[jdjlist] Re: trying to master Buttons....

Rich Burgis Mon, 24 Feb 2003 07:41:14 -0800

b == setButton should work since == asks if two variables reference the same object. But look into setting the command name or using multiple actionListeners for more flexibility.

From: "Jason Carlamere" <[EMAIL PROTECTED]>
Reply-To: "jdjlist" <[EMAIL PROTECTED]>
To: "jdjlist" <[EMAIL PROTECTED]>
Subject: [jdjlist] Re: trying to master Buttons....
Date: Mon, 24 Feb 2003 08:23:03 -0500
1 more thing

if (b == setButton) wont work

you can say if b instanceof Button

or set the name of setButton to setButton.setName("setButton")

and in the action check on the name
if(b instanceof Button)
      if (b.getName().equals("setButton")
            //then do stuff
Without the wind, the grass does not move. Without software, networks and
hardware are useless
"Tim Nicholson" <tim80 To: "jdjlist" <[EMAIL PROTECTED]> @bigpond.com> cc: Subject: [jdjlist] trying to master Buttons.... 02/24/2003 09:00 AM Please respond to "jdjlist"

Hi list,

I am trying to master Buttons -- and have been having a few problems.

First I have 1 or 2 questions :-
1) What is the difference between a Button and a JButton ? Or in the same
way, between a Frame and a JFrame ?
Button seems to be a class in the java.awt library. But what about if you
put a "J" in front of it ?
2) My problem at the moment is trying to get my Button in the code below to
match up to my expectations. I managed to get a GUI going and to
incorporate a Button into it -- but the problem is that the Button takes up
half of the GUI (the top half). I wanted a nice small Button and in a place
where I could choose to put it. Instead what I got was this huge thing that
takes up half the screen and I have no say as to where I would like to put
it.
Can someone give me some pointers as to how I can modify my code to achieve
what I want ?
//--------------------------------------------------------------------
import java.awt.*;
import java.awt.event.*;
public class File1 extends Frame implements ActionListener{
//button is a GUI component
//GUI (Graphic User Interface
private Button setbutton;

public File1() {

setLayout(new GridLayout(3,2));
 setbutton = new Button("SET");
 add(setbutton);
 setbutton.addActionListener(this);
 setSize(300,100);
 setTitle("Kitchen System");
 setVisible(true);
}//end of constructor
//---------------------------------------------------------------
//actionPerformed
//---------------------------------------------------------------
public void actionPerformed (ActionEvent e) {
 Button b = (Button)e.getSource();
 if (b == setbutton)
 {
}//end of if

}//end of actionPerf
 public static void main(String [] args)
 {
 new File1();
}
}//end of class
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[jdjlist] Re: trying to master Buttons....

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