java对象和ui图片怎么连接在一起的？

在面板上搞一个和面板一样大的JLabel
然后，通过JFileChooser获得路径，利用这个图片的路径，构建一个ImageIcon
最后，根据这个ImageIcon去给JLabel对象setIcon(ImageIcon对象);
具体地：
1.panel.add(label,BorderLayout.CENTER);
2.ImageIcon icon = new ImageIcon(url);
3.label.setIcon(icon);
下面的代码你把 .JPG改成BMP试试看，O(∩_∩)O~
package com.shlq.sample;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class ImagePane extends JPanel
{
JLabel jl = null;
ImageIcon img = null;
public ImagePane()
{
img = new ImageIcon( "E:\\Picture\\1.jpg ");
jl = new JLabel(img);
this.setLayout(new BorderLayout());
this.add(jl, BorderLayout.CENTER);
}
public static void main(String[] args)
{
JFrame test = new JFrame( "Image Pane ");
test.getContentPane().add(new ImagePane());
test.pack();
test.setVisible(true);
test.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}