Programming help please! UPDATED!

[Xtr3m3]

My friend is stuck with this...and the ko4life has lots of programmers (I think) Can you guys help us ?

Much thanks is advance

Friend quote:



I created a class called Bank;
And the corresponding testclass to work with the first class.
But when i run the program it does not do what i want it to do.

i want it to return the deposit amount. And apparently it returns some sort of default value, that is equal to zero.

This is the class Bank:

//create a class called Bank
public class Bank
{
//Declaration of class: field variables
private double balance;
private String account;
public double amount;
public double newBalance;

//build constructor
public Bank(double initialBalance, String AccountNumber)
{
balance=initialBalance;
account=AccountNumber;
}

//mutator methods: operate by redifining a given variable
public void deposit(double amount)//this method needs to add to the balance
{
double newBalance=balance+amount;
balance=newBalance;
}
public void withdraw(double amount)
{
double newBalance=balance-amount;
balance=newBalance;
}

//accessor methods: operate via the return statement
//accessing the balance
public double getBalance()
{
return balance;
}
//accessing the account number
public String getAccountNumber()
{
return account;
}
// need to build the getTransaction method??????
public double getTransaction()
{

return amount;
}

}


This is the testclass:

//create testclass called "TestBank"
class TestBank
{ //create main method:
public static void main(String[] arg)
{ //create new object within the class "Bank" with reference variable "b"
Bank b= new Bank(100,"098-055-9325");
//print line with accessor methods retrieving the information via the return statement
System.out.println("Account: "+b.getAccountNumber()+"\tOpening balance $"+b.getBalance());
//make a deposit
b.deposit(50);
System.out.println("Deposit $"+b.getTransaction()+"\t\tNew balance $"+b.getBalance());

}

}

This is the corresponding output of the program:

Account: 098-055-9325 Opening balance $100.0
Deposit $0.0 New balance $150.0

Once again, i can successfully add the $50,0 to the account and fetch the new balance;
but i cannot fetch correctly the deposit amount.

This is where i am stuck.

[VictoryAkara]

Hm, Weird - //make a deposit
b.deposit(50);

Tell's it that it had a deposit of 50, And your getting the correct after and it's not displaying... hm, Weird :/ I don't see anything wrong with the script however I am slightly tipsy so yea.

[Xtr3m3]

Anybody else? :unsure:

He says that when he prints it out is not displaying...it displays as 0

[Amano]

u got nothing that set amount

[Xtr3m3]

Huh? Can you go into more details please I'm dumb with this

[Xtr3m3]

UPDATED!

I am having the problem with the following part of the program:

// need to build the getTransaction method??????

public double getTransaction()
{
return amount;
}


I need to build a method to return the "amount" that was just deposited;

I am successfully depositing the amount, and fetching the new balance, but i cannot fetch the amount that i just added via the return statement. I think it is because amount is not a field, rather a parameter inside the a method, but i do not know how to fetch a parametric value rather than a field variable.

[evilwevel]

add following lines (in red) :

public void deposit(double amount)//this method needs to add to the balance
{
double newBalance=balance+amount;
balance=newBalance;
this.amount = amount;
}
public void withdraw(double amount) {
double newBalance=balance-amount;
balance=newBalance;
this.amount = amount;
}

should work like a charm after that.

[Xtr3m3]

add following lines (in red) :

public void deposit(double amount)//this method needs to add to the balance
{
double newBalance=balance+amount;
balance=newBalance;
this.amount = amount;
}
public void withdraw(double amount) {
double newBalance=balance-amount;
balance=newBalance;
this.amount = amount;
}

should work like a charm after that.[/b]

OMG!!!!! It works great he says "That guy of those forums rocks!!!!! This is so sweet!!!!!"

Thanks evilwevel

[evilwevel]

glad i could help, wasn't a really complicated problem but i know how frustrating it can be to stare at the code while not knowing why it won't work

[Xtr3m3]

EDIT:

Thanks evilwevel for the help...disregard my pm as well

[Amano]

this is the simpleast form of java

and yet.. i failed it 1st year

[evilwevel]

this is the simpleast form of java

and yet.. i failed it 1st year [/b]

i'm about to go down the same road :lol:

but this is indeed the very beginning of java no graphic interface whatsoever, just plain text.

[ChaosFactor]

i'm about to go down the same road :lol:

but this is indeed the very beginning of java no graphic interface whatsoever, just plain text.[/b]

i work with the new ide 6.0 (or 6.whatever the new one w/ graphic interface)
omg thats rough

just trying 2 align a simple row of lbl/txtBox will make you cry

VS ftw

[evilwevel]

our shool teaches in 5.5 so i adapted to that.

the hardest things we had to do so far was to establish a connection with a database and make it communicate. i forgot how many times i wanted to smash my screen, but it happened alot.

[Speed]

any of you tried eclipse europa by any chance... its pretty good, and user friendly