Course in Java Skill Tree
Java Programming Exercises
Beginner
Practice Java programming through 200+ hands-on coding challenges. Perfect for beginners to advance their skills with real-world projects covering data structures, algorithms, OOP, and core Java concepts.
java
- Intro
- Syllabus
Accessing Elements in a LinkedList
Accessing Elements of a HashMap
Accessing Static Properties from Another Class
Checking String Equality
Create Linked List with Index
Finding Minimum and Maximum Student Marks
Implement Deque Data Structure
Implementing Lambda Expression with Parameters
Implementing Multilevel Inheritance
Remove Second Element From ArrayList
Sort Players' Ages Ascending Order
Class Methods Retriever Information
Concurrent Execution of Threads
Counting Character Occurrences
Custom Regular Expression
Data Sharing Problem in Ticketing System
Default Methods in Multiple Interfaces
Draw Geometric Shapes
From One-Fourth to 0
Implementing Queue Manually
Lambda Expressions For Data Operations
Matrix element information printing
Remove Duplicate Numbers
Set a price for attractions tickets
Sibling Money Division Game
Simulating a Library
Solving Apple Distribution Problem with Exceptions
Storing Data Information Using HashSet
Sum of Large Numbers
Sum of Three-Digit Number's Digits
The Only God
Usage of Stream
Validating ID Card Number
Simple Java Print Statement
Implement Encryption and Decryption
Access and Modify Student Name
Accessing Overridden Method of Superclass
Accessing Static Properties in a Class
Accessing Superclass Constructor
Adding Elements to ArrayList
Adding Elements to ArrayLists at Specific Index
Area Calculation Program using Abstraction
Calculate BMI Using Weight and Height
Calculate Cube Volume From Side
Calculate Employee Bonus Based Salary
Calculate Interest Based on Principal
Calculate Mean Height of Players
Calculate Percentage with Arrays
Calculate Rectangle Area Using Class
Calculate Rectangle Dimensions
Calculate Sum of Digits
Calculate the Factorial of a Number
Calculating Area of Two Triangles
Calculating Power of a Number
Calculating Standard Deviation in Java
Calculating Sum of Natural Numbers
Calculating the Area of a Circle
Calculating the Area of a Square
Calling a Method Twice
Check Pass, Fail, or Invalid
Checking IcyHot Temperature Using Java
Comparing First and Last Array Elements
Continuously Sum Entered Numbers
Convert Between Kilometers and Miles Using Java
Count the Vowels in a String
Counting Digits In An Integer
Counting Occurrences of Character 'a'
Create a Calculator Program
Creating Enum Class - Size
Creating an Animal-Dog Hierarchy
Determine Factors of a Number
Determine Longer String From Inputs
Determine Maximum Handshakes Among Students
Determine Student Grade
Determining Equality of Two Arguments
Determining Even or Odd
Determining Harshad Number in Java
Determining If a Number is Armstrong
Determining Prime Number Status
Distribute Chocolates To Children
Encapsulating Employee Salary Management
Enum Constants as Strings
Exclude Multiples of Three from Numbers
Fahrenheit to Celsius Conversion Program
Find Differences Between Two Hashsets
Find Intersection of Two HashSets
Find Largest Multiple Less Than 100
Find Smallest Array Element
Find Youngest Brother
Finding Nemo in ArrayList
Finding Prime Numbers in Intervals
Finding the GCD of Two Numbers
Finding the Lowest Common Multiple
FizzBuzz Program: User Input Explanation
Generate Multiplication Table Using Loops
Greatest Factor Excluding Itself
Identify Self-Dividing Numbers
Identifying Abundant Numbers Using Java
Implement Interface to Calculate Square Area
Implementing a Queue Using a LinkedList
Method Overloading for Different Parameters
Method Overloading with Different Parameter Types
Modify Elements in HashMap
Modifying an ArrayList with Java
Multiple Class Method Overriding
Multiple Classes Inheriting a Class
Multiply Array By Ten
Overload Final Method Demonstration
Overriding Parent Class Method
Palindrome Number Check
Perform Complex Number Addition
Pound to Kilogram Conversion Program
Primitive Types to Wrapper Classes
Print Any Type of Data
Print Even Numbers from Array
Print Non-Alphabet Characters
Print Value of Any Data Type
Printing Array Elements
Printing Individual Characters in a String
Printing a Sentence Three Times
Removing Elements from a HashMap
Reverse a Number Program
Shop Profit/Loss Calculator
Simple Interest Calculation Program
String Concatenation: Two Texts Combined
String Conversion: First Letter Uppercase
Subtraction of Coordinates
Swapping Two Numbers with Temp
Valid Internal Angles of Triangle
Validate Leap Year Condition
Verify Prime Number Status Using Java
Verifying Class Instance
Voting Eligibility Determination Program
Airplane Battle Game
Alien Cell Fission
Area of Circle with Any Radius
Automotive Sales Market
Bank Account Program
Blossoms Compete for Beauty
Building and Deploying Spring Boot
Business Card Distribution
Caesar Cipher Encryption
Calculating the Volume of a Cube
Calculating the Volume of a Cylinder
Chat Room Simulation
Class Grade Ranking
Class Properties and Methods
Classify Words by Parts of Speech
Coexisting Chicken and Rabbit Cage
Configuration File Content
Configuring Class Parameters with Annotations
Counting the Occurrences of a Substring
Define Your Annotations
Design and Implementation of Graphic Interface
Design and Implementation of Multiple Interfaces
Determine Spaceship Return Feasibility
Determine Triangle Feasibility with Exception Handling
Dining Philosophers Synchronization
Displaying Data Information Using Iterator
Divide Apples with Exception Handling
Efficient Student Grade Analysis Program
Enter student information
Enum Class for Gender Information
Fibonacci Sequence Programming
File Content Filtering
File Upload Based on UDP Protocol
Flow Control Statements for Multiple Requirements
Fun Code Completion
Get Information from Google Homepage
Handling Incorrect Grades
Hello LabEx Using Java
How Many Days in Each Month
Implement Countdown Timer Thread
Implement a Stock class
Implementing Pascal's Triangle
Implementing String Split
Implementing String Utility Class
Intelligent Care Call Service
Intersection of Linked Lists
Java Engineer Salary Calculation
Kong Rong's Generosity
Landlord Card Game Simulation Using Java
Launching Wayne's Automated Height Calculation
Log Information Classification
Love at First Sight
Maximize Aeroplane Chess Score Using Dynamic Programming
Maximize Airplane Destruction Strategy
Maximum value of three numbers.
Modify Weapon Design Using Inheritance
Narcissistic Number Judgment
Navigating Space Bridge with Java Arrays
No Money Jewelry Store Marketing
Number of Palindromic Numbers
Nüwa Creates Humans
Obtaining Class Objects of Different Classes
Operations with Method References
Optimal Coin Selection for Spring Purchase
Optimizing Threaded Relay Race Simulation
Output a Triangle
Outputting Book Info
Parsing XML Data Information with DOM
Point Inside a Triangle
Producer-Consumer Queue Implementation
Reflectively Create A Person Object
Release Scanner Resource using finally
Rescue Princess with Conditional Execution
Reverse One-Dimensional Array in Java
Reverse Output Word List
Reverse Word Order in English Sentences
Rewriting the equals method
Running Data Alternately In Three Groups
SAX Parsing XML Data
Searching in a Two-Dimensional Array
Servlet User Information Query
Simple Student Management System
Simulated University Management System
Spaceship Speed Control
Spare Me, My Lord
Spiral Traversal of a Tree
Stair Climbing and Balance Prediction
Storing Data Information Using TreeSet
Strength Training with Accumulative Method
String Class Constructors
String Information Statistics
String class methods
Student Management System
Student Score Ranking System
Substring Occurrence Count
Summoning Elves Gameplay
The Magical Pocket
The Wall Has Ears
The Wandering Earth
The Wish of Five Cents
Understanding Constant Pool
User Registration Validation with Exceptions
Using Inheritance to Save Code
When Can I Save Enough Money
Writing Objects to File
Yin and Yang
Teacher
Labby
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