lots of exercises in java... from https://github.com/exercism/java

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  1. {
  2. "active": true,
  3. "blurb": "Java is a very widely used Object Oriented programming language. It's safe, simple to use and portable so that you can \"write once, run anywhere\".",
  4. "exercises": [
  5. {
  6. "core": true,
  7. "difficulty": 1,
  8. "slug": "hello-world",
  9. "topics": [
  10. "strings"
  11. ],
  12. "unlocked_by": null,
  13. "uuid": "f77dc7e3-35a8-4300-a7c8-2c1765e9644d"
  14. },
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  17. "difficulty": 1,
  18. "slug": "two-fer",
  19. "topics": [
  20. "conditionals",
  21. "strings"
  22. ],
  23. "unlocked_by": null,
  24. "uuid": "74515d45-565b-4be2-96c4-77e58efa9257"
  25. },
  26. {
  27. "core": false,
  28. "difficulty": 2,
  29. "slug": "rna-transcription",
  30. "topics": [
  31. "loops",
  32. "maps",
  33. "strings"
  34. ],
  35. "unlocked_by": null,
  36. "uuid": "8e983ed2-62f7-439a-a144-fb8fdbdf4d30"
  37. },
  38. {
  39. "core": false,
  40. "difficulty": 3,
  41. "slug": "pangram",
  42. "topics": [
  43. "pattern_matching",
  44. "regular_expressions",
  45. "strings"
  46. ],
  47. "unlocked_by": null,
  48. "uuid": "133b0f84-bdc7-4508-a0a1-5732a7db81ef"
  49. },
  50. {
  51. "core": true,
  52. "difficulty": 3,
  53. "slug": "hamming",
  54. "topics": [
  55. "integers",
  56. "loops",
  57. "strings"
  58. ],
  59. "unlocked_by": null,
  60. "uuid": "ce899ca6-9cc7-47ba-b76f-1bbcf2630b76"
  61. },
  62. {
  63. "core": true,
  64. "difficulty": 3,
  65. "slug": "gigasecond",
  66. "topics": [
  67. "dates",
  68. "integers",
  69. "time"
  70. ],
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  77. "slug": "space-age",
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  80. "floating_point_numbers",
  81. "mathematics"
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  85. },
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  88. "difficulty": 3,
  89. "slug": "acronym",
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  92. "parsing",
  93. "searching",
  94. "strings"
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  106. "pattern_matching",
  107. "strings",
  108. "transforming"
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  120. "mathematics",
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  128. "difficulty": 3,
  129. "slug": "difference-of-squares",
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  137. },
  138. {
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  140. "difficulty": 3,
  141. "slug": "secret-handshake",
  142. "topics": [
  143. "bitwise_operations",
  144. "conditionals",
  145. "cryptography",
  146. "enumerations",
  147. "integers",
  148. "loops",
  149. "mathematics",
  150. "transforming"
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  154. },
  155. {
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  158. "slug": "perfect-numbers",
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  162. "filtering",
  163. "integers",
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  172. "slug": "protein-translation",
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  177. "strings"
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  181. },
  182. {
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  184. "difficulty": 4,
  185. "slug": "isbn-verifier",
  186. "topics": [
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  188. "loops",
  189. "strings"
  190. ],
  191. "unlocked_by": "hamming",
  192. "uuid": "838bc1d7-b2de-482a-9bfc-c881b4ccb04c"
  193. },
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  196. "difficulty": 4,
  197. "slug": "sum-of-multiples",
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  200. "conditionals",
  201. "integers",
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  203. "mathematics"
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  211. "slug": "luhn",
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  214. "booleans",
  215. "loops",
  216. "mathematics",
  217. "strings",
  218. "type_conversion"
  219. ],
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  222. },
  223. {
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  225. "difficulty": 4,
  226. "slug": "matrix",
  227. "topics": [
  228. "arrays",
  229. "integers",
  230. "loops",
  231. "pattern_matching",
  232. "strings",
  233. "type_conversion"
  234. ],
  235. "unlocked_by": null,
  236. "uuid": "c1d4e0b4-6a0f-4be9-8222-345966621f53"
  237. },
  238. {
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  240. "difficulty": 4,
  241. "slug": "triangle",
  242. "topics": [
  243. "booleans",
  244. "classes",
  245. "exception_handling",
  246. "mathematics"
  247. ],
  248. "unlocked_by": null,
  249. "uuid": "ec268d8e-997b-4553-8c67-8bdfa1ecb888"
  250. },
  251. {
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  253. "difficulty": 4,
  254. "slug": "largest-series-product",
  255. "topics": [
  256. "integers",
  257. "loops",
  258. "mathematics",
  259. "strings",
  260. "type_conversion"
  261. ],
  262. "unlocked_by": "hamming",
  263. "uuid": "b7310b6e-435c-4d5f-b2bd-31e586d0f238"
  264. },
  265. {
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  267. "difficulty": 4,
  268. "slug": "sieve",
  269. "topics": [
  270. "algorithms",
  271. "integers",
  272. "lists",
  273. "loops",
  274. "mathematics"
  275. ],
  276. "unlocked_by": "difference-of-squares",
  277. "uuid": "6791d01f-bae4-4b63-ae76-86529ac49e36"
  278. },
  279. {
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  281. "difficulty": 4,
  282. "slug": "twelve-days",
  283. "topics": [
  284. "arrays",
  285. "conditionals",
  286. "loops",
  287. "strings"
  288. ],
  289. "unlocked_by": "two-fer",
  290. "uuid": "581afdbb-dfb6-4dc5-9554-a025b5469a3c"
  291. },
  292. {
  293. "core": true,
  294. "difficulty": 4,
  295. "slug": "rotational-cipher",
  296. "topics": [
  297. "cryptography",
  298. "integers",
  299. "strings"
  300. ],
  301. "unlocked_by": null,
  302. "uuid": "9eb41883-55ef-4681-b5ac-5c2259302772"
  303. },
  304. {
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  306. "difficulty": 4,
  307. "slug": "kindergarten-garden",
  308. "topics": [
  309. "arrays",
  310. "enumerations",
  311. "lists",
  312. "logic",
  313. "loops",
  314. "pattern_recognition",
  315. "strings"
  316. ],
  317. "unlocked_by": "matrix",
  318. "uuid": "0b92ffee-c092-4ab1-ad78-76c8cf80e1b5"
  319. },
  320. {
  321. "core": false,
  322. "difficulty": 4,
  323. "slug": "collatz-conjecture",
  324. "topics": [
  325. "conditionals",
  326. "exception_handling",
  327. "integers",
  328. "mathematics",
  329. "recursion"
  330. ],
  331. "unlocked_by": "triangle",
  332. "uuid": "1500d39a-c9d9-4d3a-9e77-fdc1837fc6ad"
  333. },
  334. {
  335. "core": false,
  336. "difficulty": 4,
  337. "slug": "nth-prime",
  338. "topics": [
  339. "arrays",
  340. "exception_handling",
  341. "integers",
  342. "lists",
  343. "loops"
  344. ],
  345. "unlocked_by": "triangle",
  346. "uuid": "2c69db99-648d-4bd7-8012-1fbdeff6ca0a"
  347. },
  348. {
  349. "core": true,
  350. "difficulty": 4,
  351. "slug": "saddle-points",
  352. "topics": [
  353. "arrays",
  354. "conditionals",
  355. "integers",
  356. "lists",
  357. "loops",
  358. "mathematics",
  359. "matrices",
  360. "sets"
  361. ],
  362. "unlocked_by": null,
  363. "uuid": "8dfc2f0d-1141-46e9-95e2-6f35ccf6f160"
  364. },
  365. {
  366. "core": false,
  367. "difficulty": 4,
  368. "slug": "diamond",
  369. "topics": [
  370. "arrays",
  371. "lists",
  372. "loops",
  373. "strings",
  374. "text_formatting"
  375. ],
  376. "unlocked_by": "two-fer",
  377. "uuid": "ecbd997b-86f4-4e11-9ff0-706ac2899415"
  378. },
  379. {
  380. "core": false,
  381. "difficulty": 4,
  382. "slug": "isogram",
  383. "topics": [
  384. "conditionals",
  385. "loops",
  386. "parsing",
  387. "strings"
  388. ],
  389. "unlocked_by": "hello-world",
  390. "uuid": "c3e89c7c-3a8a-4ddc-b653-9b0ff9e1d7d8"
  391. },
  392. {
  393. "core": true,
  394. "difficulty": 5,
  395. "slug": "flatten-array",
  396. "topics": [
  397. "arrays",
  398. "lists",
  399. "loops",
  400. "recursion"
  401. ],
  402. "unlocked_by": null,
  403. "uuid": "a732a838-8170-458a-a85e-d6b4c46f97a1"
  404. },
  405. {
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  407. "difficulty": 5,
  408. "slug": "pig-latin",
  409. "topics": [
  410. "arrays",
  411. "lists",
  412. "strings",
  413. "transforming"
  414. ],
  415. "unlocked_by": "hello-world",
  416. "uuid": "38bc80ae-d842-4c04-a797-48edf322504d"
  417. },
  418. {
  419. "core": false,
  420. "difficulty": 5,
  421. "slug": "phone-number",
  422. "topics": [
  423. "conditionals",
  424. "pattern_matching",
  425. "regular_expressions",
  426. "strings"
  427. ],
  428. "unlocked_by": "hamming",
  429. "uuid": "5f9139e7-9fbb-496a-a0d7-a946283033de"
  430. },
  431. {
  432. "core": false,
  433. "difficulty": 5,
  434. "slug": "nucleotide-count",
  435. "topics": [
  436. "conditionals",
  437. "exception_handling",
  438. "integers",
  439. "maps",
  440. "parsing",
  441. "searching",
  442. "strings"
  443. ],
  444. "unlocked_by": "hamming",
  445. "uuid": "2d80fdfc-5bd7-4b67-9fbe-8ab820d89051"
  446. },
  447. {
  448. "core": true,
  449. "difficulty": 5,
  450. "slug": "word-count",
  451. "topics": [
  452. "conditionals",
  453. "integers",
  454. "loops",
  455. "maps",
  456. "strings"
  457. ],
  458. "unlocked_by": null,
  459. "uuid": "3603b770-87a5-4758-91f3-b4d1f9075bc1"
  460. },
  461. {
  462. "core": false,
  463. "difficulty": 5,
  464. "slug": "run-length-encoding",
  465. "topics": [
  466. "integers",
  467. "pattern_matching",
  468. "strings",
  469. "transforming"
  470. ],
  471. "unlocked_by": "rotational-cipher",
  472. "uuid": "4499a3f9-73a7-48bf-8753-d5b6abf588c9"
  473. },
  474. {
  475. "core": true,
  476. "difficulty": 5,
  477. "slug": "robot-name",
  478. "topics": [
  479. "pattern_matching",
  480. "randomness",
  481. "regular_expressions",
  482. "strings",
  483. "text_formatting"
  484. ],
  485. "unlocked_by": null,
  486. "uuid": "d7c2eed9-64c7-4c4a-b45d-c787d460337f"
  487. },
  488. {
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  490. "difficulty": 5,
  491. "slug": "prime-factors",
  492. "topics": [
  493. "arrays",
  494. "conditionals",
  495. "integers",
  496. "lists",
  497. "loops",
  498. "mathematics"
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  500. "unlocked_by": "triangle",
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  502. },
  503. {
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  505. "difficulty": 5,
  506. "slug": "allergies",
  507. "topics": [
  508. "booleans",
  509. "conditionals",
  510. "enumerations",
  511. "integers",
  512. "lists",
  513. "loops"
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  515. "unlocked_by": "gigasecond",
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  520. "difficulty": 5,
  521. "slug": "bob",
  522. "topics": [
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  524. "conditionals",
  525. "strings"
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  527. "unlocked_by": "two-fer",
  528. "uuid": "34cd328c-cd96-492b-abd4-2b8716cdcd9a"
  529. },
  530. {
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  532. "difficulty": 5,
  533. "slug": "pascals-triangle",
  534. "topics": [
  535. "algorithms",
  536. "arrays",
  537. "exception_handling",
  538. "integers",
  539. "mathematics",
  540. "matrices"
  541. ],
  542. "unlocked_by": "matrix",
  543. "uuid": "d2a76905-1c8c-4b03-b4f7-4fbff19329f3"
  544. },
  545. {
  546. "core": false,
  547. "difficulty": 5,
  548. "slug": "bracket-push",
  549. "topics": [
  550. "stacks",
  551. "strings"
  552. ],
  553. "unlocked_by": "flatten-array",
  554. "uuid": "85aa50ac-0141-49eb-bc6f-62f3f7a97647"
  555. },
  556. {
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  558. "difficulty": 5,
  559. "slug": "series",
  560. "topics": [
  561. "conditionals",
  562. "lists",
  563. "loops",
  564. "strings",
  565. "type_conversion"
  566. ],
  567. "unlocked_by": "hamming",
  568. "uuid": "af80d7f4-c7d0-4d0b-9c30-09da120f6bb9"
  569. },
  570. {
  571. "core": false,
  572. "difficulty": 5,
  573. "slug": "atbash-cipher",
  574. "topics": [
  575. "cryptography",
  576. "security",
  577. "strings"
  578. ],
  579. "unlocked_by": "rotational-cipher",
  580. "uuid": "d36ce010-210f-4e9a-9d6c-cb933e0a59af"
  581. },
  582. {
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  584. "difficulty": 6,
  585. "slug": "spiral-matrix",
  586. "topics": [
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