Ch 3 - Expressions

Question 1

What is an expression composed of

Answer 1

Terms and Operators

Question 2

A variable has three important attributes

Answer 2

Name, value, type

Question 3

Names in Java are called?

Answer 3

Identifiers

Question 4

What is a variable?

Answer 4

a placeholder for a value. A box with a label attached to the outside

Question 5

Syntax for declarations

Answer 5

type identifier = expression(initial value);

Question 6

Local Variable

Answer 6

Variables declared inside a method

Question 7

Instance Variables or ivars

Answer 7

Variables declared within a class but outside of any method and are stored as part of each object

Question 8

class variables

Answer 8

Class variables are associated with all objects of a particular class and not with individual objects

Question 9

What is the private keyword

Answer 9

indicates that it can only be used within the class that defines it

Question 10

What is the final keyword

Answer 10

Declares that the value will not change after the variable is initialized

Question 11

type cast syntax

Answer 11

int n = (int) 1.9999;

Question 12

type cast example

Answer 12

int feet = (int) (total inches/inches_per_foot);

Question 13

How do you assign a new value to a variable

Answer 13

Assignment statement

Question 14

balance += deposit;

Answer 14

Add deposit to balance

Question 15

x++;

Answer 15

x += 1;

Question 16

balance -= surcharge;

Answer 16

subtract surcharge from balance

Question 17

Add y to x

Answer 17

x += y;

Question 18

Subtract y from x

Answer 18

x -=y;

Question 19

Add 1 to x

Answer 19

x++;

Question 20

Subtract 1 from x

Answer 20

x–;