Chapter 1: Creating Java Programs

Question 1

Computer program

Answer 1

A set of written instructions that tells the computer what

to do

Question 2

Machine language

Answer 2

– The most basic circuitry-level language

– A low-level programming language

Question 3

High-level programming language

Answer 3

Allows you to use a vocabulary of reasonable terms

Question 4

Syntax

Answer 4

A specific set of rules for the language

Question 5

Program statements

Answer 5

– Similar to English sentences

– Commands to carry out program tasks

Question 6

Compiler

Answer 6

Translates language statements into machine code

Question 7

Syntax error

Answer 7

Misuse of language rules

Question 8

Object-oriented programs

Answer 8

– Create classes
• Blueprints for an object
– Create objects from classes
– Create applications

Question 9

Object-oriented programming was used most frequently for

three major types of applications

Answer 9

– Development of Scientific Applications
– Web, Mobile, Game, and Enterprise Applications
– Graphical user interfaces (GUIs)

Question 10

Class

Answer 10

Describes objects with common properties

Question 11

Objects

Answer 11

Specific, concrete instances of a class

Question 12

Method

Answer 12

A self-contained block of program code that carries out an

action

Question 13

Encapsulation

Answer 13

Conceals internal values and methods from outside

sources

Question 14

Java

Answer 14

– Developed by Sun Microsystems
– An object-oriented language
– General-purpose
– Advantages
• Security features
• Architecturally neutral
– Can be run on a wide variety of computers
– Does not execute instructions on the computer directly
– Runs on a hypothetical computer known as a Java Virtual
Machine (JVM)

Question 15

Source code

Answer 15

Programming statements written in high-level

programming language

Question 16

Development environment

Answer 16

A set of tools used to write programs

Question 17

Bytecode

Answer 17

– Statements saved in a file
– A binary program into which the Java compiler converts
source code

Question 18

Java interpreter

Answer 18

– Checks bytecode and communicates with the operating
system
– Executes bytecode instructions line by line within the Java
Virtual Machine`

Question 19

Applets

Answer 19

Programs embedded in a Web page

Question 20

Java applications

Answer 20

Called Java stand-alone programs
– Console applications
We will write these types of applications this semester.
• Support character output

– Windowed applications
• Menus
• Toolbars
• Dialog boxes

Question 21

Literal string

Answer 21

Written between double quotation marks

Question 22

Arguments

Answer 22

Pieces of information passed to a method

Question 23

System class

Answer 23

Refers to the standard output device for a system

Question 24

static

Answer 24

Means the method is accessible and usable even though 
no objects of the class exist

Question 25

void

Answer 25

– Use in the main() method header – Does not indicate the main() method is empty – Indicates the main() method does not return a value when called – Does not mean that main() doesn’t produce output

Question 26

WHAT TO TYPE: Compiling a Java class

Answer 26

javac First.java

Question 27

Compile-time error

Answer 27

``` – The compiler detects a violation of language rules – Refuses to translate the class to machine code ```

Question 28

Parsing

Answer 28

Compiler divides source code into meaningful portions

Question 29

Run-time error

Answer 29

– Not detected until execution | – Often difficult to find and resolve

Question 30

Line comments

Answer 30

* Start with two forward slashes (//) | * Continue to the end of the current line

Question 31

Block comments

Answer 31

* Start with a forward slash and an asterisk (/*) | * End with an asterisk and a forward slash (*/)

Question 32

package

Answer 32

A group of classes