Java Vocabulary

Front 1

Variable

Back 1

Represents objects (words, letters, numbers, and so on)

Front 2

Primitive

Back 2

Variables that reserve memory
Examples: int (numbers), double (decimals), boolean (true/false)

Front 3

Method

Back 3

Actions/instructions. End in parentheses.

Front 4

Object

Back 4

Set of data combined with methods/actions, statuses, and behavior. Example: JButton fire = new JButton

Front 5

Variable declaration

Back 5

double pi = 3.14;
private JBUtton = flyButton;
myPetRock (declaration) = new (instantiation)

Front 6

Constructor method

Back 6

Like a method, but shares same name as class and cannot return a value

Front 7

Method paremeters

Back 7

Methods return data (unless it's void). Parameters are stuff in the method's parentheses.
Example: public drawNow(String s)

Front 8

Assignment

Back 8

Values assigned to variables
Example: int a = 5
^

Front 9

Void

Back 9

A method that does not have a return type
*Never used in constructors

Front 10

Applets versus Applications

Back 10

(All programs are either applications or applets.)
-Applets usually smaller
-Applets contain contain init() method
-Applets basically internet applications

-Applications contain main() method
-Have access to entire computer

Front 11

Public

Back 11

Visible to al

Front 12

Private

Back 12

Visible only to the class to which they belong

Front 13

Scope

Back 13

The accessibility of a variable.
-If variable declared at top of class, is accessible to all other methods. If declared in method, can only be used in that method (local method).

Front 14

Literal

Back 14

Values for variables that are written directly into a program. Represents the values of all primitives.
Example: boolean = true; int = 7

Front 15

Object instantiation

Back 15

myPetRock (declaration) = new (instatiation)

Front 16

Return

Back 16

Used to finish the execution of a method. Transfers back to the caller of the method.

Front 17

Algorithm

Back 17

Step-by-step procedures for calculations

Front 18

Local variables

Back 18

Declared in method and only visible/usable within said method.