Problem in using Font class

Question

In this code i try to make font preview on the word "Test" by selecting font name , style and size
but when i select font name and style the word " Test" disappear
why ??
please say to me the correct way to do this .
my code :
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
class FontClass extends JDialog {
    Box mainComBoxPanel = Box.createHorizontalBox();
    JPanel comfontpanel, comfontstaylePanel, comsizeFontpanel, mainSamplePanel, samplePanel, mainPanel, applayPanel, mainApplayPanel;
    JLabel labelFont, labelFontstyle, labelSize, sampleLabel;
    TitledBorder titleSample, fontProperties;
    JComboBox comboBoxFont, comboBoxFontstyle, comboBoxFontSize;
    JButton applayButton, canelButton;
    String[] font;
    int[] fontStyle = {Font.BOLD, Font.ITALIC, Font.BOLD | Font.ITALIC};
    String[] fontNames = {"Bold", "Italic", "BoldItalic"};
    String[] sizeFont = {"20", "22", "24", "26", " 28", "36", "48", "72"};
    public FontClass() {
        font = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
        comboBoxFont = new JComboBox(font);
        IntializePanel();
        IntializeLapel();
        //applay panel contain ok & applay buttons
        applayPanel.setLayout(new GridLayout(2, 1));
        applayButton = new JButton("applay");
        canelButton = new JButton("cancel");
        applayPanel.add(applayButton);
        applayPanel.add(canelButton);
        mainApplayPanel.setBackground(Color.BLUE);
        mainApplayPanel.add(applayPanel);
        // panels for comboBox
        comfontpanel.setLayout(new GridLayout(2, 1));
        comfontstaylePanel.setLayout(new GridLayout(2, 1));
        comsizeFontpanel.setLayout(new GridLayout(2, 1));
        // sampel panel for previewing font properties
        titleSample = BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.BLACK, 3), "sample");
        samplePanel.setBorder(titleSample);
        sampleLabel.setText("Test");
        samplePanel.setBackground(Color.BLUE);
        samplePanel.add(sampleLabel);
        comboBoxFontstyle = new JComboBox();
        for (int i = 0; i < fontStyle.length; ++i) {
            comboBoxFontstyle.addItem(fontNames);
comboBoxFontSize = new JComboBox();
for (int i = 0; i < sizeFont.length; ++i) {
comboBoxFontSize.addItem(sizeFont[i]);
comfontpanel.add(labelFont);
comfontpanel.add(comboBoxFont);
comfontstaylePanel.add(labelFontstyle);
comfontstaylePanel.add(comboBoxFontstyle);
comsizeFontpanel.add(labelSize);
comsizeFontpanel.add(comboBoxFontSize);
comfontpanel.setPreferredSize(new Dimension(40, 40));
comfontstaylePanel.setPreferredSize(new Dimension(40, 40));
comsizeFontpanel.setPreferredSize(new Dimension(40, 40));
fontProperties = BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.BLACK, 5), "Font properties");
mainComBoxPanel.setBorder(fontProperties);
mainComBoxPanel.add(comfontpanel);
mainComBoxPanel.add(Box.createHorizontalStrut(10));
mainComBoxPanel.add(comfontstaylePanel);
mainComBoxPanel.add(Box.createHorizontalStrut(10));
mainComBoxPanel.add(comsizeFontpanel);
mainComBoxPanel.add(Box.createHorizontalGlue());
samplePanel.setPreferredSize(new Dimension(200, 100));
mainSamplePanel.add(samplePanel);
mainPanel.setLayout(new BorderLayout());
mainPanel.add(mainComBoxPanel, BorderLayout.NORTH);
mainPanel.add(mainSamplePanel, BorderLayout.SOUTH);
mainPanel.add(mainApplayPanel, BorderLayout.EAST);
getContentPane().add(mainPanel);
comboBoxFont.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
String newFontName = (String) comboBoxFont.getSelectedItem();
sampleLabel.setFont(new Font(newFontName, WIDTH, WIDTH));
comboBoxFontstyle.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
int newFontStyle = fontStyle[comboBoxFontstyle.getSelectedIndex()];
sampleLabel.setFont(new Font(null, newFontStyle, WIDTH));
comboBoxFontSize.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
int newFontSize = Integer.parseInt((String) comboBoxFontSize.getSelectedItem());
sampleLabel.setFont(new Font(null, WIDTH, newFontSize));
private void IntializePanel() {
mainPanel = new JPanel();
comfontpanel = new JPanel();
comfontstaylePanel = new JPanel();
comsizeFontpanel = new JPanel();
mainSamplePanel = new JPanel();
samplePanel = new JPanel();
mainApplayPanel = new JPanel();
applayPanel = new JPanel();
private void IntializeLapel() {
labelFont = new JLabel("Font:");
labelFontstyle = new JLabel("Font Style:");
labelSize = new JLabel("Size:");
sampleLabel = new JLabel("Test");
public static void main(String[] args) {
FontClass fontClass = new FontClass();
fontClass.setSize(new Dimension(500, 400));
fontClass.setLocationRelativeTo(null);
fontClass.setVisible(true);
fontClass.setResizable(false);

Answer 1

Add a single item listener to all your combo boxes:
        ItemListener itemListener=new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                String selectedFontName = (String) comboBoxFont.getSelectedItem();
                int selectedfontStyle = fontStyle[comboBoxFontstyle.getSelectedIndex()];
                int selectedfontSize = Integer.parseInt((String) comboBoxFontSize.getSelectedItem());
                sampleLabel.setFont(new Font(selectedFontName, selectedfontStyle, selectedfontSize));
        comboBoxFont.addItemListener(itemListener);
        comboBoxFontstyle.addItemListener(itemListener);
        comboBoxFontSize.addItemListener(itemListener);By the way, have tried searching for 'Swing Font Chooser' on Google?
Thanks!