Re: Java Programming Help (conversions)

From:
Josh Kelm <jpkelm1@gmail.com>
Newsgroups:
comp.lang.java.gui
Date:
Mon, 29 Mar 2010 13:18:29 -0700 (PDT)
Message-ID:
<11ee4d3b-741b-4c07-aa56-da12850262c3@b33g2000yqc.googlegroups.com>

 Murph25 <jxms...@mail.rmu.edu> wrote:

I am currently writing a program which will perform binary to
decimal, decimal to binary, hexadecimal to decimal, decimal to
hexadecimal conversions, 1's complement, 2's complement, and show the
list of boolean algebra rules.

I have created the GUI however, I cannot figure out how to make the
Jbuttons generate the coding needed for a binary to decimal
conversion of the input in the corresponding JTextField. Please help
me. The code is below:


...
        button7.addActionListener(new Action7());
        frame.pack();
        frame.setVisible(true);
    }
...


There are a couple ways you can do it. Here is a sample program that
demonstrates actions on buttons (the dummy button doesn't do anything
just to show you that one has an action mapped, the other doesn't):

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

public class TestButton implements ActionListener{

    private JButton button;
    private JButton dummyButton;

    public TestButton(){

        button = new JButton("test");
        button.addActionListener(this);

        dummyButton = new JButton("dummy test");

        JFrame frame = new JFrame("Test Button");

        frame.setLayout(new FlowLayout(FlowLayout.LEFT));
     frame.add(button);
     frame.add(dummyButton);

     frame.pack();
     frame.setVisible(true);
    }

    public void actionPerformed(ActionEvent e){

        if (e.getSource() == button){
            System.out.println("button clicked");
        }
    }

    public static void main(String[] args){
     TestButton tb = new TestButton();
    }
}

http://www.javaprogrammingforums.com/java-code-snippets-tutorials/278-how-a=
dd-actionlistener-jbutton-java-swing.html
also has another method of doing it that you may find cleaner.
Hopefully this is what you are looking for.

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