把一个图片设置成Frame的背景,该重写哪个方法?
我试着重写了paint(Graphics)方法,图片是设成背景了,不过上面的Button等组件就看不到了.
import   javax.swing.*;
import   java.awt.*;
import   java.awt.event.*;
class   Back   extends   JFrame
{
ImageIcon   img;

public   Back()throws   Exception
{
super( "abc ");
setLayout(new   FlowLayout());
add(new   JButton( "skajdfsd "));
img=new   ImageIcon(getClass().getResource( "2.jpg "));
this.addWindowListener(new   WindowAdapter(){
public   void   windowClosing(WindowEvent   e)
{
System.exit(0);
}
});
pack();
System.out.println(img.getIconWidth()+ "   "+img.getIconHeight());
setVisible(true);
}
public   void   paint(Graphics   g)
{
super.setSize(216,244);
g.drawImage(img.getImage(),0,0,getWidth(),getHeight(),this);
}
public   static   void   main(String...dd)   throws   Exception
{
new   Back();
}
}

------解决方案--------------------
panel上面考虑一下