imagemap.java

来自「打包一些Java学习课件及附带的源代码」· Java 代码 · 共 46 行

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

public class ImageMap extends JApplet{
	private static final String captions[]={"cool","shy","cry","angry"};
	private ImageIcon mapImage[]=new ImageIcon[4];
	private static int xmapIcon,ymapIcon;
	public void init()
	{
		for(int i=0;i<4;i++)
			mapImage[i]=new ImageIcon(captions[i]+".gif");
		xmapIcon=mapImage[0].getIconWidth();
		ymapIcon=mapImage[0].getIconHeight();	
		addMouseListener(new MouseAdapter(){
			public void mouseExited(MouseEvent event)
			{
				showStatus("Pointer outside applet");
			}
		});
		
		addMouseMotionListener(
			new MouseMotionAdapter(){
				public void mouseMoved(MouseEvent e)
				{
					showStatus(calculateLocation(e.getX(),e.getY()));
				}
			});
	}
		public void paint(Graphics g)
		{
			super.paint(g);
			
			for(int i=0;i<4;i++)
				mapImage[i].paintIcon(this,g,i*xmapIcon,0);
		}
		
		public String calculateLocation(int x,int y)
		{
			if(x>=xmapIcon*4||y>=ymapIcon)
				return("");
			return(captions[x/xmapIcon]);
		}
}