?? imageviewerbean.java
字號:
/**
@version 1.21 2001-08-15
@author Cay Horstmann
*/
package com.horstmann.corejava;
import java.awt.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;
/**
A bean for viewing an image.
*/
public class ImageViewerBean extends JLabel
{
public ImageViewerBean()
{
setBorder(BorderFactory.createEtchedBorder());
}
/**
Sets the fileName property.
@param fileName the image file name
*/
public void setFileName(String fileName)
{
try
{
file = new File(fileName);
setIcon(new ImageIcon(ImageIO.read(file)));
}
catch (IOException e)
{
file = null;
setIcon(null);
}
}
/**
Gets the fileName property.
@return the image file name
*/
public String getFileName()
{
if (file == null) return null;
else return file.getPath();
}
public Dimension getPreferredSize()
{
return new Dimension(XPREFSIZE, YPREFSIZE);
}
private File file = null;
private static final int XPREFSIZE = 200;
private static final int YPREFSIZE = 200;
}
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