10例子19.txt

这是一本java基础教程 对新手上路有很大帮助

import java.awt.event.*; 
import javax.swing.*;
import java.awt.*;
public class Example10_19{
    public static void main(String args[]){
        new FontWin();
   }
}
class FontWin extends JFrame implements ItemListener{
    JComboBox listFont;
    JTextArea text;
    FontWin(){
       text=new JTextArea(12,12);               
       GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
       String fontName[]=ge.getAvailableFontFamilyNames();
       listFont=new JComboBox(fontName);
       JPanel pNorth=new JPanel();
       pNorth.add(listFont); 
       add(pNorth,BorderLayout.NORTH);
       add(new JScrollPane(text),BorderLayout.CENTER);
       listFont.addItemListener(this);
       setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
       setVisible(true); 
       setBounds(100,120,300,300);
    }
    public void itemStateChanged(ItemEvent e){
       String name=(String)listFont.getSelectedItem();
       Font f=new Font(name,Font.BOLD,32);
       text.setFont(f);
       text.setText("北京奥运");
    }
}