Java | HackerRank Solutions

Answers to all Java HackerRank challenges.

Welcome to Java!: 0:10
Java Stdin and Stdout I: 0:20
Java If-Else: 0:30
Java Stdin and Stdout II: 0:40
Java Output Formatting: 0:50
Java Loops I: 1:00
Java Loops II: 1:10
Java Datatypes: 1:20
Java End-of-file: 1:30
Java Static Initializer Block: 1:40
Java Int to String: 1:50
Java Date and Time: 2:00
Java Currency Formatter: 2:10
Java Strings Introduction: 2:20
Java Substring: 2:30
Java Substring Comparisons: 2:40
Java String Reverse: 2:50
Java Anagrams: 3:00
Java String Tokens: 3:10
Pattern Syntax Checker: 3:20
Java Regex: 3:30
Java Regex 2 - Duplicate Words: 3:40
Valid Username Regular Expression: 3:50
Tag Content Extractor: 4:00
Java BigDecimal: 4:10
Java Primality Test: 4:20
Java BigInteger: 4:30
Java 1D Array: 4:40
Java 2D Array: 4:50
Java Subarray: 5:00
Java Arraylist: 5:10
Java 1D Array (Part 2): 5:20
Java List: 5:30
Java Map: 5:40
Java Stack: 5:50
Java Hashset: 6:00
Java Generics: 6:10
Java Comparator: 6:20
Java Sort: 6:30
Java Dequeue: 6:40
Java BitSet: 6:50
Java Priority Queue: 7:00
Java Inheritance I: 7:10
Java Inheritance II: 7:20
Java Abstract Class: 7:30
Java Interface: 7:40
Java Method Overriding: 7:50
Java Method Overriding 2 (Super Keyword): 8:00
Java Instanceof keyword: 8:10
Java Iterator: 8:20
Java Exception Handling (Try-catch): 8:30
Java Exception Handling: 8:40
Java Varargs - Simple Addition: 8:50
Java Reflection - Attributes: 9:00
Can You Access?: 9:10
Prime Checker: 9:20
Java Factory Pattern: 9:30
Java Singleton Pattern: 9:40
Java Visitor Pattern: 9:50
Java Annotations: 10:00
Covariant Return Types: 10:10
Java Lambda Expressions: 10:20
Java MD5: 10:30
Java SHA-256: 10:40

Timings are approximate.

Cheers!