Using Method in If-statement

Question

Hi!

I would like to use an if-statement that will execute a code if a button is clicked, but I can't do the following:

if (buttonplus_Click = true)

{

//code

}

Is there any other way?

Answer 1

Unfortunately not as simple as that...

First , You create a Button object

Then you write the method that gets called when the button is clicked...

this is called a click event handler

Finally, you have to connect them with an EventListener, an object

that associates the click event with the method that is called

This is done different ways depending on your user interface...

Here is a java program that creates a Form Panel containing a button

that says "HELLO" when clicked

===========================

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class MyWindow

{

static JFrame frame;

public static void main(String[] args)

{

// schedule this for the event dispatch thread (edt)

SwingUtilities.invokeLater(new Runnable()

{

public void run()

{

displayJFrame();

}

});

}

static void displayJFrame()

{

frame = new JFrame("Our JButton listener example");

// create our jbutton

JButton showDialogButton = new JButton("Click Me");

// add the listener to the jbutton to handle the "pressed" event

showDialogButton.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

// display/center the jdialog when the button is pressed

JDialog d = new JDialog(frame, "Hello", true);

d.setLocationRelativeTo(frame);

d.setVisible(true);

}

});

// put the button on the frame

frame.getContentPane().setLayout(new FlowLayout());

frame.add(showDialogButton);

// set up the jframe, then display it

frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

frame.setPreferredSize(new Dimension(300, 200));

frame.pack();

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

}