e1305.java

java小程序

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class E1305 extends JFrame implements ItemListener
{
Container c;
JLabel label=new JLabel("字体");
JLabel label1=new JLabel("");
JComboBox cb;
JPanel panel=new JPanel();
public E1305()
{
super("E1305.java:JComboBox测试");
GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fontnames = e.getAvailableFontFamilyNames();
cb=new JComboBox(fontnames);
c=getContentPane();

c.setLayout(new FlowLayout(FlowLayout.CENTER));
c.add(label);
c.add(cb);
c.add(panel);
cb.addItemListener(this);
setSize(250,200);
setVisible(true);
}

public void itemStateChanged(ItemEvent e)
{
label1.setFont(new Font(cb.getSelectedItem().toString(),Font.PLAIN,30));
label1.setText(cb.getSelectedItem().toString());
panel.add(label1);
}

public static void main(String args[])
{
E1305 app=new E1305();
app.addWindowListener(new MyWindowListener());
}
}