APCSA Unit 1 Primitive Types

Compiler

Software that translate the Java source code (ends in .java) into the Java class file (ends in .class)

Compile time error

An error that is found during the compilation. These are also called Syntax errors

Main Method

Where execution starts in a java program

Boolean

An expression that is either true or false

Camel Case

One way to create a variable name by appending several words together and upper-casing the first and letter of each word after the first word (myScore)

Casting a variable

Changing the type of a variable using (type) name

Double

a type in java that is used to represent decimal values like -2.5 and 323.203

Declare a variable

Specifying the type and name for a variable. This sets aside memory for a variable that type and associates the name with that memory location

Initializing a variable

The first time you set the value of a variable

Integer

A whole number like -32 or 6323

Modulo

The % operator which returns the remainder from one number divide by another

Operator

Common mathematical symbols such as + for addition and * for multiplication

Shortcut Operators

Operators like x++ which means x = x + 1 or x = y which means x = x y

Variable

A name associated with a memory location in the computer

boolean

Static

means that the field or method exists in the object that defines the class