java中JLabel设置背景图片

 先贴代码，再看注释；//显示图片的JLabel
ImageIcon background =new ImageIcon(test.class.getResource("jpanel_pci.jpg"));//test为当前的类，jpanel_pci.jpg自动添加到当前项目的包中
background.setImage(
background.getImage().
getScaledInstance(background.getIconWidth(),background.getIconHeight(), Image.SCALE_DEFAULT));
/****
* @author Administrator
* getScaledInstance(width,height,hints);//width,height,hints为方法中的参数
* width the width to which to scale the image.
* height the height to which to scale the image.
* hints flags to indicate the type of algorithm to use for image resampling.//指示用于图像重新取样的算法类型的标志，指定缩放的比例算法
*/
JLabel picJLabel=new JLabel();
System.out.println(background.getIconHeight() + " " + background.getIconWidth());
picJLabel.setBounds(640, 80, 350, 222);
picJLabel.setIcon(background);
picJLabel.setHorizontalAlignment(0);

<pre name="code" class="java">          //最后在JFrame中添加JLabel
this.add(picJLabel);

大概就这么一些，还有JFrame的添加图片的，也是不是很熟悉，稍后写。