一个Jlist控件应用的小例子

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

public class Test extends JFrame implements ListSelectionListener{
  JList jlName,jlSize;
  JLabel lbl;
  String [] strSize={"9","10","12","14","16","18","20","22","24","26","28","30","32"};
 
  public Test(){
    jlName=new JList();
    setTitle("设置字体示例");
    lbl=new JLabel("字体示例Simple Text",JLabel.CENTER);
    GraphicsEnvironment env=GraphicsEnvironment.getLocalGraphicsEnvironment();
    String [] strName=env.getAvailableFontFamilyNames();
    jlName.setListData(strName);
    jlSize=new JList(strSize);
   
   
    JScrollPane js=new JScrollPane();
    js.getViewport().add(jlName);

    Container con=getContentPane();
    con.setLayout(new BorderLayout());
    con.add(lbl,BorderLayout.NORTH);
    JPanel p=new JPanel();
    con.add(p);
    p.setLayout(new GridLayout(1,2));
    p.add(js);
    p.add(jlSize);
    jlName.addListSelectionListener(this);
    jlSize.addListSelectionListener(this);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(600,400);
    setVisible(true);
  }
 
  public void valueChanged(ListSelectionEvent e){
    if(e.getSource()==jlName){
      String name=(String)jlName.getSelectedValue();
      Font f=lbl.getFont();
      Font newFont=new Font(name,f.getStyle(),f.getSize());
      lbl.setFont(newFont);
    }
    else if(e.getSource()==jlSize){
      int size=Integer.parseInt((String)jlSize.getSelectedValue());
      Font f=lbl.getFont();
      Font newFont=new Font(f.getName(),f.getStyle(),size);
      lbl.setFont(newFont);
    }
  }
 
  public static void main(String args[]){
    new Test();
  }
}