Creating objects of alternate classes from within Listener methods.

[JProg]

Hi Everyone,

At the moment I have a GUI class and associated method that contains several buttons. When one of the buttons is pressed I need to create an object from a totally different class.

i.e.:

public class GUI extends JFrame implements ActionListener{

JButton btn1 = new JButton(“Calculate”);

GUIV()
{
Con = getContentPane();

Con.add(btn1);

Btn1.addActionListener(this);

}

public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand().equals(“Calculate”))
{
String str = …;
//Create an object from a totally different class, e.g. CalculateX
//Passing the CalculateX object of the CalculateX class the value
//of String str.
}
}

public void CalculateX{
String Calc = str (…from the GUI class)

If anybody can help with code that does something along these lines it will be greatly appreciated.

Thanks

 

[scrat]

Is this the sort of thing you are wanting?



import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class GUI extends JFrame implements ActionListener {

JButton btn1 = new JButton("Calculate"

GUI()
{
Container c = getContentPane();

c.add(btn1);

btn1.addActionListener(this);

}

public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand().equals("Calculate&quot)
{
String str = "...";
CalculateX myCalculateX = new CalculateX(str);
}
}

class CalculateX {
String str;

CalculateX(String strArg) {
str = strArg;
}
}
}