import java.text.NumberFormat;
/**
* Represents a bank account; allows deposits, withdrawals, balance inquiries,
* etc.
*
* @author *** YOUR NAME HERE ***
*/
public class Account
{
public static final double RATE = 0.035; // interest rate of 3.5%
___________________________________________________________; // $10 fee
private long acctNumber;
private double balance;
private String name;
/**
* Sets up the account object by defining its owner, account number, and
* initial balance.
*
* @param owner the owner of the account
* @param number the account number
* @param initial the initial balance in the account
*/
public Account(String owner, long account, double initial)
{
name = owner;
acctNumber = account;
balance = initial;
}
/**
* Deposits the amount from the account and returns
*
* @return the new balance
*/
public double deposit (double amount)
{
balance += amount;
return balance;
}
/**
* Simple withdrawal -- deducts amount from balance
*
* @return the new balance
*/
public double withdraw(double amount)
{
balance -= amount;
return balance;
}
/**
* Adds interest to the account
*
* @return the new balance
*/
public double addInterest ()
{
balance = balance + balance * RATE;
return balance;
}
/**
* Gets the current balance
*
* @return the new balance
*/
public double getBalance()
{
return balance;
}
/**
* Deducts the service fee and returns the new balance.
*
* @return the new balance
*/
public double chargeFee()
{
// deduct the fee
____________________________________________________
// return the updated balance
____________________________________________________
}
/**
* Changes the name on the account to newName.
*
* @param newName new name on the account
*/
public void setName(String newName)
{
___________________________________________________
}
/**
* Convert account to a String
*
* @return string representation of the account
*/
public String toString ()
{
NumberFormat fmt = NumberFormat.getCurrencyInstance();
return "Account number: " + acctNumber + "\nOwner: "
+ name + "\nCurrent balance: " + fmt.format(balance);
}
}
/**
* Uses the Account class to create and
* manipulate bank accounts for Sally and Joe.
*
* @author *** YOUR NAME HERE ***
*/
public class ManageAccounts
{
/**
* Uses the Account class to create and
* manipulate bank accounts for Sally and Joe.
*/
public static void main(String[] args)
{
Account account1, account2;
//create account1 for Sally for $1000
account1 = new Account("Sally", 12345, 1000);
//create account2 for Joe with $500 and account number 11229
______________________________________________
//deposit $100 to Joe's account
______________________________________________
//withdraw $50 from Sally's account
______________________________________________
//charge fees to both accounts
______________________________________________
______________________________________________
//change name on Joe's account to Joseph
______________________________________________
//print summary for both accounts
______________________________________________
______________________________________________
}
}
The following is an incomplete class declaration. Fill in the data declarations and methods as indicated in the comments and the above description of the class.
/**
* Defines a class that represents a student with a name, score on test 1, and
* score on test 2. Methods set test grades, compute the average, determine the
* higest test grade, and determine the letter grade corresponding to the
* average.
*
* @author *** YOUR NAME HERE ***
*/
public class Student
{
//declare instance data
____________________________________________ // name
____________________________________________ // grade for test #1
____________________________________________ // grade for test #2
/**
* Initializes a student object using the name passed in.
*
* @param studentName The name of the student.
*/
public Student(String studentName)
{
// Assign the instance variable name the value passed in
// and initialize the two test grades to 0
}
/**
* Assigns the score passed in to the test indicated by the
* second parameter.
* @param score The test score.
* @param whichTest An integer indicating which test the
* score is for (1 for test #1, 2 for test #2)
*/
public void setTestScore(int score, int whichTest)
{
// write an if statement to set the correct test grade
}
/**
* Gets the name of a student
*
* @return the student's name.
*/
_________________________________________________ //fill in header
{
// fill in the body of the method (just one line!)
_____________________________________________________;
}
/**
* Computes the average of the student's test grades.
*
* @return The student's test average.
*/
_____________________________________________________ //fill in header
{
// Compute and return the average (it can be done in one statement -
// be sure to use floating point arithmetic)
_______________________________________________________ ;
}
/**
* Determines the highest test grade.
*
* @return The higest test grade.
*/
______________________________________________________ // fill in header
{
// Fill in the blank to return the highest test grade - this
// can be done in one statement using a method from the Math class.
______________________________________________________________ ;
}
/**
* Finds the letter grade (type char) corresponding to the student's
* average assuming an average greater than or equal to 90 is an A,
* from 80 up to 90 is a B, and so on. Below 60 is an F.
*
* @return The letter grade.
*/
______________________________________________________ (fill in the header)
{
double average = averageScore(); // call the method to compute
// the average
char letter;
// Use a cascading if statement to assign the correct
// letter grade to the variable letter
// Return the letter grade
return letter;
}
}
import java.util.Scanner;
/**
* Uses the Student class to get test grades for two students and compute
* averages, letter grade, etc. for each.
*
* @author *** YOUR NAME HERE ***
*/
public class StudentGrades
{
/**
* Uses the Student class to get test grades for two students and compute
* averages, letter grade, etc. for each.
*/
public static void main (String[] args)
{
Scanner scan = new Scanner (System.in);
String name;
int score;
System.out.print ("Enter the first student's name: ");
name = scan.nextLine();
Student student1 = new Student (name);
System.out.print ("Enter the second student's name: ");
name = scan.nextLine();
Student student2 = new Student (name);
System.out.print ("Enter " + student1.getName() + "'s test 1 grade: ");
score = scan.nextInt();
// Invoke setTestScore to set test 1 grade for student1
____________________________________________________________________;
System.out.print ("Enter " + student1.getName() + "'s test 2 grade: ");
score = scan.nextInt();
// Invoke setTestScore to set test 2 grade for student1
____________________________________________________________________;
// Invoke setTestScore to set student2's first test score to 78
// and second test score to 83.
____________________________________________________________________;
____________________________________________________________________;
// Determine each student's test average.
double average1 = student1.averageScore();
double average2 = student2.averageScore();
// Write an if ...else... statement that prints the message
// "Great work!" if student1's average is greater than 84; "Doing
// fine" if the average is between 70 and 84 (inclusive);
// "Work harder" otherwise
// Write an if ... else that determines who has the highest
// average - use the getName method to print the name of the person
// Be sure to also test for a tie.
}
}