A quick question on booleans.

in addition, you can use methods that return a boolean to store variables as well, like in the repl, when Craig used

someWords.contains("bunch"); that method returns a boolean value. in the repl, it assigned the boolean its own variable, because Craig did not assign one himself.

if you see a method like: public boolean contains(){ //some code to check if it has the word } it will return a boolean variable that contains an either true or false value. so I could say: boolean hasWord = someString.contains("word"); and the hasWord variable will store that true or false return value.

this especially comes in handy if you want that variable to change at a specific time in your program. for example: If I was making a java program that was a blackjack simulator, and only wanted the player to be able to hit after the dealer had already dealt the cards.

In the beginning of my program I could say: boolean hasDealt = false; if (hasDealt=false){ //dont allow player to hit }else{ hit(); }

but in my deal method I would set the hasDealt variable to true, allowing the program to continue.

Sorry for my extremely verbose explanation.

tl;dr: Yes the boolean determines a true or false but it is also a primitive data type like int and double as stated above, allowing you to store and change these values throughout your program at your will.