HackerRank Java problems solutions

1. HackerRank Welcome to Java! problem solution
2. HackerRank Java Stdin and Stdout I problem solution
3. HackerRank Java If-Else problem solution
4. HackerRank Java Stdin and Stdout II problem solution
5. HackerRank Java Output Formatting problem solution
6. HackerRank Java Loops I problem solution
7. HackerRank Java Loops II problem solution
8. HackerRank Java Datatypes problem solution
9. HackerRank Java End-of-file problem solution
10. HackerRank Java Static Initializer Block solution
11. HackerRank Java Int to String problem solution
12. HackerRank Java Date and Time problem solution
13. HackerRank Java Currency Formatter problem solution
14. HackerRank Java Strings Introduction problem solution
15. HackerRank Java Substring problem solution
16. HackerRank Java Substring Comparisons problem solution
17. HackerRank Java String Reverse problem solution
18. HackerRank Java Anagrams problem solution
19. HackerRank Java String Tokens problem solution
20. HackerRank Pattern Syntax Checker solution in java
21. HackerRank Java Regex problem solution
22. HackerRank Java Regex 2 — Duplicate Words solution
23. HackerRank Valid Username Regular Expression solution in java
24. HackerRank Tag Content Extractor solution in java
25. HackerRank Java BigDecimal problem solution
26. HackerRank Java Primality Test problem solution
27. HackerRank Java BigInteger problem solution
28. HackerRank Java 1D Array problem solution
29. HackerRank Java 2D Array problem solution
30. HackerRank java Subarray problem solution
31. HackerRank Java Arraylist problem solution
32. HackerRank Java 1D Array (Part 2) problem solution
33. HackerRank Java List problem solution
34. HackerRank Java Map problem solution
35. HackerRank Java Stack problem solution
36. HackerRank Java Hashset problem solution
37. HackerRank Java Generics problem solution
38. HackerRank Java Comparator problem solution
39. HackerRank Java Sort problem solution
40. HackerRank Java Dequeue problem solution
41. HackerRank Java BitSet problem solution
42. HackerRank Java Priority Queue problem solution
43. HackerRank Java Inheritance I problem solution
44. HackerRank Java Inheritance II problem solution
45. HackerRank Java Abstract Class problem solution
46. HackerRank Java Interface problem solution
47. HackerRank Java Method Overriding problem solution
48. HackerRank Java Method Overriding 2 (Super Keyword) solution
49. HackerRank Java Instanceof keyword problem solution
50. HackerRank Java Iterator problem solution
51. HackerRank Java Exception Handling (Try-catch) solution
52. HackerRank Java Exception Handling problem solution
53. HackerRank Java Varargs — Simple Addition solution
54. HackerRank Java Reflection — Attributes problem solution
55. HackerRank Can You Access? problem solution in java
56. HackerRank Prime Checker problem solution in java
57. HackerRank Java Factory Pattern problem solution
58. HackerRank Java Singleton Pattern problem solution
59. HackerRank Java Visitor Pattern problem solution
60. HackerRank Java Annotations problem solution
61. HackerRank Covariant Return Types solution in java
62. HackerRank Java Lambda Expressions problem solution
63. HackerRank Java MD5 problem solution
64. HackerRank Java SHA-256 problem solution