Efficient solutions to HackerRank problems

• Java

Java

Subdomain	Challenge	Points	Solution
Introduction	Welcome to Java!	3	Solution.java
Introduction	Java Stdin and Stdout I	5	Solution.java
Introduction	Java If-Else	10	Solution.java
Introduction	Java Stdin and Stdout II	10	Solution.java
Introduction	Java Output Formatting	10	solution.java
Introduction	Java Loops I	10	solution.java
Introduction	Java Loops II	10	solution.java
Introduction	Java Datatypes	10	solution.java
Introduction	Java End-of-file	10	solution.java
Introduction	Java Static Initializer Block	10	solution.java
Introduction	Java Int to String	10	solution.java
Introduction	Java Date and Time	10	solution.java
Introduction	Java Currency Formatter	15	solution.java
Strings	Java Strings Introduction	5	solution.java
Strings	Java Substring	5	solution.java
Strings	Java Substring Comparisons	10	solution.java
Strings	Java String Reverse	10	solution.java
Strings	Java Anagrams	10	solution.java
Strings	Java String Tokens	15	solution.java
Strings	Pattern Syntax Checker	20	solution.java
Strings	Java Regex	25	solution.java
Strings	Java Regex 2 - Duplicate Words	25	solution.java
Strings	Valid Username Regular Expression	20	solution.java
Strings	Tag Content Extractor	20	solution.java
BigNumber	Java BigDecimal	20	solution.java
BigNumber	Java Primality Test	20	solution.java
BigNumber	Java BigInteger	10	solution.java
Data Structures	Java 1D Array	5	solution.java
Data Structures	Java 2D Array	10	solution.java
Data Structures	Java Subarray	10	solution.java
Data Structures	Java Arraylist	10	solution.java
Data Structures	Java 1D Array (Part 2)	25	solution.java
Data Structures	Java List	15	solution.java
Data Structures	Java Map	10	solution.java
Data Structures	Java Stack	20	solution.java
Data Structures	Java Hashset	10	solution.java
Data Structures	Java Generics	15	solution.java
Data Structures	Java Comparator	10	solution.java
Data Structures	Java Sort	10	solution.java