请问如何做一个类似word的java程序？

字体设置的功能
package jtest;import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import java.awt.event.*;public class FontDialog
    extends JDialog
    implements Constants, ActionListener,ListSelectionListener {  private Frame1 window;
  private Font font;
  private int fontstyle;
  private int fontsize;  private JButton ok;
  private JButton cancel;  private JList fontList;
  private JComboBox chooseSize;  JLabel fontDisplay;  public FontDialog(Frame1 window) {
    super(window, "Font Properties", true);
    this.window = window;
    font = window.getCurrentFont();
    fontstyle = font.getStyle();
    fontsize = font.getSize();    JPanel buttonPane = new JPanel();    buttonPane.add(ok = createButton("OK"));
    buttonPane.add(cancel = createButton("Cancel"));
    this.getContentPane().add(buttonPane,BorderLayout.SOUTH);    JPanel dataPane = new JPanel();
    dataPane.setBorder(BorderFactory.createCompoundBorder(BorderFactory.
        createLineBorder(Color.black),
                       BorderFactory.createEmptyBorder(5, 5, 5, 5)));
    GridBagLayout gbLayout = new GridBagLayout();
    dataPane.setLayout(gbLayout);
    GridBagConstraints constraints = new GridBagConstraints();    JLabel label = new JLabel("Choose a font");
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.gridwidth = GridBagConstraints.REMAINDER;
    gbLayout.setConstraints(label,constraints);
    dataPane.add(label);    GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
    String[] fontnames = e.getAvailableFontFamilyNames();    fontList = new JList(fontnames);
    fontList.setValueIsAdjusting(true);
    fontList.setSelectedIndex(ListSelectionModel.SINGLE_SELECTION);
    fontList.setSelectedValue(font.getFamily(),true);
    fontList.addListSelectionListener(this);
    JScrollPane chooseFont = new JScrollPane(fontList);
    chooseFont.setMinimumSize(new Dimension(300,100));    JPanel display = new JPanel();
    fontDisplay = new JLabel("That is Ali's Virgin Work");
    fontDisplay.setPreferredSize(new Dimension(300,100));    display.add(fontDisplay);    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,true,chooseFont,display);
    splitPane.setOneTouchExpandable(true);
    gbLayout.setConstraints(splitPane,constraints);
    dataPane.add(splitPane);    JPanel sizePane = new JPanel();
    label = new JLabel("Choose point size");
    sizePane.add(label);
    String[] sizeList = {"8","10","12","14","16","18","20","22","24"};
    chooseSize = new JComboBox(sizeList);
    chooseSize.setSelectedItem(Integer.toString(fontsize));
    chooseSize.addActionListener(this);
    sizePane.add(chooseSize);
    gbLayout.setConstraints(sizePane,constraints);
    dataPane.add(sizePane);    JRadioButton bold = new JRadioButton("Bold",(fontstyle & font.BOLD)>0);
    JRadioButton italic = new JRadioButton("italic",(fontstyle & font.ITALIC)>0);
    bold.addItemListener(new StyleListener(Font.BOLD));
    italic.addItemListener(new StyleListener(Font.ITALIC));
    JPanel stylePane = new JPanel();
    stylePane.add(bold);
    stylePane.add(italic);
    gbLayout.setConstraints(stylePane,constraints);
    dataPane.add(stylePane);    getContentPane().add(dataPane,BorderLayout.CENTER);
    this.pack();
    this.setVisible(false);
  }  JButton createButton(String label) {
    JButton button = new JButton(label);
    button.setPreferredSize(new Dimension(80, 20));
    button.addActionListener(this);
    return button;
  }  public void actionPerformed(ActionEvent e) {
    Object source = e.getSource();
    if (source == ok) {
      window.setCurrentFont(font);
      this.setVisible(false);
    }
    else if (source == cancel) {
      this.setVisible(false);
    }
    else if(source == chooseSize) {
      fontsize = Integer.parseInt((String)chooseSize.getSelectedItem());
      font = font.deriveFont((float)fontsize);
      fontDisplay.setFont(font);
      fontDisplay.repaint();
    }
  }  public void valueChanged(ListSelectionEvent e) {
    if(!e.getValueIsAdjusting()) {
      font = new Font((String)fontList.getSelectedValue(),fontstyle,fontsize);
      fontDisplay.setFont(font);
      fontDisplay.repaint();
    }
  }  // ********************************************************
  // ******************** Style Listener ********************
  // ********************************************************
  class StyleListener implements ItemListener {    private int style;    public StyleListener(int style) {
      this.style = style;
    }    public void itemStateChanged(ItemEvent e) {
      if(e.getStateChange() == ItemEvent.SELECTED) {
        fontstyle |= style;
      }
      else
        fontstyle &= ~style;
      font = font.deriveFont(fontstyle);
      fontDisplay.setFont(font);
      fontDisplay.repaint();
    }
  }}