Java for Fucking Idiots: Learn the Basics of Java Programming Without any experience!

"MEMES"
.equalsIgnoreCase(
"memes"
);
contains
For when you want to see if there’s a particular String inside your String.
Maybe you’re Mark Zuckerberg and want to see if a user’s Facebook post
contains “vaccines”.
//true
"Boy am I glad that vaccines were invented"
.contains(
"vaccines"
);
Note that 
contains
is case sensitive. That means it cares about if the
characters are uppercase or lowercase. i.e.
//false
"BOy I HatE HoW VACccINeS CauSe AUTisM!"
.contains(
"vaccines"
);

---

Hmm. How can we see if “vaccines” is inside there, no matter what case the
letters are in? I know! We’ll use containsIgnoreCase !
Just kidding – doesn’t exist! Dammit Java.
There’s one easy way to do to this for 99.9% of scenarios. It involves our
next superpower, so we’ll go over it first.
toLowerCase and toUpperCase
String bestGame =
"Old School Runescape"
;
//"OLD SCHOOL RUNESCAPE"
String bigBoy = bestGame.toUpperCase();
//"old school runescape"
String lilBoi = bestGame.toLowerCase();
Extremely straightforward. Just changes letters to either the upper- or
lower-case versions.
The people who wrote those methods? 
Not as straightforward for them
 .
containsIgnoreCase? Remember? Hello?
Ah, right! Okay, first, you just standardize what case the letters are in. Then
you can do contains .
String testString =
"BOy I HatE HoW VACccINeS CauSe AUTisM"
;
//"boy i hate how vaccines cause autism"
testString = testString.toLowerCase();
//true
testString.contains(
"vaccines"
);
If you really wanted to, you could instead change it toUpperCase and look
for “VACCINES”.
charAt

---

Remember “indexes” from arrays? You know, [0] gets the first element, [1]
gets the second element, and so on? Well that knowledge, unfortunately for
you, is coming back from the dead for this exercise.