JAVA programming need help ASAP

For this Programming Activity, you will create the SavingsAccount class, which inherits directly from the BankAccount class. The SavingsAccount class is similar to the CheckingAccount class in that both classes inherit from BankAccount.

The SavingsAccount class inherits from the version of the BankAccount class in which the balance is declared to be private. The SavingsAccount subclass adds an annual interestRate instance variable, as well as supporting methods to access, change, and apply the interest rate to the account balance. Please help,all that needs worked is the first class where the ***** are.

/* SavingsAccount class Anderson, Franceschi */

import java.text.NumberFormat;

// 1. ***** indicate that SavingsAccount inherits // from BankAccount public class SavingsAccount { public final double DEFAULT_RATE = .03; // 2. ****** define the private interestRate instance variable // interestRate, a double, represents an annual rate

// 3 ***** write the default constructor /** default constructor * explicitly calls the BankAccount default constructor * set interestRate to default value DEFAULT_RATE * print a message to System.out indicating that * constructor is called */

// 4 ***** write the overloaded constructor /** overloaded constructor * explicitly call BankAccount overloaded constructor * call setInterestRate method, passing startInterestRate * print a message to System.out indicating that * constructor is called * @param startBalance starting balance * @param startInterestRate starting interest rate */

// 5 ****** write this method: /** applyInterest method, no parameters, void return value * call deposit method, passing a month's worth of interest * remember that interestRate instance variable is annual rate */

/** accessor method for interestRate * @return interestRate */ public double getInterestRate( ) { return interestRate; }

/** mutator method for interestRate * @param newInterestRate new value for interestRate * newInterestRate must be >= 0.0 * if not, print an error message */ public void setInterestRate( double newInterestRate ) { if ( newInterestRate >= 0.0 ) interestRate = newInterestRate; else System.err.println( "Interest rate cannot be negative" ); }

// 6 ***** write this method /* toString method * @return String containing formatted balance and interestRate * invokes superclass toString to format balance * formats interestRate as percent using a NumberFormat object * To create a NumberFormat object for formatting percentages * use the getPercentInstance method in the NumberFormat class, * which has this API: * static NumberFormat getPercentInstance( ) */

}

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/** BankAccount class, version 1 * Anderson, Franceschi * Represents a generic bank account */ import java.text.DecimalFormat;

public class BankAccount { public final DecimalFormat MONEY = new DecimalFormat( "$#,##0.00" ); private double balance;

/** Default constructor * sets balance to 0.0 */ public BankAccount( ) { balance = 0.0; System.out.println( "In BankAccount default constructor" ); }

/** Overloaded constructor * @param startBalance beginning balance */ public BankAccount( double startBalance ) { deposit( startBalance ); System.out.println( "In BankAccount overloaded constructor" ); }

/** Accessor for balance * @return current account balance */ public double getBalance( ) { return balance; }

/** Deposit amount to account * @param amount amount to deposit; * amount must be >= 0.0 */ public void deposit( double amount ) { if ( amount >= 0.0 ) balance += amount; else System.err.println( "Deposit amount must be positive." ); }

/** withdraw amount from account * @param amount amount to withdraw; * amount must be >= 0.0 * amount must be <= balance */ public void withdraw( double amount ) { if ( amount >= 0.0 && amount <= balance ) balance -= amount; else System.err.println( "Withdrawal amount must be positive " + "and cannot be greater than balance" ); }

/** toString * @return the balance formatted as money */ public String toString( ) { return ( "balance is " + MONEY.format( balance ) ); } }

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/* Teller class for exercising the SavingsAccount class * Anderson, Franceschi */

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.text.*;

public class Teller extends JFrame { private JButton changeRate, applyInterest, deposit, withdraw, accountInfo, exit; private JTextArea ledgerActivity, ledgerBalance, ledgerRate; private String lActivity, lBalance, lRate; private double rate, balance, amount; private NumberFormat currency, percent; private static SavingsAccount s1; private JPanel buttonPanel, ledgerPanel;

public Teller( ) { super( "Savings Account Ledger" ); Container cp = getContentPane( );

buttonPanel = new JPanel( ); buttonPanel.setLayout( new FlowLayout( ) );

changeRate = new JButton( "Change interest rate" ); buttonPanel.add( changeRate ); ButtonHandler bh = new ButtonHandler( ); changeRate.addActionListener( bh );

applyInterest = new JButton( "Apply interest" ); buttonPanel.add( applyInterest ); applyInterest.addActionListener( bh );

deposit = new JButton( "Deposit" ); buttonPanel.add( deposit ); deposit.addActionListener( bh );

withdraw = new JButton( "Withdraw" ); buttonPanel.add( withdraw ); withdraw.addActionListener( bh );

accountInfo = new JButton( "Display Account Information" ); buttonPanel.add( accountInfo ); accountInfo.addActionListener( bh );

exit = new JButton( "Exit" ); buttonPanel.add( exit ); exit.addActionListener( new ActionListener( ) { public void actionPerformed( ActionEvent e ) { System.exit( 0 ); } } );

ledgerPanel = new JPanel( ); ledgerPanel.setLayout( new GridLayout( 1, 3 ) );

ledgerActivity = new JTextArea( ); lActivity = "ACTIVITY "; lActivity += "Account Opened "; ledgerActivity.setText( lActivity ); ledgerActivity.setEditable( false ); ledgerPanel.add( ledgerActivity );

currency = NumberFormat.getCurrencyInstance( ); ledgerBalance = new JTextArea( ); lBalance = "BALANCE "; lBalance += currency.format( s1.getBalance( ) ) + " "; ledgerBalance.setText( lBalance ); ledgerBalance.setEditable( false ); ledgerPanel.add( ledgerBalance );

percent = NumberFormat.getPercentInstance( ); ledgerRate = new JTextArea( ); lRate = "INTEREST RATE "; lRate += percent.format( s1.getInterestRate( ) ) + " "; ledgerRate.setText( lRate ); ledgerRate.setEditable( false ); ledgerPanel.add( ledgerRate );

cp.setLayout( new GridLayout( 2, 1 ) ); cp.add( buttonPanel ); cp.add( ledgerPanel );

setSize( 300, 350 ); setVisible( true ); }

private class ButtonHandler implements ActionListener { public void actionPerformed( ActionEvent e ) { if ( e.getSource( ) == accountInfo ) { JOptionPane.showMessageDialog( null, s1, "Account Information", JOptionPane.INFORMATION_MESSAGE ); } else { if ( e.getSource( ) == changeRate ) { rate = getInput( "new interest rate (Ex: .05 is 5%)" ); s1.setInterestRate( rate ); lActivity += "Rate changed "; } else if ( e.getSource( ) == applyInterest ) { s1.applyInterest( ); lActivity += "Interest applied "; } else if ( e.getSource( ) == deposit ) { amount = getInput( "amount to deposit" ); s1.deposit( amount ); lActivity += "Deposit "; } else if ( e.getSource( ) == withdraw ) { amount = getInput( "amount to withdraw" ); s1.withdraw( amount ); lActivity += "Withdrawal "; }

lBalance += currency.format( s1.getBalance( ) ) + " "; lRate += percent.format( s1.getInterestRate( ) ) + " "; ledgerActivity.setText( lActivity ); ledgerBalance.setText( lBalance ); ledgerRate.setText( lRate ); repaint( ); } } }

public double getInput( String inputItem ) { double amount = 0.0; String input = ""; boolean badInput = true; do { input = JOptionPane.showInputDialog( "Enter the " + inputItem ); if ( input != null ) { try { amount = Double.parseDouble( input ); badInput = false; } catch ( NumberFormatException nfe ) { badInput = true; JOptionPane.showMessageDialog( null, inputItem + " must be numeric", "Input error", JOptionPane.ERROR_MESSAGE ); } } }while ( badInput == true ); return amount; }

public static void main( String [] args ) { double balance = 0.0, rate = 0.0; String input = "";

boolean badBalance = true; boolean defaultObj = false;

do { input = JOptionPane.showInputDialog( "Enter the starting balance;" + " or press return to use the default constructor" );

if ( input == null ) { System.exit( 0 ); } else if ( input.length( ) == 0 ) { s1 = new SavingsAccount( ); // use default constructor badBalance = false; defaultObj = true; } else { try { balance = Double.parseDouble( input ); if ( balance < 0.0 ) JOptionPane.showMessageDialog( null, "Balance cannot be negative" ); else badBalance = false; } catch ( NumberFormatException e ) { JOptionPane.showMessageDialog( null, "Balance must be a number" ); } } }while ( badBalance );

if ( ! defaultObj ) { boolean badRate = true; do { try { input = JOptionPane.showInputDialog( "Enter the interest rate (for example .05 is 5%)" ); if ( input != null ) { rate = Double.parseDouble( input ); if ( rate < 0.0 ) JOptionPane.showMessageDialog( null, "Interest rate cannot be negative" ); else badRate = false; } else System.exit( 0 ); } catch ( NumberFormatException e ) { JOptionPane.showMessageDialog( null, "Interest rate must be a number" ); } }while ( badRate ); s1 = new SavingsAccount( balance, rate ); }

Teller app = new Teller( ); app.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } }