test.java

《Java2图形设计卷II：Swing》配套光盘源码

import java.net.URL;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class Test extends JApplet implements SwingConstants {
	public void init() {
		Container contentPane = getContentPane();
		JComboBox iconTextGap = new JComboBox();
		JPanel controlPanel = new JPanel();
		ImageIcon icon = new ImageIcon("ladybug.gif");

		final JLabel label = new JLabel("Lady Bug", icon, CENTER);

		label.setFont(new Font("Times-Roman", Font.ITALIC, 20));

		iconTextGap.addItem("4"); 
		iconTextGap.addItem("10");
		iconTextGap.addItem("15");
		iconTextGap.addItem("20");
		iconTextGap.addItem("25");

		controlPanel.add(new JLabel("Icon/Text Gap:"));
		controlPanel.add(iconTextGap);

		contentPane.setLayout(new BorderLayout());
		contentPane.add(controlPanel, "North");
		contentPane.add(label, "Center");

		iconTextGap.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent event) {
				JComboBox b = (JComboBox)event.getSource();
				String    s = (String)b.getSelectedItem();
				int       gap = Integer.parseInt(s);
				
				label.setIconTextGap(gap);
			}
		});
	}
}