Kata Library: Java Practice
Sign Up
Time to claim your honor
Training
Practice
Complete challenging
Kata
to earn honor and ranks. Re-train to hone technique
Freestyle Sparring
Take turns remixing and refactoring others code through
Kumite
Community
Leaderboards
Achieve honor and move up the global leaderboards
Chat
Join our
Discord
server and chat with your fellow code warriors
Discussions
View our
Github Discussions
board to discuss general Codewars topics
About
Docs
Learn about all of the different aspects of Codewars
Blog
Read the latest news from Codewars and the community
Log In
Sign Up
Library
Collections
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Hardest
Easiest
Name
Relevance
Low Satisfaction
All
My Languages
Agda (Beta)
BF (Beta)
C
CFML (Beta)
Clojure
COBOL (Beta)
CoffeeScript
CommonLisp (Beta)
Coq
C++
Crystal
C#
D (Beta)
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy
Haskell
Haxe (Beta)
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin
λ Calculus (Beta)
Lean
Lua
NASM
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
Pascal (Beta)
Perl (Beta)
PHP
PowerShell (Beta)
Prolog (Beta)
PureScript (Beta)
Python
R (Beta)
Racket
Raku (Beta)
Reason (Beta)
RISC-V (Beta)
Ruby
Rust
Scala
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Approved & Beta
Approved
Beta
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
8 kyu
easiest
7 kyu
6 kyu
5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
Algorithms
9
Arrays
5
Dynamic Programming
2
Fundamentals
14
Geometry
1
Lists
1
Mathematics
4
Performance
14
Sorting
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
14 Kata Found
6 kyu
Find the unique number
156,572
isqua
3 Issues Reported
Fundamentals
Algorithms
Arrays
Performance
6 kyu
Not prime numbers
1,558
riyakayal
Fundamentals
Performance
Algorithms
7 kyu
The Poet And The Pendulum
4,868
MrZizoScream
4 Issues Reported
Fundamentals
Arrays
Algorithms
Performance
6 kyu
Triangles made of random points
244
Muchacos
Mathematics
Geometry
Algorithms
Arrays
Performance
Fundamentals
6 kyu
Pentabonacci
2,227
raulbc777
4 Issues Reported
Fundamentals
Mathematics
Algorithms
Performance
Dynamic Programming
7 kyu
Over The Road
16,479
rge123
Fundamentals
Mathematics
Performance
5 kyu
Maximum subarray sum
84,970
knotman90
3 Issues Reported
Algorithms
Lists
Dynamic Programming
Fundamentals
Performance
6 kyu
Simple sum of pairs
1,026
KenKamau
3 Issues Reported
Fundamentals
Performance
6 kyu
Sums of Parts
25,675
g964
Fundamentals
Performance
Algorithms
6 kyu
Find X Ⅱ
224
kodejuice
1 Issue Reported
Fundamentals
Performance
6 kyu
Separate The Wheat From The Chaff
1,765
MrZizoScream
Fundamentals
Arrays
Performance
5 kyu
Infinite continued fractions
53
dolamroth
Mathematics
Fundamentals
Performance
5 kyu
Sports League Table Ranking (with Head-to-head)
39
cshw89
1 Issue Reported
Fundamentals
Algorithms
Arrays
Sorting
Performance
5 kyu
Finding Neo (NC-17)
130
jcsahnwaldt
Fundamentals
Algorithms
Performance
Confirm
Collect:
undefined
Loading collection data...