String Methods
Java also has a variety of methods you can use on Strings to manipulate them: https://www.w3schools.com/java/java_ref_string.asp
You should be familiar with the following methods:
- charAt()
 
- compareTo()
 
- compareToIgnoreCase()
 
- contains()
 
- equals()
 
- equalsIgnoreCase()
 
- indexOf()
 
- isEmpty()
 
- lastIndexOf()
 
- length()
 
- replace()
 
- split()
 
- substring()
 
- toCharArray()
 
- toLowerCase()