Java Coding Practice Problems

This collection of Java coding practice problems is designed to help you improve your programming skills in Java.

This collection of Java coding practice problems helps improve your programming and problem-solving skills through topic-wise exercises and quizzes. These problems strengthen your understanding of core Java concepts and provide hands-on coding practice for interviews and real-world development.

• Topic-wise coding practice problems and quizzes
• Instant feedback for compiler errors and output mismatches
• Helps improve coding logic and Java programming skills

Basic Java Problems

• Start Coding
• Java Comments
• Print Without Newline
• Print GeeksForGeeks
• Taking Input
• Input Integer
• Arithmetic Operators
• Swap The Numbers

For more problems and coding practices visit Java Fundamentals Coding Practice Problems.

Conditional Statements and Loops Problems

• If Statement
• The Else Statement
• The Else If Statement
• Switch Statement
• For Loop
• While Loop
• Do-While Loop

For more problems and coding practices visit Java Conditional Statements and Loops Coding Problems.

Methods Problems

• Method with Return Type
• Method Without Return Type
• Function wIth Arguments
• First Digit of a Number
• Prime Number Check
• Armstrong Number

For more problems and coding practices visit Java Methods Coding Practice Problems.

Array Problems

• Array Traversal
• Sum of Array Elements
• Find Maximum Element
• Reverse an Array
• Copy Array Elements
• Sort an Array

For more problems and coding practices visit Java Array Coding Practice Problems.

String Problems

• Reverse a String
• Check Palindrome
• Count Vowels
• String Concatenation
• Convert Uppercase to Lowercase
• Find Duplicate Characters

For more problems and coding practices visit Java Strings Coding Practice Problems.

Object-Oriented Programming Problems

• Design a Class
• Constructor
• Overloading
• Overloading
• Inheritance
• Encapsulation
• Abstraction

For more problems and coding practices visit Java OOP Coding Practice Problems.

Collection Framework Problems

• ArrayList Operations
• LinkedList Example
• HashSet Operations
• HashMap Operations
• Stack Operations
• Queue Operations

For more problems and coding practices visit Java Collection Framework Coding Practice Problems.

Java Stream & Lambda Expression

• No Parameter Lambda Expression
• Streams Sum
• Streams Max
• Streams Average

For more problems and coding practices visit Java Stream & Lambda Expression Coding Practice Problems.

Sorting and Searching Algorithms

• Bubble Sort
• Merge Sort
• Binary Array Sorting
• Binary Search Method

For more problems and coding practices visit Java Sorting and Searching Algorithms Coding Practice Problems.

Java Quizzes

• Topic wise Java Quiz