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Thread: Weird ActioListener problem

  1. #1
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    Default Weird ActioListener problem

    Hello,

    I seem to have no syntax errors although when adding code it wont execute.

    In the Action performed method i have:

    if(e.getSource() == button1) { System.exit(0); }

    the System.exit(0); will not execute a matter of fact nothing i put in there will... However if i add the code above the if statement it seems to execute. The problem being im having multiple buttons and dont want them all to do the same thing, Here is my code as ive said no errors but the code wont execute.

    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.lang.*;
    /**
     * This program will recieve the IP, PCI and client name of client computers and save them to a text file.
     * 
     * @author Marko Klesnik
     * @version 1.0
     */
     
    public class guiDesign implements ActionListener
    {
     
        // Variable Declarations
        // Declare JButtons
        public JButton btnNew, btnSave, btnFind, btnDelete, btnExit;
     
        // Declare JLabels
        public JLabel lblName, lblIP, lblPCI, lblDesc, lblDesc2, lblDesc3, lblDesc4;
     
        // Declare JTextFields
        public JTextField txtName, txtIP, txtPCI;
     
        // Create a string array
        public String [] clientList;
     
     
        public static void main(String[] args)
            {
                guiDesign test = new guiDesign();
                test.init();
     
            }
     
     
        public void init ()
        {
     
            // Create a string array
            clientList = new String [9];
            clientList [0] = "Please click Find Entry..";
     
            // Declare JList
            JList Selector = new JList ();
            Selector.setSize(90, 90);
            Selector.setBackground(Color.BLACK);
            Selector.setListData (clientList);
     
             // Scrollpane for JList
            JScrollPane ListScrollPane = new JScrollPane(Selector);
            ListScrollPane.setPreferredSize(new Dimension(550,200));
     
            // Define default JButton data
            JButton btnNew = new JButton("New Entry ");
            btnNew.setBackground(Color.BLACK);
            btnNew.setForeground(Color.GREEN);
            JButton btnSave = new JButton("Save Entry");
            btnSave.setBackground(Color.BLACK);
            btnSave.setForeground(Color.GREEN);
            JButton btnFind = new JButton("Find Entry");
            btnFind.setBackground(Color.BLACK);
            btnFind.setForeground(Color.GREEN);
            JButton btnDelete = new JButton("Delete Entry");
            btnDelete.setBackground(Color.BLACK);
            btnDelete.setForeground(Color.GREEN);
            JButton btnExit = new JButton("Exit System");
            btnExit.setBackground(Color.BLACK);
            btnExit.setForeground(Color.RED);
     
            // Define default JLabel data
            JLabel lblName = new JLabel("Client Name:");
            lblName.setForeground(Color.WHITE);
            JLabel lblIP = new JLabel("IP Address:");
            lblIP.setForeground(Color.WHITE);
            JLabel lblPCI = new JLabel("PC Identifier:");
            lblPCI.setForeground(Color.WHITE);
            JLabel lblDesc = new JLabel(" This program will allow the user to add ");
            lblDesc.setForeground(Color.WHITE);
            JLabel lblDesc2 = new JLabel(" edit or delete Users.their PC Identifiers ");
            lblDesc2.setForeground(Color.WHITE);
            JLabel lblDesc3 = new JLabel(" and their PC's IP Address. ");
            lblDesc3.setForeground(Color.WHITE);
            JLabel lblDesc4 = new JLabel(" Please click on the 'Find Entry' button to generate a client list... ");
            lblDesc4.setForeground(Color.WHITE);
     
            //Define default JTextField data
            JTextField txtName = new JTextField("Client1", 10);
            txtName.setBackground(Color.BLACK);
            txtName.setForeground(Color.GREEN);
            JTextField txtIP = new JTextField("", 10);
            txtIP.setBackground(Color.BLACK);
            txtIP.setForeground(Color.GREEN);
            JTextField txtPCI = new JTextField("", 10);
            txtPCI.setBackground(Color.BLACK);
            txtPCI.setForeground(Color.GREEN);
     
            //Create container + Layout
            SpringLayout scnLayout = new SpringLayout();
     
            // Create a frame and apply settings
            JFrame progFrame = new JFrame("[COMPANY NAME] Client Recording Software");
            progFrame.setVisible(true);
            progFrame.setSize(900, 800);
            progFrame.setResizable(false);
     
            // Create a JPanel and apply settings
            JPanel panel1 = new JPanel();
            panel1.setVisible(true);
            panel1.setSize(200, 300);
            panel1.setBackground(Color.black);
            panel1.setLayout(scnLayout);
     
            // Add panels to frame
            progFrame.add(panel1);
     
            // Add components to panels
            panel1.add(lblName);
            panel1.add(txtName);
            panel1.add(btnNew);
     
            panel1.add(lblPCI);
            panel1.add(txtPCI);
            panel1.add(lblIP);
            panel1.add(txtIP);
            panel1.add(btnSave);
            panel1.add(btnFind);
            panel1.add(btnDelete);
            panel1.add(btnExit);
            panel1.add(lblDesc);
            panel1.add(lblDesc2);
            panel1.add(lblDesc3);
            panel1.add(lblDesc4);
            panel1.add(ListScrollPane);
     
            // Set locations of panel1 components
            scnLayout.putConstraint(SpringLayout.WEST, lblName, 350, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, lblName, 200, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, txtName, 200, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, txtName, 35, SpringLayout.EAST, lblName);
            scnLayout.putConstraint(SpringLayout.NORTH, btnNew, 10, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, btnNew, 25, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, lblPCI, 250, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, lblPCI, 350, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, txtPCI, 250, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, txtPCI, 35, SpringLayout.EAST, lblPCI);
            scnLayout.putConstraint(SpringLayout.NORTH, lblIP, 300, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, lblIP, 350, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, txtIP, 300, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, txtIP, 45, SpringLayout.EAST, lblIP);
            scnLayout.putConstraint(SpringLayout.NORTH, btnSave, 10, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, btnSave, 150, SpringLayout.EAST, btnNew);
            scnLayout.putConstraint(SpringLayout.NORTH, btnFind, 10, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.EAST, btnFind, -150, SpringLayout.WEST, btnDelete);
            scnLayout.putConstraint(SpringLayout.NORTH, btnDelete, 10, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.EAST, btnDelete, -25, SpringLayout.EAST, panel1);
            scnLayout.putConstraint(SpringLayout.EAST, btnExit, -25, SpringLayout.EAST, panel1);
            scnLayout.putConstraint(SpringLayout.SOUTH, btnExit, -20, SpringLayout.SOUTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, ListScrollPane, 200, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, ListScrollPane, 150, SpringLayout.SOUTH, txtIP);
            scnLayout.putConstraint(SpringLayout.WEST, lblDesc, 350, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, lblDesc, 80, SpringLayout.NORTH, panel1);
            scnLayout.putConstraint(SpringLayout.WEST, lblDesc2, 350, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, lblDesc2, 10, SpringLayout.SOUTH, lblDesc);
            scnLayout.putConstraint(SpringLayout.WEST, lblDesc3, 385, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, lblDesc3, 10, SpringLayout.SOUTH, lblDesc2);
            scnLayout.putConstraint(SpringLayout.WEST, lblDesc4, 300, SpringLayout.WEST, panel1);
            scnLayout.putConstraint(SpringLayout.NORTH, lblDesc4, -16, SpringLayout.NORTH, ListScrollPane);
     
            btnExit.addActionListener((ActionListener) this.btnExit);
            btnNew.addActionListener(this);
     
        }
     
     
        public void actionPerformed(ActionEvent e)
        {
            //System.exit(0);
           if (e.getSource() == btnExit)  { System.exit(0); }
           //repaint();
           }
     
        }

    Im puzzled lol..


  2. #2
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    Default Re: Weird ActioListener problem

    Quote Originally Posted by macko View Post
    if(e.getSource() == button1) { System.exit(0); }
    There is no button1 in your code. There is a btnExit though. In future post correct code and information to avoid confusion.

    You problem is a common one. You have 2 btnExit variables. An instance one and a local one in your constructor.

  3. The Following User Says Thank You to Junky For This Useful Post:

    macko (May 12th, 2011)

  4. #3
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    Default Re: Weird ActioListener problem

    Oh i had figured it would be something tiny.. and sorry i should of just said the btnExit.

    Thanks for your reply.

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