Java Programming Exercises

Easy Sum of Two Numbers Sum Multiples of Three and Five Factorial Linear Search Reverse String Find Maximum Average Value (Java 8 Lambdas and Streams) Convert to Upper Case (Java 8 Lambdas and Streams) Nth Odd Element Number Of Tree Nodes Count Nodes in List Count Number of Leaf Nodes Binary Tree Depth Find Second Largest Number in Array
Moderate Fizz Buzz Prime Number Fibonacci Number Palindrome Check Even Fibonacci Sum Greatest Common Divisor Package Rice Bags Filter Strings (Java 8 Lambdas and Streams) Comma Separated (Java 8 Lambdas and Streams) Ceasar Cipher Strict Binary Tree Check Two Sum (Pair with a Given Sum)
Challenging Longest Palindrome in Word Longest Common Sequence Largest Prime Factor Package Rice Bags (part 2) Perfect Binary Tree Check Complete Binary Tree Check

About

    I created this website to help developers improve their programming skills by practising simple coding exercises. The target audience is Software Engineers, Test Automation Engineers, or anyone curious about computer programming. The primary programming language is Java, as it is mature and easy to learn, but you can practice the same problems in any other language (Kotlin, Python, Javascript, etc.).

Highlights

How does it work ?

1. Choose difficulty

Easy, moderate or challenging.

2. Choose the exercise

From a list of coding exercises commonly found in interviews.

3. Type in your code

No IDE, no auto-correct... just like the whiteboard interview question.

4. Check results

Typically 3-5 unit tests that verify your code.

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