2_Chp. 3 Vocabulary

Page 1

Chapter 3 Vocabulary

Abstract data type- In computer science, an abstract data type (ADT) is a mathematical model for data types where a data type is defined by its behavior (semantics) from the point of view of a user of the data, specifically in terms of possible values, possible operations on data of this type, and the behavior of these operations

ArithmeticException exception- A JCRE owned instance of ArithmeticException is thrown when an exceptional arithmetic condition has occurred. For example, a "divide by zero" is an exceptional arithmetic condition

Assignment statement- formed with an equals sign

Case sensitive- an uppercase is different than a lowercase

Class- a data type that can store data and methods

Concatenate- the value of a variable to a string

Constant- memory storage that cannot be changed

Data type- determines the type of data the variable will store

Declaration- a variable that has been declared

Equal sign (=) - an operator for the variables

Exception- an error affecting program

Floating point- numbers after the decimal type

Identifier- the variable name

Initialize- in addition to the variable being declared it is also initialized

InputMismatchException exception- when user input is not as expected

Input stream- characters received from an input device

Instantiation- create a new object

Integer division- truncates the decimal portion

Keyword- a word with special meaning

Literal- the value on the right of the "=" in the assignment statement

Logic error- a semantic error

Modulus division- returns the remainder

Numeric expression- at least one operand and possibly

Object- a variable declared with a class

Operator precedence- the level assigned to an operator so that a specific order of operations is maintained

Primitive data type- a data type that can store only a single piece of data

Prompt- a string that informs the user of the expected data to be typed

Run-time error- error affecting run time

Semantic error- logic error

Syntax error- error caused by a statement that violates the rules of Java

Truncate- removing the decimal portion of a number when casting a double to an int

Type casting- converting a number from one type to a different type

Variable- a name for a memory location that stores a value

Boolean- denoting a system of algebraic notation used to represent logical propositions, especially in computing and electronics

char- a single character

double- type of data

final- a word used to define

import- to put something onto your computer

in-

int- integer

java.lang- language used in java

java.text- classes used to code

java.util- utilities

NumberFormat- how you type a number

Scanner- a device that scans information

System.in- what you put into the system