Question

(JAVA NetBeans)

Write programs in java

Modify the textbook example

textbook example:

//BankAccount.java

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 )
{
if ( balance >= 0.0 )
balance = startBalance;
else
balance = 0.0;
System.out.println( "In BankAccount overloaded constructor" );
}

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

============================================================================

//CheckingAccount.java

public class CheckingAccount extends BankAccount
{
/** default constructor
* explicitly calls the BankAccount default constructor
*/
public CheckingAccount( )
{
super( ); // optional, call BankAccount constructor
System.out.println( "In CheckingAccount "
+ "default constructor" );
}

/** overloaded constructor
* calls BankAccount overloaded constructor
* @param startBalance starting balance
*/
public CheckingAccount( double startBalance )
{
super( startBalance ); // call BankAccount constructor
System.out.println( "In CheckingAccount "
+ "overloaded constructor" );
}
}

============================================================================

//CheckingAccountClient.java

public class CheckingAccountClient
{
public static void main( String [] args )
{
// use default constructor
CheckingAccount c1 = new CheckingAccount( );
System.out.println( "New checking account: " + c1 + "\n" );

// use overloaded constructor
CheckingAccount c2 = new CheckingAccount( 100.00 );
System.out.println( "New checking account: " + c2 );
}
}

Modify the bank account and checking account of the textbook and plus one class stundent account

3. Write a Java program having a class StudentAccount which extends CheckingAccount. StudentAccount has its own new fields and methods. Examples 10.4, 10.5, and 10.6 BankAccount.java 1/* CheckingAccount Client, version 2 DCheckingAccount.java CheckingAccountClientjava Anderson, Franceschi 2 3 */ 4 5 public class CheckingAccountClient 6 C public static void main String 7e args { / use default constructor 10 CheckingAccount cl = new CheckingAccount ; System.out.println "New checking account: " c1 +"\n" ) ; 11 12 / use overloaded constructor CheckingAccount c2 new CheckingAccount 100.00); System.out.println "New checking account: "c2) 13 14 15 16 17 In BankAccount default constructor In CheckingAccount de fault constructor New checking account: balance is $0.00 In BankAccount overloaded constructor In CheckingAccount overloaded constructor New checking account: balance is $100.00 24 t Publishers, Inc. (www.jbpub.com)

Answer 1

/*
here we applied some login about account type which is part of student account
if initial balance is o then account is student type, otherwise it is saving type

also here we added some override method like add and withdraw that adjusted by super keyword
*/
package printerjob;

import java.text.DecimalFormat;

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

/** Default constructor
* sets balance to 0.0
*/
public StudentAccount( )
{
balance = 0.0;
accountype="StudentsAcc";
System.out.println( "In BankAccount default constructor" );
}
public void addbalance(int amount){
    balance=balance+amount;
    System.out.println("Newely Updated balance is "+balance);
}
public void withdraw(int amount){
    if(balance-amount<0)
        System.out.println("Invalid Withdraw");
    else
        System.out.println("After Withdraw newly balance is "+amount);
}

/** Overloaded constructor
* @param startBalance beginning balance
*/
public StudentAccount( double startBalance )
{
if ( balance >= 0.0 ){
balance = startBalance;
accountype="SavingAcc";
}
else
balance = 0.0;
System.out.println( "In BankAccount overloaded constructor" );
}

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

//CheckingAccount.java
//checkingTrascationn is count for transaction done by users
class CheckingAccount extends StudentAccount
{
int checkingTrascation=0;
public CheckingAccount( )
{
super( ); // optional, call BankAccount constructor
checkingTrascation++;
System.out.println( "In CheckingAccount "
+ "default constructor" );
    System.out.println("Transaction "+checkingTrascation+" Completed");
}

/** overloaded constructor
* calls BankAccount overloaded constructor
* @param startBalance starting balance
*/
public CheckingAccount( double startBalance )
{
super( startBalance ); // call BankAccount constructor
System.out.println( "In CheckingAccount "
+ "overloaded constructor" );
checkingTrascation++;
System.out.println("Transaction "+checkingTrascation+" Completed");
}

public void addbalance(int amount){
    // calling method from students account class override
    super.addbalance(amount);
    checkingTrascation++;
    System.out.println("Transaction "+checkingTrascation+" Completed");
}
public void withdraw(int amount){
    // calling method from students account class override
    super.withdraw(amount);
    checkingTrascation++;
    System.out.println("Transaction "+checkingTrascation+" Completed");
}

}

//CheckingAccountClient.java

public class CheckingAccountStudents
{
public static void main( String [] args )
{
// use default constructor
CheckingAccount c1 = new CheckingAccount( );
System.out.println( "New checking account: " + c1 + "\n" );

c1.addbalance(200);
    System.out.println("");
c1.withdraw(100);
    System.out.println("");

    System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++++++");

// use overloaded constructor
CheckingAccount c2 = new CheckingAccount( 100.00 );
System.out.println( "New checking account: " + c2 );
c2.addbalance(200);
    System.out.println("");
c2.withdraw(1000);
    System.out.println("");
}
}

/*

output

In BankAccount default constructor
In CheckingAccount default constructor
Transaction 1 Completed
New checking account: balance is $0.00 Account Type is StudentsAcc

Newely Updated balance is 200.0
Transaction 2 Completed

After Withdraw newly balance is 100
Transaction 3 Completed

+++++++++++++++++++++++++++++++++++++++++++++++++++++
In BankAccount overloaded constructor
In CheckingAccount overloaded constructor
Transaction 1 Completed
New checking account: balance is $100.00 Account Type is SavingAcc
Newely Updated balance is 300.0
Transaction 2 Completed

Invalid Withdraw
Transaction 3 Completed

*/