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
6
Arrays
1
Cryptography
1
Data Science
1
Fundamentals
2
Game Solvers
1
Games
11
Geometry
1
Mathematics
11
Matrix
1
Permutations
2
Puzzles
4
Riddles
1
Strings
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
11 Kata Found
Beta
Cross Math
5
antonio.rg
Status:
Testing & feedback needed
Estimated Rank:
4 kyu
Mathematics
Puzzles
Games
2 kyu
6 By 6 Skyscrapers
2,522
FrankK
4 Issues Reported
Mathematics
Puzzles
Games
Arrays
Matrix
Algorithms
8 kyu
Collinearity
10,553
CatPlusPlus
Fundamentals
Geometry
Mathematics
Data Science
Games
4 kyu
Hide a message in a deck of playing cards
272
Zwyx
Cryptography
Mathematics
Games
Permutations
Algorithms
7 kyu
Playing Cards Draw Order – Part 1
1,070
Zwyx
3 Issues Reported
Mathematics
Games
Permutations
7 kyu
21 Sticks
2,153
user2514386
1 Issue Reported
Games
Algorithms
Mathematics
Game Solvers
6 kyu
No one likes carrying change.
476
RasPat1
2 Issues Reported
Mathematics
Games
Algorithms
6 kyu
Bishop Movement checker
514
user7314902
1 Issue Reported
Games
Mathematics
Algorithms
Beta
Price War
3
FilipH
3 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
3 kyu
Fundamentals
Algorithms
Mathematics
Games
Beta
Turn Bus Ticket Digits Into 100
6
ortega89
2 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
2 kyu
Mathematics
Games
Puzzles
5 kyu
Beginners Spy Kit
70
Tandyman
1 Issue Reported
Puzzles
Riddles
Games
Mathematics
Strings
Confirm
Collect:
undefined
Loading collection data...