cpsc 231

compiled language

(java and c++) languages that are converted into bytecode before running

interpreted language

(python) read line by line while being ran

primitive types

thing like int, boolean

object types

things like string, linked list

are strings mutable

they are imutable

string types

charAt() .equals() .upperCase

public methods

can be used in any class

private methods

can only be used in the class its created in

void methods

does not return anything

non void method

has to return a value

when to use array list

when you need to acess random indeces and are mainly adding things to the beggining and end of the list (takes less memory)

when to use linked list

not good for random indexing but faster at inserting and removing elements at the beginning and middle of the list

benefits of compiled language

it runs faster because it is getting compiled but it takes longer to develop and debug

benefits of interpretive language

easier to work through and debug but will run slower

.this meaning

s a keyword that acts as a reference to the current object instance within a class

abstract classes

can contain abstract methods and act as a base or template for other methods

-cant make any objects in this class

abstract methods

-don’t need any parameters

method overridding

taking a method from another class maybe the (master one or wtv) but changing what the return will be based on what we want to do (meow)

method overloading

having methods with the same name but dif parameters if one gets chosen over the other ones its overloaded

how to get an inherited class

public class two extends one {

(it’ll now have access to all the info from the parent class)

abstraction

the concept of hiding all the complex details and only showing important aspects of a method

encapsulation

hiding certain parts of class for security using like private and can only be accessed through getters and setters

what happens if the catch block doesn’t work

the exception is not caught and the code will crash and the rest will be skipped

what happens if you try to read a file that doesnt exist

FileNotFoundException will be thrown