AP CSA: Unit 1: Primitive Types

Class

public class MyProgram

Main Method

public static void main(String[] args)

Java Skeleton

Class + main method

Literal

The fixed value being assigned to a variable

Reference

Made by programmers, reference the address of a data type rather than the data itself

Primitive

Most basic data type in Java, simple data types (int, double, Boolean)

Arithmetic Exception

Warns programmers of arithmetic errors in the code

Compound Assignment Variables

shortcut that allows variables to be reassigned a new value (x += y)

Package

Used to group data in a folder for easier use

import java.util.Scanner;

Scanner Class

A class within Java.util, contains code for user input.

Scanner input = new Scanner(system.in)

Casting

turning something from one data type to another

implicit Casting

When the program auto casts a value without the programmer needing to do so

Integer.MIN_Value

-2147483647

User Input

int number = input.nextInt()