Java Reference
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amount (calculated from the gallons per mile of the car). Write constructors and
toString
and
equals
methods for both classes. Create a
main
method with a menu
in a third class to test the other two classes.
5. Create a
Coin
class. It should have a private variable
face
that can be equal to either
HEADS
or
TAILS
, where the last two are integer constants. It should also contain the
private variable
bias
, which is the probability that you will get heads after flipping
the coin in the air (for a perfect coin
bias=0.5
). Create a
flip
method that assigns
a value to the variable
face
using a random number (e.g.,
Math.random()
)andthe
value of the variable
bias
. For example, if the random number is smaller than the bias,
then the coin should be heads. Also, create an
isHead
method that returns
true
when
the coins is heads. Write a
main
method that creates a coin, flips it 10000 times, and
then prints the number of heads. Create a
setBias
method that changes the variable
bias
. Use the method to change the bias of the coin and then run the experiment
again.
6.13 Lab
Write a bank application. The application should give you the following choices.
What do you want to do today?
1. Open account
2. Withdraw money
3. Deposit money
4. Show balance
5. Go home
The first option should open a new bank account. An object of type
BankAccount
should
be created and added to an array of bank accounts. Set the size of the array to 1000. When
a new bank account is created, the account number should be generated automatically. Use
a static variable to do so. For example, the account number can be the current value of
the static variable, where the static variable should be incremented by one after the bank
account is created. Choice 1 should print the account number. Choices 2-4 should ask for
the account number. A
for
loop can iterate through the array of bank accounts and find
the bank account with the correct account number. This is the bank account on which
the operation should be performed. All operations should be defined as methods. Make
sure that the
withdraw
method in the
BankAccount
class does not allow you to withdraw
more money than you have. The menu should be printed by the
menu
method in the main
class. Choice 5 should terminate the program. This can be done, for example, by calling
System.exit(0)
. This means terminate the program and return error code that signals
normal program termination.
6.14 Project
Rewrite the project from Chapter 5 to use an object-oriented design. Create the
Die
and
DiceCup
classes.
