APCSA Chapter 8: Improving User Interface

what are 2 examples of programs that repeat

- count controlled

- sentinel controlled

define query controlled input

the program will ask the user if they want to continue after values are inputted and the program has run

what is it called when the program will ask the user if they want to continue after values are inputted and the program has run

query controlled input

what are the 4 parts of a menu driven program

- begins with a menu

- user will pick an option

- program will run

- menu will be displayed again

what do you call a program that, begins with a menu, user will pick an option, program will run, and menu will be displayed again

menu driven program

where is the printf statement located

in the java.io package

what are printf statements used for

used to print out number formats

what are used to print out number formats

printf statements

what is the letter for floating point number

f

what does the letter f mean

floating point number

what is the letter for decimal integer

d

what does the letter d mean

decimal integer

what is the letter for string

s

what does the letter s mean

string

what is used for the % sign

%%

what does %% mean

% sign

what is used for a new line

%n

what does %n mean

new line

(not neccessarily in notes) what should you always make sure matches up in printf statements

number of variables and type match

what does %- do

left justify (spaces go right instead of left)

what makes something left justified

%-

what does %, do

decimal separator (ex. 123,456)

what is the decimal separator

%,

what does %0 do

shows leading 0 (ex. 00012)

what shows the leading zeros

%0

in Scanner, which methods detect if data entered is in an invalid format

nextDouble, nextInt

what does try-catch do

detect an error, recover and the program will keep going

what can detect an error, recover and the program will keep going

try-catch statement

what exception is thrown when an invalid data type is used

Exception e

what exception is thrown when trying to divide by 0

Arithmetic Exception e