ActionListener Difficulty

Question

Hi !!
I'm a student working on an assignment and I'm kind of stuck here, I hope you guys can help!
I'm trying to invoke one class from another through the use of ActionListener Interface.
I've been using a small example to try make it work but haven't been able to:
This is the class that implements the actionlistener for a button:
import javax.swing.*;
import java.awt.event.*;
public class TrialGui implements ActionListener
JButton button;
//private void run ()
// JTextField txt = new JTextField(10);
//frame.getContentPane().add(txt);
//SW nuevaSW = new SW("It works");
public static void main (String[] args)
TrialGui gui = new TrialGui();
gui.go();
public void go()
JFrame frame = new JFrame();
button = new JButton("Click me");
button.addActionListener(this);
frame.getContentPane().add(button);
frame.setSize(300,300);
frame.setVisible(true);
public void actionPerformed (ActionEvent ae)
//button.run();
button.setSize(200,300);
Now, I would like the button rather than to be resized to launch another class when pressed (this other class has been created in a different .java file) . As you can see I've tried creating the run method for launching the other class but it didn't work.
This is the other class I would like to be fired when pressing the button:
import javax.swing.*; // Contains the JFrame, JButton, etc.
import java.awt.*; //Contains the Border Layout
import java.awt.event.*;// package containing ActionListener and ActionEvent
//import java.util.Hashtable; Was being Used with GraphPaperLayout: Couldn't manage to make it work!
public class SW //implements ActionListener
JButton button1;
JButton button2;
JButton button3;
JButton button4;
JButton button5;
JButton button6;
JButton button7;
JButton button8;
// Declare main method
public static void main (String[] args)
/** What can I use to substitute the main. I think that in the programme
* one should not have more than one main method. But I'm not sure what
* to call this method or how it will influence the rest of the code.
// Creates an instance of SecondWindow
SW gui = new SW();
gui.go();
public void go()
// Generate frame and panels + look and feel
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("Campaign Details");
JPanel panel1 = new JPanel(); // To occupy northern region of frame layout
JPanel panel2 = new JPanel(); // To occupy central region of frame layout
JPanel panel3 = new JPanel(); // To occupy southern region of frame layout
GridBagLayout gbl = new GridBagLayout();//Generates layout for panel2
// Generate the necessary buttons
button1 = new JButton("GO");
button2 = new JButton("Edit"); // times 3
/** Can I add the same button (button2) three times to the same panel and yet assign
* each different functions? they would all be edit buttons but
* they will be editing different parametersof the campaign
button3 = new JButton("Add Keywords");
button4 = new JButton("New Campaign");
button5 = new JButton("Log Out");
button6 = new JButton("Refresh");
button7 = new JButton("Edit");
button8 = new JButton("Edit");
// Generate the necessary txtAreas
JTextArea txtArea1 = new JTextArea(1,4);
JTextArea txtArea2 = new JTextArea(1,4);
JTextArea txtArea3 = new JTextArea(1,4);
JTextArea txtArea4 = new JTextArea(1,4);
JTextArea txtArea5 = new JTextArea(1,4);
JTextArea txtArea6 = new JTextArea(1,4);
JTextArea txtArea7 = new JTextArea(1,4);
JTextArea txtArea8 = new JTextArea(1,4);
JTextArea txtArea9 = new JTextArea(1,4);
/** Need to ask whether the data that will be
* downloaded from the google server can be displayed on a
* JTextField or do I need some other thing for displaying it?
* I found the JTextArea but I don't know how appropriate this is.
// Generate the necessary labels
JLabel label1 = new JLabel("Select Campaign:");
JLabel label2 = new JLabel("Impressions:");
JLabel label3 = new JLabel("Clicks:");
JLabel label4 = new JLabel("Budget:");
JLabel label5 = new JLabel("Monthly");
JLabel label6 = new JLabel("Daily");
JLabel label7 = new JLabel("Keywords:");
JLabel label8 = new JLabel("Popularity");
JLabel label9 = new JLabel("Avg.\nCPC");// how do I make it two lines?? /que?
JLabel label10 = new JLabel("Cost");
//Generate the necessary Drop Down Menus
String[] items = {"ApoyoVenezuela", "Other Campaign", "..."};
JComboBox editableCB1 = new JComboBox(items);
//editableCB1.setEditable(true);
String[] items2 = {"Venezuela", "hugo chavez", "ApoyoVenezuela", "..."};
JComboBox editableCB2 = new JComboBox(items2);
//editableCB2.setEditable(true);
// What class can I use to generate these menues???
// Defines format of fonts to be used
Font bigFont = new Font("Courrier New", Font.PLAIN, 12);
Font smallFont = new Font("Courrier New", Font.PLAIN, 9);
Font boldBigFont = new Font("Courrier New", Font.BOLD, 15);
Font boldSmallFont = new Font("Courrier New", Font.BOLD, 10);
// Assign fonts to differet components
button1.setFont(smallFont);
button2.setFont(smallFont);
button3.setFont(bigFont);
button4.setFont(bigFont);
button5.setFont(bigFont);
button6.setFont(bigFont);
button7.setFont(smallFont);
button8.setFont(smallFont);
label1.setFont(bigFont);
label2.setFont(boldBigFont);
label3.setFont(boldBigFont);
label4.setFont(boldBigFont);
label5.setFont(boldSmallFont);
label6.setFont(boldSmallFont);
label7.setFont(boldBigFont);
label8.setFont(boldSmallFont);
label9.setFont(boldSmallFont);
label10.setFont(boldSmallFont);
//Assign ActionListener Fuctionality to buttons
//button1.addActionListener(this);
//button2.addActionListener(this);
//button3.addActionListener(this);
//button4.addActionListener(this);
//button5.addActionListener(this);
//button6.addActionListener(this);
//button7.addActionListener(this);
//button8.addActionListener(this);
// Format frame and panels
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//atmtclly ends Prgmm on clsing the frame
frame.getContentPane().add(BorderLayout.NORTH, panel1);//fit panels inside the frame
frame.getContentPane().add(BorderLayout.CENTER, panel2);
frame.getContentPane().add(BorderLayout.SOUTH, panel3);
panel1.setBackground(Color.yellow); // set panels background colour
panel2.setBackground(Color.blue);
panel3.setBackground(Color.red);
panel2.setLayout(gbl); // Assign gbl layout created above
//Set constraints for gbc
GridBagConstraints gbc = new GridBagConstraints();
//Components spanning three columnsand aligned to the left (west)
gbc.gridwidth = 3;
gbc.anchor = GridBagConstraints.WEST;
gbc.gridx = 0;
gbc.gridy = 1;
gbl.setConstraints(label4, gbc);
panel2.add(label4);
gbc.gridx = 0;
gbc.gridy = 2;
gbl.setConstraints(label2, gbc);
panel2.add(label2);
gbc.gridx = 0;
gbc.gridy = 3;
gbl.setConstraints(label3, gbc);
panel2.add(label3);
gbc.gridx = 0;
gbc.gridy = 4;
gbl.setConstraints(label7, gbc);
panel2.add(label7);
gbc.gridx = 0;
gbc.gridy = 6;
gbl.setConstraints(button3, gbc);
panel2.add(button3);
gbc.gridx = 0;
gbc.gridy = 5;
gbl.setConstraints(editableCB2, gbc);
panel2.add(editableCB2);
//Sets back 2 column spanning and aligns back to the centre
gbc.anchor = GridBagConstraints.CENTER;
gbc.gridwidth = 1;
gbc.gridx = 3;
gbc.gridy = 0;
gbl.setConstraints(label5, gbc);
panel2.add(label5);
gbc.gridx = 4;
gbc.gridy = 0;
gbl.setConstraints(label6, gbc);
panel2.add(label6);
gbc.gridx = 3;
gbc.gridy = 4;
gbl.setConstraints(label8, gbc);
panel2.add(label8);
gbc.gridx = 4;
gbc.gridy = 4;
gbl.setConstraints(label9, gbc);
panel2.add(label9);
gbc.gridx = 5;
gbc.gridy = 4;
gbl.setConstraints(label10, gbc);
panel2.add(label10);
gbc.gridx = 5;
gbc.gridy = 1;
gbl.setConstraints(button2, gbc);
panel2.add(button2);
gbc.gridx = 4;
gbc.gridy = 6;
gbl.setConstraints(button7, gbc);
panel2.add(button7);
gbc.gridx = 5;
gbc.gridy = 6;
gbl.setConstraints(button8, gbc);
panel2.add(button8);
gbc.gridx = 3;
gbc.gridy = 1;
gbl.setConstraints(txtArea1, gbc);
panel2.add(txtArea1);
gbc.gridx = 3;
gbc.gridy = 2;
gbl.setConstraints(txtArea3, gbc);
panel2.add(txtArea3);
gbc.gridx = 3;
gbc.gridy = 3;
gbl.setConstraints(txtArea5, gbc);
panel2.add(txtArea5);
gbc.gridx = 3;
gbc.gridy = 5;
gbl.setConstraints(txtArea7, gbc);
panel2.add(txtArea7);
gbc.gridx = 4;
gbc.gridy = 1;
gbl.setConstraints(txtArea2, gbc);
panel2.add(txtArea2);
gbc.gridx = 4;
gbc.gridy = 2;
gbl.setConstraints(txtArea4, gbc);
panel2.add(txtArea4);
gbc.gridx = 4;
gbc.gridy = 3;
gbl.setConstraints(txtArea6, gbc);
panel2.add(txtArea6);
gbc.gridx = 4;
gbc.gridy = 5;
gbl.setConstraints(txtArea8, gbc);
panel2.add(txtArea8);
gbc.gridx = 5;
gbc.gridy = 5;
gbl.setConstraints(txtArea9, gbc);
panel2.add(txtArea9);
panel1.add(label1);
panel1.add(editableCB1);
panel1.add(button1);
panel3.add(button6);
panel3.add(button4);
panel3.add(button5);
// Set frame dimensions and make it visible
frame.setSize(320,300);
frame.setVisible(true);
//Set actions for the ActionListener enabled buttons
//public void actionPerformed (ActionEvent ae)
//button1.
Thank you very much for your help, I really appreciate it.
Cheers

Answer 1

Thanx for yout pronpt reply!!
I've added
SW sw = new SW();
to the actionPerformed method and it seems to actually invoke the SW class. I've also added the following method to the SW class
public SW()
//build the GUI here, or call a method that builds it from here
SW sw2 = new SW();
but when I run it I get some error which I can't understand. I'm using the cmd to compile and execute and can't read the first lines of teh error. The only line of the error I can see is:
at SW.<init>(SW.java:22)
which keeps on repeating untill I stop the programme from running
To be sincere I'm confused with all this code and I'm no quite sure what method to use to make it work.
Please help!! :-)
Cheers