Java Cheat Sheet
Comprehensive reference for Java SE. Covers Syntax, OOP, Collections, and APIs.
Resources
Basics
Common Classes
String Class
String Methods
- charAt(int index)
- compareTo(String anotherString)
- concat(String str)
- contains(CharSequence s)
- endsWith(String suffix)
- equals(Object anObject)
- equalsIgnoreCase(String anotherString)
- getBytes()
- indexOf(String str)
- intern()
- isEmpty()
- lastIndexOf(String str)
- length()
- matches(String regex)
- replace(char old, char new)
- replaceAll(String regex, String replace)
- split(String regex)
- startsWith(String prefix)
- substring(int beginIndex, int endIndex)
- toCharArray()
- toLowerCase()
- toUpperCase()
- trim()
- valueOf(Object obj)
Number & Character
Collections & Data Structures
Interfaces
Implementations & Structures
Object Oriented Programming
Advanced Topics
Advanced Features