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• Java
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• Cracking the Coding Interview
• Interview Preparation Kit
• Functional Programming

Java

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