Sets, Maps, etc.)
โโโ๐ Understand Algorithms & Problem Solving
โโโโ๐ Tackle Coding Challenges
๐ Web Development & APIs
โโ๐ Learn Servlets & JSP Basics
โโโ๐ Dive into Spring Boot & RESTful Services
โโโโ๐ Understand Microservices Architecture
๐ Database & Persistence
โโ๐ Master JDBC & SQL Fundamentals
โโโ๐ Explore ORM Tools like Hibernate & JPA
โโโโ๐ Practice with Real-World Data
๐ Testing & Debugging
โโ๐ Get Started with JUnit & Test-Driven Development
โโโ๐ Learn Debugging Techniques & Best Practices
โโโโ๐ Automate Testing with Tools
๐ Advanced Topics
โโ๐ Learn Multithreading & Concurrency
โโโ๐ Understand JVM Internals & Garbage Collection
โโโโ๐ Explore Performance Optimization
๐ Projects & Real-World Applications
โโ๐ Build End-to-End Java Applications
โโโ๐ Contribute to Open-Source Projects
โโโโ๐ Showcase on GitHub & Portfolio
๐ Interview Preparation & Job Hunting
โโ๐ Solve Java Coding Challenges
โโโ๐ Master System Design & Architecture Concepts
โโโโ๐ Network & Apply for Java Roles
โ ๏ธ Get Hired
React "โค๏ธ" for More ๐จโ๐ป
๐ Programming Basics
โโ๐ Master Java Syntax, Variables & Data Types
โโโ๐ Learn Control Flow, Loops & Exception Handling
โโโโ๐ Practice with Basic Programs
๐ Object-Oriented Programming (OOP)
โโ๐ Understand Classes, Objects & Inheritance
โโโ๐ Dive into Encapsulation, Polymorphism & Abstraction
โโโโ๐ Explore Design Patterns in Java
๐ Tools & Build Systems
โโ๐ Get Comfortable with IDEs (e.g., IntelliJ, Eclipse)
โโโ๐ Master Maven & Gradle for Dependency Management
โโโโ๐ Learn Git & Version Control Systems
๐ Data Structures & Algorithms
โโ๐ Learn Java Collections (Lists, Sets, Maps, etc.)
โโโ๐ Understand Algorithms & Problem Solving
โโโโ๐ Tackle Coding Challenges
๐ Web Development & APIs
โโ๐ Learn Servlets & JSP Basics
โโโ๐ Dive into Spring Boot & RESTful Services
โโโโ๐ Understand Microservices Architecture
๐ Database & Persistence
โโ๐ Master JDBC & SQL Fundamentals
โโโ๐ Explore ORM Tools like Hibernate & JPA
โโโโ๐ Practice with Real-World Data
๐ Testing & Debugging
โโ๐ Get Started with JUnit & Test-Driven Development
โโโ๐ Learn Debugging Techniques & Best Practices
โโโโ๐ Automate Testing with Tools
๐ Advanced Topics
โโ๐ Learn Multithreading & Concurrency
โโโ๐ Understand JVM Internals & Garbage Collection
โโโโ๐ Explore Performance Optimization
๐ Projects & Real-World Applications
โโ๐ Build End-to-End Java Applications
โโโ๐ Contribute to Open-Source Projects
โโโโ๐ Showcase on GitHub & Portfolio
๐ Interview Preparation & Job Hunting
โโ๐ Solve Java Coding Challenges
โโโ๐ Master System Design & Architecture Concepts
โโโโ๐ Network & Apply for Java Roles
โ ๏ธ Get Hired
React "โค๏ธ" for More ๐จโ๐ป
๐4โค2
Six Steps to Defining a Function
1. What should your function do? Type a couple of example calls.
2. Pick a meaningful name (often a verb or verb phrase): What is a short answer to "What does
your function do"?
3. Decide how many parameters the function takes and any return values
4. Describe what your function does and any parameters and return values in the docstring
5. Write the body of the function
6. Test your function. Think about edge cases.
1. What should your function do? Type a couple of example calls.
2. Pick a meaningful name (often a verb or verb phrase): What is a short answer to "What does
your function do"?
3. Decide how many parameters the function takes and any return values
4. Describe what your function does and any parameters and return values in the docstring
5. Write the body of the function
6. Test your function. Think about edge cases.
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Level up your Java skills without getting overwhelmed
All of them are absolutely free, designed by experienced educators and top tech creators
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