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();

}

}