Why does is not show the radio buttons

Question

I want to display the buttons in a row then radio button in a row under the button and then log scroll pane under the radio buttons. This is my code:
        //Add the buttons and the log to this panel.
        add(buttonPanel, BorderLayout.PAGE_START);
        add(radioPanel, BorderLayout.CENTER);
        add(logScrollPane, BorderLayout.CENTER);When i run it it display the buttons and the logsrollpane. Why does it not display the radio buttons?

Answer 1

Thanks guys.
This is my problem. We have a big system that produce lots of log files and the software testers have to manually have to go through the logs file and look for a certain XML tags in the log file.
What I want to do is help the software testers my developing a small tool that will allow them to open a log file and then click on a radio button corresponding to a xml tags that they are looking for and automatically highlight the tags in the file in yellow color .
I am not sure how feasible this is and I am stuck.
This is what I have done so far.
Can you please guys help me go forward.
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.*;
public class FileChooserDemo extends JPanel
                             implements ActionListener {
    static private final String newline = "\n";
    JButton openButton;
    JButton clearButton;
    JTextArea log;
    JFileChooser fc;
    // Radio Buttons
    static String em01 = "EM01";
    static String em07 = "EM07";
    /*static String dogString = "Dog";
    static String rabbitString = "Rabbit";
    static String pigString = "Pig";*/
    public FileChooserDemo() {
        super(new BorderLayout());
        //Create the radio buttons.
        JRadioButton em01Button = new JRadioButton(em01);
        em01Button.setMnemonic(KeyEvent.VK_B);
        em01Button.setActionCommand(em01);
        em01Button.setSelected(true);
        JRadioButton em07Button = new JRadioButton(em07);
        em07Button.setMnemonic(KeyEvent.VK_C);
        em07Button.setActionCommand(em07);
        //Group the radio buttons.
        ButtonGroup group = new ButtonGroup();
        group.add(em01Button);
        group.add(em07Button);
        //Register a listener for the radio buttons.
        em01Button.addActionListener(this);
        em07Button.addActionListener(this);
        //Put the radio buttons in a column in a panel.
        JPanel radioPanel = new JPanel(new GridLayout(0, 1));
        radioPanel.add(em01Button);
        radioPanel.add(em07Button);       
        //Create the log first, because the action listeners
        //need to refer to it.
        log = new JTextArea(40,60);
        log.setMargin(new Insets(5,5,5,5));
        log.setEditable(false);
        JScrollPane logScrollPane = new JScrollPane(log);
        //Create a file chooser
        fc = new JFileChooser();
        //Uncomment one of the following lines to try a different
        //file selection mode.  The first allows just directories
        //to be selected (and, at least in the Java look and feel,
        //shown).  The second allows both files and directories
        //to be selected.  If you leave these lines commented out,
        //then the default mode (FILES_ONLY) will be used.
        //fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
        //fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
        //Create the open button.  We use the image from the JLF
        //Graphics Repository (but we extracted it from the jar).
        openButton = new JButton("Open File");
        openButton.addActionListener(this);
        //Create the save button.  We use the image from the JLF
        //Graphics Repository (but we extracted it from the jar).
        clearButton = new JButton("Clear Text Area");
        clearButton.addActionListener(this);
        //For layout purposes, put the buttons in a separate panel
        JPanel buttonPanel = new JPanel(); //use FlowLayout
        buttonPanel.add(openButton);
        buttonPanel.add(clearButton);
        //Add the buttons and the log to this panel.
        add(buttonPanel, BorderLayout.PAGE_START);
        add(radioPanel, BorderLayout.LINE_START);
        add(logScrollPane, BorderLayout.CENTER);
    public void actionPerformed(ActionEvent e) {
        //Handle open button action.
        if (e.getSource() == openButton) {
            int returnVal = fc.showOpenDialog(FileChooserDemo.this);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                 log.setText("");
                File file = fc.getSelectedFile();
                try{
                     BufferedReader in = new BufferedReader(new FileReader(file));
                         String data;
                         while ((data = in.readLine()) != null) {
                              log.append(data + newline);
                }catch(IOException ioe){
            log.setCaretPosition(log.getDocument().getLength());
        //Handle save button action.
        }else if (e.getSource() == clearButton) {
              log.setText("");
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("PROGRESS Message Viewer");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //Create and set up the content pane.
        JComponent newContentPane = new FileChooserDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
}