记事本中的字体，字形，大小设置。

public class font  implements ActionListener,ListSelectionListener{
  private JTextField textField_1;
  private JTextField textField_2;
  private JTextField textField_3;
  private JList list_1;
  private JList list_2;
  private JList fontList;
  JButton button;
  JButton button_1;
  JLabel label_4;
  private JFrame frame;
  String fontName="宋体";
  int fontStyle=Font.PLAIN, fontSize=12;
  Font font1;
  
  public font(){
   frame=new JFrame();
   frame.getContentPane().setLayout(null);
   frame.setTitle("字体");
      frame.setVisible(true);
   frame.setBounds(100, 100, 425, 330);
  
 

   final JLabel label = DefaultComponentFactory.getInstance().createLabel("字体(F):");
   label.setBounds(10, 0, 62, 18);
   frame.getContentPane().add(label);

   final JScrollPane scrollPane = new JScrollPane();
   scrollPane.setBounds(10, 54, 129, 133);
   frame.getContentPane().add(scrollPane);

   fontList = new JList();
   GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();     
   String[] fonts = ge.getAvailableFontFamilyNames();
   fontList.setListData(fonts);
   scrollPane.setViewportView(fontList);
   fontList.addListSelectionListener(this);

   final JScrollPane scrollPane_1 = new JScrollPane();
   scrollPane_1.setBounds(145, 54, 99, 133);
   frame.getContentPane().add(scrollPane_1);

   list_1 = new JList();
   scrollPane_1.setViewportView(list_1);
      String []fontStyle1={"粗体","斜体","常规","粗斜体"};
      list_1.setListData(fontStyle1);
      list_1.addListSelectionListener(this);

   final JScrollPane scrollPane_2 = new JScrollPane();
   scrollPane_2.setBounds(250, 54, 66, 133);
   frame.getContentPane().add(scrollPane_2);

   list_2 = new JList();
   scrollPane_2.setViewportView(list_2);
   String []size={"12","14","16","18","20","22","24","26","28","36","48","72"};
   list_2.setListData(size);
   list_2.addListSelectionListener(this);

   final JLabel label_1 = new JLabel();
   label_1.setText("字形(Y):");
   label_1.setBounds(146, 0, 66, 18);
   frame.getContentPane().add(label_1);

   final JLabel label_2 = new JLabel();
   label_2.setText("大小(S):");
   label_2.setBounds(250, 0, 66, 18);
   frame.getContentPane().add(label_2);

   button = new JButton();
   button.setText("确定");
   button.setBounds(345, 26, 62, 28);
   frame.getContentPane().add(button);
   button.addActionListener(this);

   button_1 = new JButton();
   button_1.setText("取消");
   button_1.setBounds(345, 80, 62, 28);
   frame.getContentPane().add(button_1);
   button_1.addActionListener(this);

   textField_1 = new JTextField();
   textField_1.setBounds(10, 26, 129, 28);
   frame.getContentPane().add(textField_1);

   textField_2 = new JTextField();
   textField_2.setBounds(145, 24, 99, 28);
   frame.getContentPane().add(textField_2);

   textField_3 = new JTextField();
   textField_3.setBounds(250, 24, 66, 30);
   frame.getContentPane().add(textField_3);

   final JPanel panel = new JPanel();
   panel.setBackground(Color.LIGHT_GRAY);
   panel.setLayout(null);
   panel.setBounds(49, 222, 267, 64);
   frame.getContentPane().add(panel);
   
   final JLabel label_3 = new JLabel();
   label_3.setBounds(10, 198, 56, 20);
   frame.getContentPane().add(label_3);
   label_3.setFont(new Font("", Font.BOLD, 14));
   label_3.setText("示例：");

   label_4 = new JLabel();
   label_4.setBounds(0, 0, 267, 64);
   panel.add(label_4);
   label_4.setText("AaBbCc");

   
  }

  @Override
  public void actionPerformed(ActionEvent e) {
   // TODO Auto-generated method stub
   Object s = e.getSource();
   if (s.equals(button)) {
    textArea.setFont(font1);
    frame.setVisible(false);
    

   } else if (s.equals(button_1)) {
    frame.setVisible(false);
   }
  }

  @Override
  public void valueChanged(ListSelectionEvent e) {
   // TODO Auto-generated method stub
   Object s=e.getSource();
   if(s.equals(fontList)){
    fontName = (String) fontList.getSelectedValue();
    font1 = new Font(fontName, fontStyle, fontSize);
    label_4.setFont(font1);
    textField_1.setText(fontName);
   }else if(s.equals(list_1)){
    int shape;
    String style=list_1.getSelectedValue().toString();
    if(style=="粗体"){
     shape=Font.BOLD;
    }else if(style=="斜体"){
     shape=Font.ITALIC;
    }else if(style=="常规"){
     shape=Font.PLAIN;
    }else{
     shape=Font.BOLD+Font.PLAIN;
    }
    fontStyle=shape;
    font1 = new Font(fontName, fontStyle, fontSize);
    label_4.setFont(font1);
    textField_2.setText(style);
   }else if(s.equals(list_2)){
    String size1=list_2.getSelectedValue().toString();
    fontSize=Integer.parseInt(size1);
    font1 = new Font(fontName, fontStyle, fontSize);
    label_4.setFont(font1);
    textField_3.setText(size1);
   }
  }
  

 }