| Subdomain | Challenge | Difficulty | Max Score | Solution |
|---|---|---|---|---|
| Introduction | Welcome To Java | Easy | 3 | Solution |
| Introduction | Java Stdin and Stdout I | Easy | 5 | Solution |
| Introduction | Java If-Else | Easy | 10 | Solution |
| Introduction | Java Stdin and Stdout II | Easy | 10 | Solution |
| Introduction | Java Output Formatting | Easy | 10 | Solution |
| Introduction | Java Loops I | Easy | 10 | Solution |
| Introduction | Java Loops II | Easy | 10 | Not yet |
| Introduction | Java Datatypes | Easy | 10 | Solution |
| Introduction | Java End-of-file | Easy | 10 | Not yet |
| Introduction | Java Static Initializer Block | Easy | 10 | Not yet |
| Introduction | Java Int to String | Easy | 10 | Solution |
| Introduction | Java Date and Time | Easy | 15 | Not yet |
| Introduction | Java Currency Formatter | Easy | 15 | Not yet |
| String | Java Strings Introduction | Easy | 5 | Solution |
| String | Java Substring | Easy | 5 | Solution |
| String | Java String Comparisons | Easy | 10 | Not yet |
| String | Java String Reverse | Easy | 10 | Solution |
| String | Java Anagrams | Easy | 10 | Not yet |
| String | Java String Tokens | Easy | 15 | Not yet |
| String | Pattern Syntax Checker | Easy | 20 | Solution |
| String | Java Regex | Medium | 25 | Solution |
| String | Java Regex 2 - Duplicate Words | Medium | 25 | Not yet |
| String | Valid Username Regular Expression | Easy | 20 | Solution |
| String | Tag Content Extractor | Medium | 20 | Not yet |
| BigNumber | Java BigInteger | Easy | 10 | Not yet |
| BigNumber | Java BigDecimal | Medium | 20 | Not yet |
| BigNumber | Java Primality Test | Easy | 20 | Not yet |
| Data Structures | Java 1D Array | Easy | 5 | Solution |
| Data Structures | Java 2D Array | Easy | 10 | Not yet |
| Data Structures | Java Subarray | Easy | 10 | Not yet |
| Data Structures | Java Arraylist | Easy | 10 | Not yet |
| Data Structures | Java 1D Array (Part 2) | Medium | 25 | Not yet |
| Data Structures | Java List | Easy | 15 | Not yet |
| Data Structures | Java Map | Easy | 10 | Not yet |
| Data Structures | Java Stack | Medium | 20 | Not yet |
| Data Structures | Java Hashset | Easy | 10 | Not yet |
| Data Structures | Java Generics | Easy | 15 | Solution |
| Data Structures | Java Comparator | Medium | 10 | Not yet |
| Data Structures | Java Sort | Easy | 10 | Not yet |
| Data Structures | Java Dequeue | Medium | 20 | Not yet |
| Data Structures | Java BitSet | Easy | 20 | Not yet |
| Data Structures | Java Piority Queue | Medium | 20 | Not yet |
| Object Oriented Programming | Java Inheritance I | Easy | 5 | Solution |
| Object Oriented Programming | Java Inheritance II | Easy | 10 | Solution |
| Object Oriented Programming | Java Abstract Class | Easy | 10 | Solution |
| Object Oriented Programming | Java Interface | Easy | 10 | Solution |
| Object Oriented Programming | Java Method Overriding | Easy | 10 | Solution |
| Object Oriented Programming | Java Method Overriding 2 (Super Keyword) | Easy | 10 | Solution |
| Object Oriented Programming | Java Instanceof keyword | Easy | 10 | Solution |
| Object Oriented Programming | Java Iterator | Easy | 15 | Solution |
| Exception Handling | Java Exception Handling (Try-catch) | Easy | 10 | Solution |
| Exception Handling | Java Exception Handling | Easy | 15 | Solution |
| Advanced | Java Varargs - Simple Addition | Easy | 15 | Not yet |
| Advanced | Java Reflection - Attributes | Easy | 15 | Not yet |
| Advanced | Can You Access? | Medium | 15 | Not yet |
| Advanced | Prime Checker | Medium | 25 | Not yet |
| Advanced | Java Factory Pattern | Easy | 15 | Not yet |
| Advanced | Java Singleton Pattern | Easy | 15 | Not yet |
| Advanced | Java Visitor Pattern | Medium | 40 | Not yet |
| Advanced | Java Annotations | Medium | 25 | Not yet |
| Advanced | Covariant Return Types | Easy | 20 | Not yet |
| Advanced | Java Lambda Expressions | Medium | 30 | Not yet |
| Advanced | Java MD5 | Medium | 30 | Not yet |
| Advanced | Java SHA-256 | Medium | 30 | Not yet |