Swings

[Lucky Singh]

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

public interface Inter
{
public void methodInter();
}

public class Lucky
{
public static void main(String args[])
{
Lucky lk = new Lucky();
lk.run();
}

public void run()
{
JFrame fm;
JPanel pb, pm;
JSeparator sep;
JTextField txf;
String titlename, authorname;

fm = new JFrame("Welcome!"); // create a new frame.
pb = new JPanel(); // create top panel which has a radio button.
pm = new JPanel();
sep = new JSeparator();
pb.setLayout(new FlowLayout()); // setting layout so can add more
//buttons in future.
class JRadioButton1 extends JRadioButton implements Inter
{
private ActionListener al1 = new ActionListener()
{
public void actionPerformed(ActionEvent e1)
{
txf.setText((JRadioButton)e1.getSource()).getText();
}
};

public JRadioButton1(String header)
{
pb.add(super("One radion button"));
// creating a radio button and adding it to top panel.
}

// implementing method Inter by creating 2 new String objects.
public void methodInter()
{
titlename = new String("Charles Dickens");
authorname = new String("Great Expectations");
}
// want to set these String objects to a text field and display the
// textfield.
txf = new JTextField(titlename + "-" + authorname);
txf.setEditable(false);

pm.add(txf); // adding the textfield to the bottom panel.
Container fc = fm.getContentPane();
fc.add(pm, BorderLayout.SOUTH);// adding both panels to the
//frame.
fc.add(pb, BorderLayout.NORTH);

//end of inner class RadioButton1

fm.setVisible(true);
fm.pack();
}
}//end of class Lucky.

Hi,
Can anyone please tell me whats wrong and how to I correct it?

[Brian Pipa]

Can you tell us what this program is supposed to do? You might have better success if you break this down into a few different classes and try and get each one to compile separately. The way you have them all intermingled is quite confusing. It looks like you could break this into these classes:
Lucky.java
Inter.java
JRadioButton1.java
You should also rename some of the classes/variables ot be more descriptive. An interface named Inter tells me NOTHING.
2nd line: import jav.awt.*; should be import java.awt.*;
[ January 19, 2004: Message edited by: Brian Pipa ]

[Lucky Singh]

Inter is an interphase having one method.
Lucky is a class which has the main method and a run method.
When an instance of Lucky is created in main, we use that to call the run method.
When the run method is called, a frame is created and 2 panels are also created.
A listener is created which will respond when the radio button is clicked.
Within class Lucky there is an inner class called RadioButton1 which extends the JRadioButton class and this implements interphase Inter.
A radio button is created within the constructor of this inner class.
When the radio button is clicked, 2 string objects are created and they are to be displayed in the text field.
Basically, trying out something with inner classes and radio buttons.

[Craig Wood]

I couldn't find much to work with in the code you posted so I made up this example app with inner classes, radio buttons and events.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
 
public class InnerClassTest
{
    public static void main(String[] args)
    {
        LabelPanel labelPanel      = new LabelPanel();
        StylePanel stylePanel      = new StylePanel(labelPanel);
        SelectionPanel selectPanel = new SelectionPanel(labelPanel);
        JFrame f = new JFrame("Inner Class Test");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(stylePanel, "North");
        f.getContentPane().add(labelPanel);
        f.getContentPane().add(selectPanel, "South");
        f.setSize(550,300);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    /**
     * Creates spinners which can modify any label in LabelPanel
     * with foreground and background colors, font and border
     */
    private static class StylePanel extends JPanel
    {
        SpinnerListener spinnerListener = new SpinnerListener();
        LabelPanel labelPanel;
        JSpinner fgSpinner, bgSpinner, fontSpinner, borderSpinner;
 
        public StylePanel(LabelPanel labelPanel)
        {
            this.labelPanel = labelPanel;
            String[] fgColorItems = {
                "red", "black", "orange", "green"
            };
            SpinnerModel fgModel = new SpinnerListModel(fgColorItems);
            fgSpinner = new JSpinner(fgModel);
            Dimension spinnerSize = new Dimension(125, 25);
            fgSpinner.setPreferredSize(spinnerSize);
            fgSpinner.addChangeListener(spinnerListener);
            String[] bgColorItems = {
                "pink", "blue", "darkGray", "magenta"
            };
            SpinnerModel bgModel = new SpinnerListModel(bgColorItems);
            bgSpinner = new JSpinner(bgModel);
            bgSpinner.setPreferredSize(spinnerSize);
            bgSpinner.addChangeListener(spinnerListener);
            String[] fontItems = {
                "bright italic", "regular", "console", "demibold italic"
            };
            SpinnerModel fontModel = new SpinnerListModel(fontItems);
            fontSpinner = new JSpinner(fontModel);
            fontSpinner.setPreferredSize(spinnerSize);
            fontSpinner.addChangeListener(spinnerListener);
            String[] borderItems = {
                "etched", "raised bevel", "lowered bevel", "line"
            };
            SpinnerModel borderModel = new SpinnerListModel(borderItems);
            borderSpinner = new JSpinner(borderModel);
            borderSpinner.setPreferredSize(spinnerSize);
            borderSpinner.addChangeListener(spinnerListener);
            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.weightx = 1.0;
            gbc.insets = new Insets(2,0,2,0);
            add(new JLabel("foreground"), gbc);
            add(new JLabel("background"), gbc);
            add(new JLabel("font"), gbc);
            gbc.gridwidth = gbc.REMAINDER;
            add(new JLabel("border"), gbc);
            gbc.gridwidth = 1;
            add(fgSpinner, gbc);
            add(bgSpinner, gbc);
            add(fontSpinner, gbc);
            gbc.gridwidth = gbc.REMAINDER;
            add(borderSpinner, gbc);
        }
 
        private class SpinnerListener implements ChangeListener
        {
            Color[] fgColors = {
                Color.red, Color.black, Color.orange, Color.green
            };
            Color[] bgColors = {
                Color.pink, Color.blue, Color.darkGray, Color.magenta
            };
            Font[] fonts = {
                new Font("lucida bright italic", Font.PLAIN, 24),
                new Font("lucida sans regular", Font.PLAIN, 24),
                new Font("lucida console", Font.PLAIN, 24),
                new Font("lucida sans demibold italic", Font.PLAIN, 24)
            };
            Border[] borders = {
                BorderFactory.createEtchedBorder(),
                BorderFactory.createRaisedBevelBorder(),
                BorderFactory.createLoweredBevelBorder(),
                BorderFactory.createLineBorder(Color.blue, 4)
            };
 
            public void stateChanged(ChangeEvent e)
            {
                JSpinner spinner = (JSpinner)e.getSource();
                String value = (String)spinner.getValue();
                int index =
                    ((SpinnerListModel)spinner.getModel()).getList().indexOf(value);
 
                if(spinner == fgSpinner)
                    labelPanel.setFgColor(fgColors[index]);
 
                if(spinner == bgSpinner)
                    labelPanel.setBgColor(bgColors[index]);
 
                if(spinner == fontSpinner)
                    labelPanel.setLabelFont(fonts[index]);
 
                if(spinner == borderSpinner)
                    labelPanel.setLabelBorder(borders[index]);
            }
        }
    }
 
    /**
     * Creates and displays labels which can be:
     *     selected with SelectionPanel radio buttons
     *     styled with StylePanel spinners
     */
    private static class LabelPanel extends JPanel
    {
        private JLabel[] labels;
        private JLabel selectedLabel;
 
        public LabelPanel()
        {
            labels = new JLabel[4];
            labels[0] = makeLabel("Label 1", Color.red, Color.yellow);
            labels[1] = makeLabel("Label 2", Color.blue, Color.pink);
            labels[2] = makeLabel("Label 3", Color.green, Color.orange);
            labels[3] = makeLabel("Label 4", Color.yellow, Color.red);
            setBackground(Color.white);
            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.weightx = 1.0;
            gbc.weighty = 1.0;
            gbc.gridwidth = gbc.RELATIVE;
            add(labels[0], gbc);
            gbc.gridwidth = gbc.REMAINDER;
            add(labels[1], gbc);
            gbc.gridwidth = gbc.RELATIVE;
            add(labels[2], gbc);
            gbc.gridwidth = gbc.REMAINDER;
            add(labels[3], gbc);
        }
 
        public void setSelectedLabel(int index)
        {
            selectedLabel = labels[index];
        }
 
        public void setFgColor(Color color)
        {
            selectedLabel.setForeground(color);
            repaint();
        }
 
        public void setBgColor(Color color)
        {
            selectedLabel.setBackground(color);
            repaint();
        }
 
        public void setLabelFont(Font font)
        {
            selectedLabel.setFont(font);
            repaint();
        }
 
        public void setLabelBorder(Border border)
        {
            selectedLabel.setBorder(border);
            repaint();
        }
 
        private JLabel makeLabel(String text, Color fg, Color bg)
        {
            JLabel label = new JLabel(text);
            label.setOpaque(true);
            label.setForeground(fg);
            label.setBackground(bg);
            label.setHorizontalAlignment(JLabel.CENTER);
            label.setFont(new Font("lucida console", Font.PLAIN, 24));
            label.setPreferredSize(new Dimension(140, 40));
            label.setBorder(BorderFactory.createRaisedBevelBorder());
            return label;
        }
    }
 
    /**
     * Radio button panel used to select labels for style changes
     */
    private static class SelectionPanel extends JPanel
    {
       ButtonListener buttonListener = new ButtonListener();
       LabelPanel labelPanel;
       JRadioButton[] radios;
 
        public SelectionPanel(LabelPanel labelPanel)
        {
            this.labelPanel = labelPanel;
            radios = new JRadioButton[4];
            radios[0] = new JRadioButton("label 1");
            radios[1] = new JRadioButton("label 2");
            radios[2] = new JRadioButton("label 3");
            radios[3] = new JRadioButton("label 4");
            ButtonGroup group = new ButtonGroup();
            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.weightx = 1.0;
            gbc.insets = new Insets(3,0,3,0);
            for(int i = 0; i < 4; i++)
            {
                group.add(radios[i]);
                radios[i].addActionListener(buttonListener);
                add(radios[i], gbc);
            }
            setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED,
                                                      Color.red,        // highlight
                                                      Color.magenta));  // shadow
            radios[0].setSelected(true);
            labelPanel.setSelectedLabel(0);
        }
 
        private class ButtonListener implements ActionListener
        {
            public void actionPerformed(ActionEvent e)
            {
                JRadioButton radio = (JRadioButton)e.getSource();
                for(int i = 0; i < radios.length; i++)
                    if(radio == radios[i])
                    {
                        labelPanel.setSelectedLabel(i);
                        break;
                    }
            }
        }
    }
}