Way to generate random numbers with one line of code:
http://www.cs.geneseo.edu/~baldwin/reference/random.html
import java.util.Random;
Random
generator = new Random();
Or
Random
generator = new Random(12345678);
int randomIndex = generator.nextInt( n );
int throw = generator.nextInt(6)
+ 1; // dice
Sample questions:
For studying, you will
have under 10 questions similar to the ones on the two
quizzes you took. You will also have a few problems to code. So please study
from your quizzes and this guide.
This never stops looping. Tell me what is wrong
with this. (Please use the debugger while in class practicing.) public class q1{
public static void
main(String[] args){
for (int count=0; count != 5; count++)
{
if (count < 3)
System.out.println(count-3);
else
System.out.println(count+5);
count++;
}}}
Write a Boolean expression that is true when a
number is between (and not including) 7 and 10 or when the number is 33. Create a program with variable oneVal set to ABC and twoVal
set to DEF. In your program, swap the variable values so that oneVal becomes DEF and twoVal
becomes ABC. But, you cannot set oneVal = DEF or
twoVal = ABC. Start with: public class q3{
public static void
main(String[] args){
String oneVal =
“ABC”;
String twoVal = “DEF”;
// swap the values of oneVal
and twoVal below:
}}
Create a program that asks the user for a
quantity and prints out the price according to the table below:|
Quantity
Break |
Unit
price |
|
Less
than 5 |
$100 |
|
Greater
than or equal to 5 and less than 50 |
$80 |
|
Greater
than or equal to 50 and less than 100 |
$75 |
|
100
or more |
$70 |
For example:
If the
user enters 4, it should print 4 at 100 = $400.00
Format the
price as currency.
List the test cases that would be good for the
program above. Create a program that asks a user for a price and
a discount percentage and a tax rate. Calculate the final price with the
discount and tax rate applied and print the result. Format the final price
as currency in your answer. Keep asking the user if they
want to continue until they type no.
Create a program that asks the user for a name.
Change that name to have every other letter capitalized and print it out.
Keep asking the user for another name until they
type END instead of a name. ---------------------------------------
Draw a flow chart for the problem of graphing the function f(x) = (x - 4) (x - 5) + 1, for a range of values of x given by the user, as described below.
First, read in two integers,
representing the range of values of x, i.e. read in the low value and the high
value of x. For each value of x, compute y = (x - 4) * (x - 5) + 1, and print y
asterisks. For example, if x = 2, then y = 7, so 7 asterisks should be drawn on
the same line. If the user enters 2 and 7 as the low and high values of x
respectively, then the output should look like this:
Enter the low value of x: 2
Enter the high value of x: 7