JTextField add numbers advice

[thelinuxguy]

Hi

I am working on an atm system. So far I have generally been able to use buttons for selections going through a menu driven system just fine. I have an option which involves the user entering an amount that they would like to withdraw. I have a keypad which shows 12 buttons , 0,1,2,3,4,5,6,7,8,9 ,yes,no. The buttons have been implemented in order to allow the input of the numbers that will form the amount that the user would like to withdraw. I have an issue however. The JTextfield append, setText, getText methods only deal with Strings. I am attempting to add whole numbers. Is there a method by which I can encourage the JTextField methods to take in integers.

I have been trying :-
if(source == i)
{
int val = 1;
otherAmount.append(val);
}
and getting the error message
symbol : method append(int)
location: class javax.swing.JTextField
otherAmount.append(val);

Any help appreciated

TheLinuxGuy

[Fubarable]

did you ever figure out your TextListener issue?

[thelinuxguy]

Hi Fubarable

No sorry I have still not sorted out the TextArea issue. I was leaving it and hoping to just use JtextFields and JButtons for the input and then the JTextArea, soley for display purposes. It seems to be working ok. Although I may take a further look at it later. I believe you were right, the TextListener was awt and not swing.

Thanks for asking
TheLinuxGuy

p.s With regard to my current post, I was just doing some searching an have found an earlier post;-
how to display a sum of all previously pressed numbers in JTextField
which has pretty much resolved my problem. I just use Integer.toString in order to convert my integer to a String. I think it will work. Will post if not.

[StormyWaters]

Are you just appending the number clicked to the JTextField? In that case why would you need to convert it to a Integer until ok is clicked?

if(source == i)
{
int val = 1;
otherAmount.append(val + ""); //This will convert the int value to a String
}

[thelinuxguy]

Hi Stormy Waters

Thanks for your reply, sorry for the late response I, the area had a power cut. I have tried the snippet that you gave me and it works. What I am trying to make is similar to the windows calculator, where if you click 1 then 1 is added to the screen, then if you click 2 the same happens and so fourth for each number. I then hope to take the figure entered in order to use it as a variable value which I can then check against the content of a database, this is for an atm system.

As mentioned the snippet that you gave me has overcome the problem of entering a value into the textfield, I will now try and add further numbers.

Thanks

theLinuxGuy

[thelinuxguy]

Hi Fubarable

In regard to TextListeners I have not researched these further. However I think it may be possible to overcome the problem I was having with the use of a code snippet that StormyWaters has given me. Rather than using JTextFields I am able to use JTextAreas as I initially intended, as with the use of:-
otherAmount.append(val + "");

I am able to add values without an error being displayed.

theLinuxGuy

[CJSLMAN]

Read following post...

[CJSLMAN]

Just a brief comment here... what Stromy suggested works (quick and dirty), but the the correct and formal way would be:

otherAmount.append(String.valueOf(val));

Like I said Stormy's suggestion works (maybe a little hard to read), but using the correct methods is the perfered way.

Luck,
CJSL

[thelinuxguy]

hi CJSLMAN

Thank you for the code snippet and I will try it in just a minute. I have managed with the help of the code provided by StormyWaters to do what I was intending to do. I have entered numbers into a JtextArea, and then read these numbers as a String using the getText method. I then had to take the String an turn it into an integer to initialise a variable for further use. I found a very useful snippet on another site:- Converting String to Integer - bytes, which has showed me how to do this. For anyones interest in order to take a String and turn it into an integer use the following syntax.

int i = Integer.parseInt("123");

or in my case it was:-
String get = displayArea.getText();
int geti = Integer.parseInt(get);

This gave me the desired outcome.

Regards

theLinuxGuy

[thelinuxguy]

Hi

displayArea.append(String.valueOf(val));

works perfectly!