# Useful Java knowledge

- [Arrays vs Math vs Collections](/leetcode-notebook/useful-java-knowledge/arrays-vs-math-vs-collections.md)
- [Integer vs int](/leetcode-notebook/useful-java-knowledge/integer-vs-int.md)
- [String vs string vs char vs Character](/leetcode-notebook/useful-java-knowledge/string-vs-string-vs-char-vs-character.md)
- [StringBuilder vs StringBuffer](/leetcode-notebook/useful-java-knowledge/stringbuilder-vs-stringbuffer.md)
- [ArrayList vs Array](/leetcode-notebook/useful-java-knowledge/arraylist-vs-array.md)
- [Stack & Queue](/leetcode-notebook/useful-java-knowledge/stack-and-queue.md)
- [HashMap](/leetcode-notebook/useful-java-knowledge/hashmap.md)
- [LinkedList](/leetcode-notebook/useful-java-knowledge/linkedlist.md)
