Java Coding Challenges

Level up your coding skills with real-world Java coding challenges that push you to think smarter and solve problems more efficiently. Each Java Problem is inspired by real development scenarios, giving you meaningful practice that builds confidence and sharpens your logic.

Whether you're preparing for interviews or practicing daily, these Java coding problems let you learn at your own pace and grow into a confident Java programmer with every attempt.

JavaScript

Python

Java

C++

JavaScript

Python

Java

C++

Pick a random java challenge

Solve a problem from a list of 600+ unique problems.

Challenge	Difficulty	XP
Remove Letter To Equalize Frequency	Easy	10
Sum of Prefix Scores of Strings	Hard	30
Best Poker Hand	Easy	10
Count Operations to Obtain Zero	Easy	10
Replace Non-Coprime Numbers in Array	Hard	30
Divide a String Into Groups of Size k	Easy	10
Count Common Words With One Occurrence	Easy	10
Water Bottles	Easy	10
Find Lucky Integer in an Array	Easy	10
Increasing Decreasing String	Easy	10
Shift 2D Grid	Easy	10
Maximum Number of Balloons	Easy	10
Find Words That Can Be Formed by Characters	Easy	10
Distribute Candies to People	Easy	10
Set Intersection Size At Least Two	Hard	30
Number of Visible People in a Queue	Hard	30
Maximum Score of a Good Subarray	Hard	30
Closest Subsequence Sum	Hard	30
Find Servers That Handled Most Number of Requests	Hard	30
Maximum Number of Achievable Transfer Requests	Hard	30

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