Hi, my name is WanYee, i need some help on an application i am currently doing, the application is like a calculator to find current resistance and etc... of a series-parallel circuit, my problem here is, if i have 2 buttons named "Series" & "Parallel", when the user clicks on "Series" noting happens first, but when i press the button "Calculate", i want to let my calculate button to use the series formula, how do i let my "Calculate" button knows it. Sorry for my poor explanation.
Note: I am using Swing, NetBeans IDE 6.1! TY, Help is appreciated!
20  2111 
Hi, my name is WanYee, i need some help on an application i am currently doing, the application is like a calculator to find current resistance and etc... of a series-parallel circuit, my problem here is, if i have 2 buttons named "Series" & "Parallel", when the user clicks on "Series" noting happens first, but when i press the button "Calculate", i want to let my calculate button to use the series formula, how do i let my "Calculate" button knows it. Sorry for my poor explanation.
Note: I am using Swing, NetBeans IDE 6.1! TY, Help is appreciated!
Read about ActionListeners and the actionPerformed method.
JosAH 11,448
Recognized Expert MVP
Hi, my name is WanYee, i need some help on an application i am currently doing, the application is like a calculator to find current resistance and etc... of a series-parallel circuit, my problem here is, if i have 2 buttons named "Series" & "Parallel", when the user clicks on "Series" noting happens first, but when i press the button "Calculate", i want to let my calculate button to use the series formula, how do i let my "Calculate" button knows it. Sorry for my poor explanation.
Basically your buttons should be JToggleButtons in a ButtonGroup, i.e. one or
the other should be 'selected'. Your Calculate button should have a registerd
ActionListener that checks which of the two first buttons is selected and perform
the appropriate calculation.
kind regards,
Jos
I know about ActionListener and ActionPerformed, but i do not know how to use the groupButton, i am new to NetBeans, this is actually my school project, and my lecturer asked us to do using NetBeans, which we do not know how to use it, as we use Notepad to learn Java coding, its like so different in NetBeans, so i needed help.
Thank you, help is going to be really appreciated.
I have attached how my GUI looks like, please comment and help me, thanks. 
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Have you tried the advice mentioned by Jos above yet?
Sorry for the bump, i have not tried ButtonGroup, can you like guide me on it, as i am not sure, as i said, my first time using NetBeans, i can't find a guide which really explains on how to use ButtonGroup.
JosAH 11,448
Recognized Expert MVP
Sorry for the bump, i have not tried ButtonGroup, can you like guide me on it, as i am not sure, as i said, my first time using NetBeans, i can't find a guide which really explains on how to use ButtonGroup.
We've collected a couple of useful links; download the API documentation from this page.
kind regards,
Jos
Downloading and will read, if i do not understand hope someone will give me an head start of the code or something.
Thanks.
Jos, Sorry, but i do not still get it on how to use the GroupButton, did you see the attached image i attached, it is the current GUI of my application, i read about the ToggleButton and it says it implements check box and radio button, and in my knowledge, toggle means like the state of 0 when toggled 1 then toggle back to 0 like for binary. Sorry, maybe i am totally all wrong, but i just need a guide on someone to tell me how to do it, to let my calculate button know the state whether is series or parallel last selected.
Ok, i got the idea how to use the ButtonGroup, but i still would like to know how do i implement the ActionListener code? I have made my Series/Parallel button grouped to the ButtonGroup.
JosAH 11,448
Recognized Expert MVP
Ok, i got the idea how to use the ButtonGroup, but i still would like to know how do i implement the ActionListener code? I have made my Series/Parallel button grouped to the ButtonGroup.
.
Good; if you've used the correct buttons you can see that only one of them is
selected; the ButtonGroup takes care of that.
Your ActionListener should be a little class attached to that third button and
passed one of the series/parallel buttons; suppose you give it the series button;
when its actionPerformed() method is called it checks whether or not that
series button is selected and acts accordingly.
kind regards,
Jos
What do you mean by third button? The "Calculate" button? Could you like guide me on a head start for it. And yeah, i noticed only one of the button will be selected when i run it.
JosAH 11,448
Recognized Expert MVP
What do you mean by third button? The "Calculate" button? Could you like guide me on a head start for it.
Yes I mean the 'Calculate' button. Your ActionListener can look like this: -
class Calculate implements ActionPerformed {
-
private AbstractButton ab;
-
//
-
public Calculate(JButton calculate, AbstractButton ab) {
-
this.ab= ab;
-
calculate.addActionListener(this);
-
}
-
//
-
public void actionPerformed(ActionEvent ae) {
-
// calculate something according to the state of ab
-
}
-
}
I think you can manage from here because it's an almost complete giveaway.
kind regards,
Jos
But, where does AbstractButton comes from, or it is just an example, cause now i have them group, my idea was like - if(e.getSource()==jbSeries)
-
{
-
seriescalculations;
-
}
-
else if(e.getSource()==jbParallel)
-
{
-
parallelcalculations;
-
}
JosAH 11,448
Recognized Expert MVP
But, where does AbstractButton comes from, or it is just an example, cause now i have them group, my idea was like
- if(e.getSource()==jbSeries)
-
{
-
seriescalculations;
-
}
-
else if(e.getSource()==jbParallel)
-
{
-
parallelcalculations;
-
}
Why do you want to register an ActionListener to the parallel/series buttons?
Think what a user does: s/he selects one of them (nothing is supposed to happen)
and *then* the user presses the Calculate button. The ActionListener for that
button isn't interested what the user had done before because exactly one of
the parallel/series buttons is selected. The ButtonGroup object took care of that.
All it has to do is inspect which one is selected and perform its calculations.
That's exactly what my class skeleton does and it doesn't care what button you
are using so it uses the upper most super class for that.
kind regards,
Jos
But i don't really know how to use yours, sorry. I am researching on it soon, and NetBeans i can't type codes in it, i have to use set event to it then customize code, or am i coding in the wrong way, please guide me, thanks.
JosAH 11,448
Recognized Expert MVP
But i don't really know how to use yours, sorry. I am researching on it soon, and NetBeans i can't type codes in it, i have to use set event to it then customize code, or am i coding in the wrong way, please guide me, thanks.
Well, research my proposal first then and come back when you have an idea
how it works or should work. Turning proposals down or ignoring them just because
you don't know how they work is not the way to go; the way you're coding now
is completely off track IMHO.
kind regards,
Jos
Yeah, i know, i actually just started learning coding in Java for 2 weeks only, i will do up more research base on what you gave. Thanks, i am desperate because this is a project and the only part i am stuck is this part.
By the way, i stated i am not sure how to do it in NetBeans your way, maybe could you like guide/explain to me, cause NetBeans has so much thing i can't add or edit, i have to customize code to edit the codes.
JosAH 11,448
Recognized Expert MVP
Yeah, i know, i actually just started learning coding in Java for 2 weeks only, i will do up more research base on what you gave. Thanks, i am desperate because this is a project and the only part i am stuck is this part.
By the way, i stated i am not sure how to do it in NetBeans your way, maybe could you like guide/explain to me, cause NetBeans has so much thing i can't add or edit, i have to customize code to edit the codes.
That can't be the meaning of an IDE such as NetBeans. Why don't you simply
edit your .java files using a simple text editor and compile and run your classes
using the 'javac' and 'java' command line tools? Now NetBeans is more of a
hindrance to you than any help.
kind regards,
Jos
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