test.java

《Java2图形设计卷II：Swing》配套光盘源码

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

public class Test extends JApplet {
	public Test() {
		Container contentPane = getContentPane();
		JToolBar toolbar = new JToolBar();

		String[] tooltipTexts = { 	"new", "open", "cut", "copy",
									"paste" 
		};
					
		ImageIcon[] icons = {	
					new ImageIcon("new.gif"),
					new ImageIcon("open.gif"),
					new ImageIcon("cut.gif"),
					new ImageIcon("copy.gif"),
					new ImageIcon("paste.gif") 
		};

		JButton[] buttons = { 	
			new ButtonWithFixedTooltip(icons[0],tooltipTexts[0]), 
			new ButtonWithFixedTooltip(icons[1],tooltipTexts[1]), 
			new ButtonWithFixedTooltip(icons[2],tooltipTexts[2]), 
			new ButtonWithFixedTooltip(icons[3],tooltipTexts[3]), 
			new ButtonWithFixedTooltip(icons[4],tooltipTexts[4]) 
		};

		for(int i=0; i < buttons.length; ++i) {
			toolbar.add(buttons[i]);

			if(tooltipTexts[i].equals("open"))
				toolbar.addSeparator();
		}
		contentPane.add(toolbar, BorderLayout.NORTH);
	}
}
class ButtonWithFixedTooltip extends JButton { 
	public ButtonWithFixedTooltip(Icon icon, String tooltipText) {
		super(icon);
		setToolTipText(tooltipText);
	}
	public Point getToolTipLocation(MouseEvent e){
		Dimension size = getSize();
		return new Point(0, size.height);
	}
}