| Problem | Solution Link | Difficulty |
|---|---|---|
| Java Strings Introduction | Solution | Easy |
| Java Substring | Solution | Easy |
| Java Substring Comparisons | Solution | Easy |
| Java String Reverse | Solution | Easy |
| Java Anagrams | Solution | Easy |
| Java String Tokens | Solution | Easy |
| Pattern Syntax Checker | Solution | Easy |
| Java Regex | Solution | Easy |
| Java Regex II - Duplicate Words | Solution | Medium |
| Valid Username Regular Expression | Solution | Easy |
| Problem | Solution Link | Difficulty |
|---|---|---|
| Java Inheritance I | Solution | Easy |
| Java Inheritance II | Solution | Easy |
| Java Abstract Class | Solution | Easy |
| Java Interface | Solution | Easy |
| Java Method Overriding | Solution | Easy |
| Java Method Overriding II (Super Keyword) | Solution | Easy |
| Problem | Solution Link | Difficulty |
|---|---|---|
| Java BigDecimal | Solution | Medium |
| Problem | Solution Link | Difficulty |
|---|---|---|
| Java Primality Test | Solution | Easy |
| Java Big Integer | Solution | Easy |