Java
Java
Informazioni su JavaImparaFai pratica

Gestione del track Java

Questa pagina fornisce alla comunità di Exercism le informazioni e gli strumenti necessari per gestire il track Java.

Studenti
286.436
Invii
4.954.440
Discussioni di mentoring
17.800

Il track Java è in salute ✅

In costruzione

Syllabus di Java

Per saperne di più

Aiuta a creare il syllabus del track: è un insieme di concetti ed esercizi di apprendimento messi insieme per insegnare gli elementi fondamentali del linguaggio di programmazione.

Prossimo obiettivo: creare un syllabus completo con almeno 30 concetti. Scopri di più.
27 concetti insegnati
Ba
Basics
62.684 lo hanno imparato
Bo
Booleans
36.368 lo hanno imparato
Ar
Arrays
18.810 lo hanno imparato
Fo
For Loops
18.810 lo hanno imparato
Fo
For-Each Loops
18.810 lo hanno imparato
Ge
Generic Types
13.612 lo hanno imparato
Li
Lists
13.612 lo hanno imparato
Ex
Exceptions
7.076 lo hanno imparato
Ch
Chars
11.940 lo hanno imparato
Cl
Classes
12.882 lo hanno imparato
Co
Constructors
9.423 lo hanno imparato
In
Interfaces
6.984 lo hanno imparato
If
If-Else Statements
19.110 lo hanno imparato
Nu
Numbers
19.110 lo hanno imparato
St
Strings
24.028 lo hanno imparato
Te
Ternary Operators
11.254 lo hanno imparato
Sw
Switch Statements
8.139 lo hanno imparato
In
Inheritance
7.345 lo hanno imparato
En
Enums
4.391 lo hanno imparato
Nu
Nullability
7.849 lo hanno imparato
Ra
Randomness
5.107 lo hanno imparato
Da
Date-Time
5.295 lo hanno imparato
Me
Method Overloading
3.655 lo hanno imparato
Bi
Bit Manipulation
4.698 lo hanno imparato
Se
Sets
3.577 lo hanno imparato
Ma
Maps
2.713 lo hanno imparato
Te
Temporal Adjusters
44 lo hanno imparato
23 esercizi di apprendimento attivi
Iniziati
Tentativi
Completamenti
Richieste di mentoring
Cook Your Lasagna Cook Your Lasagna
103.449
564.545 (media 5.5)
62.684 (60.6%)
497 (0.5%)
Annalyn's Infiltration Annalyn's Infiltration
48.917
451.094 (media 9.2)
36.368 (74.3%)
315 (0.6%)
Bird Watcher Bird Watcher
22.951
310.729 (media 13.5)
18.810 (82.0%)
488 (2.1%)
Karl's Languages Karl's Languages
15.192
85.703 (media 5.6)
13.612 (89.6%)
118 (0.8%)
Calculator Conundrum Calculator Conundrum
8.684
114.164 (media 13.1)
7.076 (81.5%)
118 (1.4%)
Squeaky Clean Squeaky Clean
17.664
256.040 (media 14.5)
11.940 (67.6%)
500 (2.8%)
Jedlik's Toy Car Jedlik's Toy Car
14.143
121.464 (media 8.6)
12.882 (91.1%)
157 (1.1%)
Need for Speed Need for Speed
10.841
133.491 (media 12.3)
9.423 (86.9%)
80 (0.7%)
Remote Control Competition Remote Control Competition
8.792
92.469 (media 10.5)
6.984 (79.4%)
105 (1.2%)
Cars, Assemble! Cars, Assemble!
21.296
156.934 (media 7.4)
19.110 (89.7%)
426 (2.0%)
Log Levels Log Levels
36.676
324.277 (media 8.8)
24.028 (65.5%)
303 (0.8%)
Salary Calculator Salary Calculator
12.143
71.122 (media 5.9)
11.254 (92.7%)
43 (0.4%)
Football Match Reports Football Match Reports
8.448
34.750 (media 4.1)
8.139 (96.3%)
58 (0.7%)
Wizards and Warriors Wizards and Warriors
8.082
59.304 (media 7.3)
7.345 (90.9%)
39 (0.5%)
Logs, Logs, Logs! Logs, Logs, Logs!
5.147
51.758 (media 10.1)
4.391 (85.3%)
62 (1.2%)
Tim from Marketing Tim from Marketing
8.317
54.606 (media 6.6)
7.849 (94.4%)
66 (0.8%)
Captain's Log Captain's Log
5.431
33.550 (media 6.2)
5.107 (94.0%)
21 (0.4%)
Booking Up For Beauty Booking Up For Beauty
6.402
84.494 (media 13.2)
5.295 (82.7%)
53 (0.8%)
Wizards and Warriors 2 Wizards and Warriors 2
4.020
34.961 (media 8.7)
3.655 (90.9%)
21 (0.5%)
Secrets Secrets
5.395
29.117 (media 5.4)
4.698 (87.1%)
7 (0.1%)
Gotta Snatch 'Em All Gotta Snatch 'Em All
4.153
49.353 (media 11.9)
3.577 (86.1%)
58 (1.4%)
International Calling Connoisseur International Calling Connoisseur
3.163
33.916 (media 10.7)
2.713 (85.8%)
33 (1.0%)
Beauty Salon Regulars Beauty Salon Regulars
67
621 (media 9.3)
44 (65.7%)
1 (1.5%)
1 esercizi di apprendimento deprecati
Iniziati
Tentativi
Completamenti
Richieste di mentoring
Play Your Cards! Play Your Cards!
8.676
85.974 (media 9.9)
6.859 (79.1%)
121 (1.4%)

Esercizi di pratica

Scopri di più

Gli esercizi di pratica sono esercizi progettati per permettere agli studenti di risolvere un problema arbitrario, con l'obiettivo di utilizzare i concetti che hanno imparato finora.

Repo principale sincronizzato: be2d006c30c50e0154231dd987d5a3b5526c0427 (Gli aggiornamenti dovrebbero essere immediati)

Prossimo obiettivo: implementare 140 esercizi di pratica. Scopri di più.
136 esercizi di pratica attivi
Iniziati
Tentativi
Completamenti
Richieste di mentoring
Hello World Hello World
225.609
456.736 (media 2.0)
138.461 (61.4%)
40 (0.0%)
Leap Leap
8.691
32.996 (media 3.8)
7.044 (81.0%)
119 (1.4%)
Reverse String Reverse String
16.298
49.211 (media 3.0)
13.633 (83.6%)
331 (2.0%)
Two Fer Two Fer
24.480
78.602 (media 3.2)
19.530 (79.8%)
3.929 (16.0%)
Armstrong Numbers Armstrong Numbers
7.787
27.705 (media 3.6)
6.258 (80.4%)
151 (1.9%)
Darts Darts
7.755
26.992 (media 3.5)
6.138 (79.1%)
67 (0.9%)
D&D Character D&D Character
5.231
43.721 (media 8.4)
3.712 (71.0%)
78 (1.5%)
DOT DSL DOT DSL
1.766
8.204 (media 4.6)
1.108 (62.7%)
9 (0.5%)
Grains Grains
5.232
41.084 (media 7.9)
4.252 (81.3%)
55 (1.1%)
High Scores High Scores
2.983
23.601 (media 7.9)
2.388 (80.1%)
38 (1.3%)
Resistor Color Resistor Color
6.940
26.264 (media 3.8)
5.632 (81.2%)
74 (1.1%)
Resistor Color Duo Resistor Color Duo
4.942
16.448 (media 3.3)
4.202 (85.0%)
47 (1.0%)
Resistor Color Trio Resistor Color Trio
1.928
21.501 (media 11.2)
1.643 (85.2%)
40 (2.1%)
RNA Transcription RNA Transcription
6.992
18.612 (media 2.7)
5.927 (84.8%)
243 (3.5%)
Acronym Acronym
4.955
21.891 (media 4.4)
3.984 (80.4%)
99 (2.0%)
Difference of Squares Difference of Squares
7.252
24.577 (media 3.4)
6.364 (87.8%)
711 (9.8%)
Gigasecond Gigasecond
8.827
21.071 (media 2.4)
6.379 (72.3%)
1.345 (15.2%)
Hamming Hamming
8.848
33.473 (media 3.8)
7.310 (82.6%)
1.495 (16.9%)
Micro Blog Micro Blog
7.051
39.530 (media 5.6)
4.361 (61.8%)
104 (1.5%)
Pangram Pangram
5.779
15.851 (media 2.7)
4.832 (83.6%)
173 (3.0%)
Perfect Numbers Perfect Numbers
3.806
14.741 (media 3.9)
2.713 (71.3%)
54 (1.4%)
Eliud's Eggs Eliud's Eggs
1.440
4.663 (media 3.2)
1.296 (90.0%)
17 (1.2%)
Protein Translation Protein Translation
3.917
20.581 (media 5.3)
3.097 (79.1%)
62 (1.6%)
Raindrops Raindrops
8.557
22.798 (media 2.7)
7.239 (84.6%)
258 (3.0%)
Say Say
2.956
20.006 (media 6.8)
1.374 (46.5%)
42 (1.4%)
Scrabble Score Scrabble Score
6.485
23.662 (media 3.6)
5.484 (84.6%)
1.085 (16.7%)
Secret Handshake Secret Handshake
4.407
22.142 (media 5.0)
3.400 (77.1%)
468 (10.6%)
Space Age Space Age
4.776
11.124 (media 2.3)
3.696 (77.4%)
65 (1.4%)
Collatz Conjecture Collatz Conjecture
2.433
9.718 (media 4.0)
2.008 (82.5%)
38 (1.6%)
Diamond Diamond
3.047
16.341 (media 5.4)
2.018 (66.2%)
57 (1.9%)
Error Handling Error Handling
2.136
15.298 (media 7.2)
1.250 (58.5%)
7 (0.3%)
ISBN Verifier ISBN Verifier
2.941
14.543 (media 4.9)
2.319 (78.9%)
44 (1.5%)
Isogram Isogram
5.383
20.649 (media 3.8)
4.367 (81.1%)
172 (3.2%)
Killer Sudoku Helper Killer Sudoku Helper
931
4.999 (media 5.4)
513 (55.1%)
18 (1.9%)
Kindergarten Garden Kindergarten Garden
1.462
5.176 (media 3.5)
1.088 (74.4%)
13 (0.9%)
Largest Series Product Largest Series Product
2.126
13.227 (media 6.2)
1.682 (79.1%)
23 (1.1%)
Luhn Luhn
2.815
14.052 (media 5.0)
2.198 (78.1%)
51 (1.8%)
Matrix Matrix
3.465
17.967 (media 5.2)
2.606 (75.2%)
314 (9.1%)
Nth Prime Nth Prime
1.644
6.427 (media 3.9)
1.285 (78.2%)
22 (1.3%)
Prism Prism
165
1.162 (media 7.0)
77 (46.7%)
1 (0.6%)
Proverb Proverb
3.005
8.953 (media 3.0)
2.441 (81.2%)
34 (1.1%)
Rate Limiter Rate Limiter
332
1.450 (media 4.4)
181 (54.5%)
5 (1.5%)
Rotational Cipher Rotational Cipher
2.606
13.151 (media 5.0)
2.186 (83.9%)
226 (8.7%)
Saddle Points Saddle Points
1.961
8.965 (media 4.6)
1.342 (68.4%)
161 (8.2%)
Sieve Sieve
1.620
4.737 (media 2.9)
1.285 (79.3%)
25 (1.5%)
Split-Second Stopwatch Split-Second Stopwatch
237
1.955 (media 8.2)
156 (65.8%)
0 (0.0%)
Sum of Multiples Sum of Multiples
2.224
8.099 (media 3.6)
1.639 (73.7%)
40 (1.8%)
Swift Scheduling Swift Scheduling
214
1.991 (media 9.3)
147 (68.7%)
1 (0.5%)
Triangle Triangle
3.063
12.438 (media 4.1)
2.601 (84.9%)
262 (8.6%)
Twelve Days Twelve Days
2.846
15.695 (media 5.5)
2.142 (75.3%)
33 (1.2%)
Variable Length Quantity Variable Length Quantity
770
3.083 (media 4.0)
404 (52.5%)
2 (0.3%)
Yacht Yacht
1.700
8.304 (media 4.9)
1.130 (66.5%)
31 (1.8%)
Allergies Allergies
1.452
5.148 (media 3.5)
1.095 (75.4%)
25 (1.7%)
Atbash Cipher Atbash Cipher
917
5.110 (media 5.6)
729 (79.5%)
9 (1.0%)
Bob Bob
2.301
14.162 (media 6.2)
1.862 (80.9%)
62 (2.7%)
Flatten Array Flatten Array
1.882
8.369 (media 4.4)
1.400 (74.4%)
137 (7.3%)
Conway's Game of Life Conway's Game of Life
510
2.377 (media 4.7)
322 (63.1%)
2 (0.4%)
Grep Grep
789
3.993 (media 5.1)
435 (55.1%)
7 (0.9%)
Knapsack Knapsack
1.032
4.768 (media 4.6)
611 (59.2%)
10 (1.0%)
Ledger Ledger
463
3.267 (media 7.1)
255 (55.1%)
9 (1.9%)
Matching Brackets Matching Brackets
913
3.494 (media 3.8)
655 (71.7%)
11 (1.2%)
Nucleotide Count Nucleotide Count
2.240
6.720 (media 3.0)
1.988 (88.8%)
91 (4.1%)
Pascal's Triangle Pascal's Triangle
892
2.462 (media 2.8)
636 (71.3%)
5 (0.6%)
Phone Number Phone Number
1.621
9.429 (media 5.8)
1.232 (76.0%)
26 (1.6%)
Pig Latin Pig Latin
2.774
12.274 (media 4.4)
1.553 (56.0%)
76 (2.7%)
Prime Factors Prime Factors
966
2.926 (media 3.0)
738 (76.4%)
11 (1.1%)
Relative Distance Relative Distance
991
5.975 (media 6.0)
428 (43.2%)
9 (0.9%)
Robot Name Robot Name
1.922
10.788 (media 5.6)
1.564 (81.4%)
139 (7.2%)
Run-Length Encoding Run-Length Encoding
724
3.161 (media 4.4)
516 (71.3%)
9 (1.2%)
Series Series
1.085
3.293 (media 3.0)
887 (81.8%)
11 (1.0%)
Square Root Square Root
641
1.929 (media 3.0)
506 (78.9%)
9 (1.4%)
Word Count Word Count
2.980
17.348 (media 5.8)
2.265 (76.0%)
213 (7.1%)
State Of Tic Tac Toe State Of Tic Tac Toe
384
2.602 (media 6.8)
230 (59.9%)
6 (1.6%)
Affine Cipher Affine Cipher
425
3.164 (media 7.4)
278 (65.4%)
4 (0.9%)
All Your Base All Your Base
573
2.942 (media 5.1)
390 (68.1%)
2 (0.3%)
Alphametics Alphametics
611
2.660 (media 4.4)
251 (41.1%)
3 (0.5%)
Baffling Birthdays Baffling Birthdays
95
425 (media 4.5)
57 (60.0%)
0 (0.0%)
Bank Account Bank Account
1.759
9.617 (media 5.5)
1.205 (68.5%)
96 (5.5%)
Binary Search Binary Search
1.422
7.844 (media 5.5)
1.071 (75.3%)
94 (6.6%)
Bottle Song Bottle Song
871
7.752 (media 8.9)
549 (63.0%)
19 (2.2%)
Bowling Bowling
1.026
8.287 (media 8.1)
442 (43.1%)
11 (1.1%)
Camicia Camicia
47
354 (media 7.5)
27 (57.4%)
0 (0.0%)
ETL ETL
1.878
2.958 (media 1.6)
1.690 (90.0%)
128 (6.8%)
Flower Field Flower Field
119
494 (media 4.2)
81 (68.1%)
0 (0.0%)
Food Chain Food Chain
938
3.563 (media 3.8)
629 (67.1%)
11 (1.2%)
Grade School Grade School
908
3.133 (media 3.5)
650 (71.6%)
22 (2.4%)
House House
1.006
3.766 (media 3.7)
720 (71.6%)
10 (1.0%)
Intergalactic Transmission Intergalactic Transmission
984
1.903 (media 1.9)
108 (11.0%)
5 (0.5%)
Linked List Linked List
1.475
6.380 (media 4.3)
1.040 (70.5%)
78 (5.3%)
Parallel Letter Frequency Parallel Letter Frequency
800
3.712 (media 4.6)
494 (61.8%)
13 (1.6%)
Piecing It Together Piecing It Together
84
763 (media 9.1)
44 (52.4%)
0 (0.0%)
Queen Attack Queen Attack
2.076
7.877 (media 3.8)
778 (37.5%)
34 (1.6%)
Rail Fence Cipher Rail Fence Cipher
403
1.568 (media 3.9)
243 (60.3%)
1 (0.2%)
REST API REST API
803
4.452 (media 5.5)
203 (25.3%)
5 (0.6%)
Robot Simulator Robot Simulator
868
2.772 (media 3.2)
548 (63.1%)
10 (1.2%)
Roman Numerals Roman Numerals
1.229
3.794 (media 3.1)
896 (72.9%)
15 (1.2%)
Spiral Matrix Spiral Matrix
637
1.618 (media 2.5)
400 (62.8%)
6 (0.9%)
Tournament Tournament
799
4.024 (media 5.0)
406 (50.8%)
10 (1.3%)
Transpose Transpose
582
3.027 (media 5.2)
319 (54.8%)
2 (0.3%)
Wordy Wordy
611
2.845 (media 4.7)
359 (58.8%)
6 (1.0%)
Anagram Anagram
3.209
10.564 (media 3.3)
2.308 (71.9%)
114 (3.6%)
Binary Search Tree Binary Search Tree
695
2.987 (media 4.3)
390 (56.1%)
9 (1.3%)
Clock Clock
584
2.467 (media 4.2)
388 (66.4%)
3 (0.5%)
Crypto Square Crypto Square
472
1.922 (media 4.1)
318 (67.4%)
3 (0.6%)
Dominoes Dominoes
1.100
3.218 (media 2.9)
293 (26.6%)
9 (0.8%)
Go Counting Go Counting
515
1.503 (media 2.9)
191 (37.1%)
0 (0.0%)
Markdown Markdown
958
2.243 (media 2.3)
397 (41.4%)
14 (1.5%)
Meetup Meetup
917
2.450 (media 2.7)
710 (77.4%)
13 (1.4%)
Poker Poker
783
2.706 (media 3.5)
238 (30.4%)
6 (0.8%)
SGF Parsing SGF Parsing
157
1.948 (media 12.4)
88 (56.1%)
2 (1.3%)
Simple Linked List Simple Linked List
791
4.076 (media 5.2)
472 (59.7%)
10 (1.3%)
Sublist Sublist
520
1.846 (media 3.6)
332 (63.8%)
0 (0.0%)
Tree Building Tree Building
352
846 (media 2.4)
161 (45.7%)
3 (0.9%)
Two Bucket Two Bucket
410
1.187 (media 2.9)
181 (44.1%)
3 (0.7%)
Word Search Word Search
899
2.608 (media 2.9)
286 (31.8%)
5 (0.6%)
Zebra Puzzle Zebra Puzzle
3.239
2.927 (media 0.9)
532 (16.4%)
13 (0.4%)
Zipper Zipper
334
973 (media 2.9)
148 (44.3%)
0 (0.0%)
Book Store Book Store
680
2.343 (media 3.4)
238 (35.0%)
6 (0.9%)
Change Change
581
3.407 (media 5.9)
243 (41.8%)
4 (0.7%)
Circular Buffer Circular Buffer
619
2.460 (media 4.0)
378 (61.1%)
5 (0.8%)
Complex Numbers Complex Numbers
670
2.318 (media 3.5)
418 (62.4%)
11 (1.6%)
Connect Connect
360
1.806 (media 5.0)
188 (52.2%)
7 (1.9%)
Hangman Hangman
381
1.130 (media 3.0)
102 (26.8%)
6 (1.6%)
List Ops List Ops
569
2.380 (media 4.2)
305 (53.6%)
10 (1.8%)
Mazy Mice Mazy Mice
158
718 (media 4.5)
72 (45.6%)
4 (2.5%)
OCR Numbers OCR Numbers
395
842 (media 2.1)
211 (53.4%)
3 (0.8%)
Palindrome Products Palindrome Products
485
1.492 (media 3.1)
258 (53.2%)
5 (1.0%)
POV POV
173
781 (media 4.5)
83 (48.0%)
1 (0.6%)
Rational Numbers Rational Numbers
531
3.396 (media 6.4)
285 (53.7%)
6 (1.1%)
React React
282
1.140 (media 4.0)
91 (32.3%)
2 (0.7%)
Rectangles Rectangles
376
898 (media 2.4)
190 (50.5%)
4 (1.1%)
Simple Cipher Simple Cipher
539
1.820 (media 3.4)
349 (64.7%)
7 (1.3%)
Forth Forth
531
1.891 (media 3.6)
217 (40.9%)
13 (2.4%)
Pythagorean Triplet Pythagorean Triplet
1.090
6.725 (media 6.2)
474 (43.5%)
7 (0.6%)
Custom Set Custom Set
606
2.130 (media 3.5)
273 (45.0%)
5 (0.8%)
Satellite Satellite
537
1.143 (media 2.1)
182 (33.9%)
4 (0.7%)
9 esercizi di pratica deprecati
Iniziati
Tentativi
Completamenti
Richieste di mentoring
Accumulate Accumulate
110
138 (media 1.3)
107 (97.3%)
5 (4.5%)
Beer Song Beer Song
867
3.388 (media 3.9)
664 (76.6%)
15 (1.7%)
Binary Binary
136
181 (media 1.3)
134 (98.5%)
6 (4.4%)
Diffie-Hellman Diffie-Hellman
228
327 (media 1.4)
117 (51.3%)
2 (0.9%)
Hexadecimal Hexadecimal
58
74 (media 1.3)
56 (96.6%)
7 (12.1%)
Minesweeper Minesweeper
795
2.853 (media 3.6)
519 (65.3%)
9 (1.1%)
Octal Octal
59
70 (media 1.2)
57 (96.6%)
2 (3.4%)
Strain Strain
111
141 (media 1.3)
108 (97.3%)
5 (4.5%)
Trinary Trinary
71
85 (media 1.2)
69 (97.2%)
1 (1.4%)
4 esercizi di pratica non implementati
Line Up Line Up
Visualizza i datiIl link si apre in una nuova finestra o scheda
PaaS I/O PaaS I/O
Visualizza i datiIl link si apre in una nuova finestra o scheda
Resistor Color Tolerance Resistor Color Tolerance
Visualizza i datiIl link si apre in una nuova finestra o scheda
Save the Cow Save the Cow
Visualizza i datiIl link si apre in una nuova finestra o scheda
1 esercizio di pratica accantonato
Lens Person Lens Person
Visualizza i datiIl link si apre in una nuova finestra o scheda

Test Runner

Scopri di più

Crea Test Runner che abbiano l'unica responsabilità di prendere una soluzione, eseguire tutti i test e restituire un output standardizzato.

Versione attuale: 3f0677266bdae1fa5828cde474d4d65e57f4d967 (Il rilascio richiede fino a 10 minuti)

Esecuzioni totali dei Test Runner
4.867.752
Percentuale di esecuzioni di test superate
17.3% (841623)
Percentuale di esecuzioni di test fallite
38.1% (1855840)
Percentuale di esecuzioni di test con errori
44.6% (2170289)

Representer

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Costruisci un Representer: un po' di codice che ha la sola responsabilità di prendere una soluzione e restituirne una rappresentazione normalizzata.

Versione attuale: 0dacac5bc7ce92d4a2612ffa8eb4c7eac24d3219 (Il rilascio può richiedere fino a 10 minuti)

Esecuzioni totali del Representer
957.905
Totale commenti sulle rappresentazioni
112.199
Frequenza del feedback fornito
11.7%

Analizzatore

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Crea un analizzatore per Java: gli analizzatori di Exercism valutano automaticamente le soluzioni degli studenti e forniscono commenti in stile mentore.

Versione attuale: 1a09c2c7f5539c77344519ba8a7b6561ad51adde (Richiede fino a 10 minuti per il rilascio)

Esecuzioni totali dell'analizzatore
673.170
Commenti di analisi totali
436.098
Frequenza del feedback fornito
4.3%