JavaProgramming Ch 1-4

A statement that establishes an identifier and associates attributes with it

A program that’s used to translate source code into code that can be executed by a computer

An event during program execution that prevents a program from continuing normally; generally, an error

The name of an item in a program written in the Java programming language

A value that is taken literally at each use

A number whose value is taken literally at each use

Complex data types that are constructed from primitive types

Statement that reserves a named memory location

A memory location whose declaration is preceded by the keyword "final", and whose value cannot change during program execution.

One in which all variables must be declared before they can be used

• The equal sign
• Any value to the right of the equal sign is assigned to the variable on the left of the equal sign

An assignment made when you declare a variable

The act of providing a value for a variable

Refers to the order in which operands are used with operators

The unknown value store in an uninitialized variable

A memory location whose declaration is preceded by the keyword final and whose value cannot change during program execution

The data-type transformation caused using a cast operator

A more complete name for the cast operator that performs explicit conversions

Uses only one operand

• Begins with backslash followed by a character
• The pair represents a single character

To retrieve and discard an entry without using it

The automatic transformation of one data type to another

A double

A float

• Performs an explicit-type conversion
• It is created by placing the desired result type in parenthesis before the expression to be converted

A unit of data used by the scanner class

All data items sent to methods in a method call

The data items received by a method

The arguments in a method call

The variables in a method declaration that accept the values from actual parameters

Ends a method and frequently sends a value from a called method back to the calling method

The relationship between an object and the class of which it is a member

Set values

Retrieve values

The name for a memory address where the object is held

A method that establishes an object

Any constuctor that accepts no parameters

A unique identifier for data within a database

A type whose implementation is hidden and accessed through its public methods

A principle of OOP that describes the encapsulation of method details within a class

• A series of statements that carry out a task.
• A declaration (or header or definition)
• Opening curly brace
• Body
• Closing curly brace

• Optional: access modifiers
• return type for the method
• method name
• opening parenthesis
• Optional: list of parameters
• closing parenthesis

• Optional: access modifier
• the keyword: class
• any legal identifier you choose for the name of your class
• p.127

• nonstatic
• p.127

• Constructors are instance methods
• The class of which it is a member

Using the modifier "new" operator

An abstract, programmer defined, data type

It models the characteristics of abstract or real objects using classes and objects

• Just-in-time compiler
• Converts byte code directly into machine language

• Java Virtual Machine
• byte code instruction set
• set of registers
• stack
• garbage-collected heap
• an area for storing methods

• The code within a set of curly braces
• p.136

By using the "new" operator followed by the class name

A function defined in a class

• A declaration (or header or definition)Opening and closing curly braces ({ })
• A body

• Optional access modifiers
• The return type for the method
• The method name
• Opening and closing parentheses
• An optional list of method parameters (multiple parameters are separated by commas)

• Methods that refer to objects (used with object instantiations).
• nonstatic methods

A program that’s designed to have parts of its code execute concurrently

A set of related classes

A data member of a class

• An executable program that has no“main” routine and so must run inside another environment.
• CGI

• Yes
• A data type that identifies the type of data that the variable will store
• An identifier, which is the variable’s name
• Optional-an assigned value when you want a variable to contain an initial value
• An ending semicolon

The programming feature that allows you to use a method name to encapsulate a series of statements

Method parameters

The variables in the method declaration

Void

• Assign the class a name
• Determine the data and methods that will be included in the class
• Create a class header

• An access modifier (optional - controls who can use classes, data members, and methods)
• A keyword class
• A legal identifier or name of the class

• Set values
• p.126

• Retrieve values
• p.126

• Ends a method and frequently sends a value back from the called method to the calling method.
• p.126

• The relationship between an object and the class of which it is a member.
• p.126

• No other classes can access the field's values, and only methods of the same class are allowed to set, get or otherwise use private variables.
• p.126

A type whose implementation is hidden and accessed through its public methods.

• A method that establishes an object. They have the same name as the class.
• new

A default, parameterless, constructor is automatically created by the compiler. The default constructor calls the default parent constructor (super()) and initializes all instance variables to default value (zero for numeric types, null for object references, and false for booleans).

False

• Writing multiple methods with a shared name, but each version has different arguments.
• The correct version of the method is chosen base on which arguments you pass to it.
• p.142

• Ambiguity
• p.144

• So that you can ensure that fields within classes are initialized to some appropriate default value. When you write your own constructors, they can receive parameters.
• p.147

class

• A value that doesn’t change.
• SG p.31

• A variable whose purpose is to hold a value that doesn’t change.
• SG p.31

They enable you to prevent other methods from changing a variable’s value by inserting the keyword "final" into the declaration.

uppercase

• Package
• SG p.32

P.158

• An object's memory address
• p. 150

• this
• It is usually implied, but sometimes you actually have to include the keyword "this" to make a class work correctly.
• p.150-151

• objectname.methodname();
• p.150