我想在Frame上面添加图片,请问一下怎么做??我是想让个图片做背景用的?

我想在Frame上面添加图片,请问一下怎么做??我是想让个图片做背景用的?

File file = new File("F:/tupian/Blue hills.jpg");
try {
Image image = ImageIO.read(file);
ImageIcon icon = new ImageIcon(image);
JLabel label = new JLabel(icon);
label.setBounds(0,0,icon.getIconWidth(),icon.getIconHeight());
JFrame.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));
((JPanel)JFrame.getContentPane()).setOpaque(false);
} catch (IOException ex) {
ex.printStackTrace();
}

'frame本身不具备背景图片功能 '以下是我用api做的一个例子 '本来打算用loadimage做，不过loadpicture支持的图片格式多一点。 'frame控件没有autoredraw属性，所以我在form_paint里加了一些代码，解决了最小化窗体后图片消失的问题。（还有个问题：改变窗体大小的时候如果窗体覆盖图片区域会使图片消失，解决办法明天附上，太晚了，睡觉。） private declare function selectobject lib "gdi32" (byval hdc as long, byval hobject as long) as long private declare function createcompatibledc lib "gdi32" (byval hdc as long) as long private declare function deletedc lib "gdi32" (byval hdc as long) as long private declare function bitblt lib "gdi32" (byval hdestdc as long, byval x as long, byval y as long, byval nwidth as long, byval nheight as long, byval hsrcdc as long, byval xsrc as long, byval ysrc as long, byval dwrop as long) as long private declare function getdc lib "user32" (byval hwnd as long) as long private declare function releasedc lib "user32" (byval hwnd as long, byval hdc as long) as long dim fwidth as integer, fheight as integer private sub form_load() me.show doevents call framedimg(frame1, "d:\壁纸\080505081302_5.jpg") end sub private sub form_paint() if me.width = fwidth and me.height = fheight then doevents call framedimg(frame1, "d:\壁纸\080505081302_5.jpg") else fwidth = me.width fheight = me.height end if end sub private sub framedimg(oframe as object, imgfilepath as string) 'framedimg(控件名称,图片文件的路径) dim frmdc as long, imgdc as long dim pbmp as ipicturedisp set pbmp = loadpicture(imgfilepath) imgdc = createcompatibledc(0) selectobject imgdc, pbmp.handle frmdc = getdc(oframe.hwnd) bitblt frmdc, 0, 0, oframe.width, oframe.height, imgdc, 0, 0, vbsrccopy set pbmp = nothing deletedc imgdc releasedc oframe.hwnd, frmdc end sub