JPanel jp_background = new JPanel() {
public void paint(Graphics g) {
ImageIcon img = new ImageIcon("soldier/金描.png");
g.drawImage(img.getImage() ,0,0,img.getIconWidth(),img.getIconHeight(),null);
//把frame大小等同于图片大小
frame.this.setSize(img.getIconWidth(), img.getIconHeight());
}
};