Reports:Tasks not implemented in Java

Automatically Generated: This result set should be accurate to within fifteen minutes of the last viewing.

Awareness

If Java is a language you like, or are interested in, please inform your fellow members of the Java community; this page can't be emptied without your and their participation.

Not implemented

These are currently not implemented in Java. Please implement some if you can. If any tasks are not possible or too complex in Java, they should not be on this list. To mark a task as such, add {{omit from|Java}}, preserving the capitalization of the language, to that task. It will appear below under the "Not Considered" section.

1

• 15 puzzle solver

A

• Abelian sandpile model
• Amb
• Arena storage pool

B

• Bioinformatics/base count
• Bitcoin/public point to address
• Bitmap/Bézier curves/Cubic
• Bitmap/Bézier curves/Quadratic
• Bitmap/PPM conversion through a pipe
• Bitmap/Read a PPM file
• Bitmap/Read an image through a pipe
• Bitmap/Write a PPM file
• Bitwise IO

C

• Canny edge detector
• Canonicalize CIDR
• Catmull–Clark subdivision surface
• Check output device is a terminal
• Color quantization
• Colour pinstripe/Printer
• Compare sorting algorithms' performance
• Compiler/virtual machine interpreter
• Conjugate transpose

D

• Deconvolution/2D+
• Distributed programming

E

• Elementary cellular automaton/Infinite length
• Elementary cellular automaton/Random Number Generator
• Events

F

• Faces from a mesh
• Factorial base numbers indexing permutations of a collection
• File size distribution
• First class environments
• Fixed length records
• Function frequency
• Functional coverage tree

G

• Gauss-Jordan matrix inversion
• Graph colouring

H

• HTTPS/Authenticated
• HTTPS/Client-authenticated

I

• ISBN13 check digit

J

• Joystick position

K

• K-means++ clustering
• Keyboard input/Flush the keyboard buffer
• Keyboard input/Obtain a Y or N response
• Koch curve

L

• List rooted trees

M

• Machine code
• Main step of GOST 28147-89
• Mastermind
• Matrix Digital Rain
• Median filter
• Metaprogramming
• Mind boggling card trick
• Monads/List monad
• Monads/Maybe monad
• Monads/Writer monad
• Multiple regression

N

• Naming conventions
• Natural sorting
• Nested templated data
• Numerical and alphabetical suffixes

O

• OLE Automation
• OpenWebNet Password
• Ordered Partitions

P

• Peano curve
• Percolation/Bond percolation
• Percolation/Mean cluster density
• Percolation/Mean run density
• Percolation/Site percolation
• Pinstripe/Printer
• Play recorded sounds
• Pragmatic directives

R

• Record sound
• Rendezvous
• Retrieve and search chat history
• Rosetta Code/Find bare lang tags
• Rosetta Code/Find unimplemented tasks

S

• SOAP
• Scope/Function names and labels
• Speech synthesis
• Suffixation of decimal numbers
• Sunflower fractal

T

• Table creation/Postal addresses
• Tarjan
• Terminal control/Coloured text
• Terminal control/Cursor movement
• Terminal control/Cursor positioning
• Terminal control/Dimensions
• Terminal control/Hiding the cursor
• Terminal control/Inverse video
• Terminal control/Positional read
• Terminal control/Unicode output
• Topic variable

V

• Video display modes

---

Draft tasks without implementation

These tasks are drafts, meaning they largely need more work to turn them into full tasks. Perhaps you can help by trying to implement them in Java (after all, one of the key requirements for a task being non-draft is multiple implementations, preferably in widely different languages) but be aware that this may be difficult because of lack of definition of the task itself.

1

• 15 Puzzle Game in 3D
• 16 Puzzle Game

A

• Addition-chain exponentiation
• Audio Overlap Loop
• Audio frequency generator

B

• Banker's algorithm
• Black Box
• Blackjack strategy

C

• CLI-based maze-game
• Checksumcolor
• Chess player
• Combinations with repetitions/Square Digit Chain
• Compiler/Verifying Syntax
• Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N)
• Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2)
• Create DWM statusbar
• Curve that touches three points

D

• Display an outline as a nested table
• Diversity prediction theorem
• Draw pixel 2

E

• Elliptic Curve Digital Signature Algorithm
• Esthetic numbers
• External sort

F

• Fibonacci heap
• Find URI in text
• French Republican calendar

G

• Generalised floating point multiplication
• Geohash
• Gradient descent

H

• Hexapawn

I

• I'm a software engineer, get me out of here
• IPC via named pipe
• IRC gateway
• Interactive Help

L

• Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
• Launch rocket with countdown and acceleration in stdout
• Length of an arc between two angles
• Line circle intersection
• Linux CPU utilization
• Logistic Curve Fitting in Epidemiology
• Long literals, with continuations

M

• Mayan calendar
• Multidimensional Newton-Raphson method
• Multiline shebang
• Musical scale

N

• Names to numbers
• Native shebang

O

• OpenGL/Utah Teapot
• OpenGL Pixel Shader

P

• Parse EBNF
• Parse command-line arguments
• Permutations with some identical elements
• Print itself
• Process SMIL directives in XML data

Q

• Quoting constructs

R

• Raster bars
• Recursive descent parser generator
• Remote agent/Agent interface
• Remote agent/Agent logic
• Remote agent/Simulation
• Resistance Calculator
• Resistance Network Calculator
• Rosetta Code/List authors of task descriptions
• Rosetta Code/Rank languages by number of users
• Rosetta Code/Run examples
• Rosetta Code/Tasks without examples
• Run as a daemon or service

S

• Safe mode
• Self-hosting compiler
• Separate the house number from the street name
• Sierpinski arrowhead curve
• Simulated annealing
• Sine wave
• Singly-linked list/Element removal
• Solve a Rubik's Cube
• Solving coin problems
• Spoof game
• Starting a web browser

T

• Table creation
• Tamagotchi emulator
• Terminal control/Restricted width positional input/No wrapping
• Terminal control/Restricted width positional input/With wrapping
• Text to HTML
• Time-based One-time Password Algorithm
• Tree datastructures

U

• UPC
• URL shortener
• Ukkonen’s Suffix Tree Construction
• Unicode polynomial equation
• Unit testing
• Untrusted environment
• User defined pipe and redirection operators
• Using a Speech engine to highlight words

V

• VList
• Vibrating rectangles
• Vidir

W

• Waveform analysis/Doh ray me
• Waveform analysis/Top and tail
• Weather Routing
• Word wheel

X

• XXXX redacted

---

Requiring Attention

Examples

These tasks have implementations in Java, but somebody, somewhere, decided that the example implementation was faulty or in some other way requiring attention. If you're familiar with the task and language, please consider reviewing/correcting the example and removing the notice.

F

• Find first and last set bit of a long integer

M

• Most frequent k chars distance

R

• Read a file character by character/UTF8

S

• Substring

U

• Using the Meetup.com API

Y

• Yahoo! search interface

---

Other pages

These are other pages related to Java which require attention; with your knowledge and assistance, we can improve the quality of the site's content.

---

Not Considered

These tasks are not generally counted toward "unimplemented", as somebody, somewhere, decided that Java was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

A

• Add a variable to a class instance at runtime

C

• Calendar - for "REAL" programmers
• Check input device is a terminal
• Compile-time calculation
• Create an object at a given address

D

• Dynamic variable names

E

• Extend your language

F

• First-class functions/Use numbers analogously
• Function prototype

H

• Here document

M

• Matrix-exponentiation operator
• Memory layout of a data structure

P

• Pattern matching
• Proof

R

• Respond to an unknown method call
• Runtime evaluation

S

• Shell one-liner
• Start from a main routine

V

• Variable size/Get
• Variable size/Set

---

End of List

Again, feel free to try your hand at any of the tasks listed on this page.