Java Jpanel_3一直报错,要怎么改啊
package demo;
import java.awt.GridLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class ButtonGridLayout {
public static void main(String[] args) {
JFrame frame = new JFrame("Button Grid Layout");
JPanel jpanel_3 = new JPanel(new GridLayout(2, 3));
JButton button1 = new JButton("农场认养");
JButton button2 = new JButton("农场监控");
JButton button3 = new JButton("养殖数量");
JButton button4 = new JButton("农场直播");
JButton button5 = new JButton("拼团促销");
JButton button6 = new JButton("积分商城");
JLabel backgroud;
ImageIcon img=new ImageIcon("src/img/1.jpg");
backgroud=new JLabel(img);
backgroud.setBounds(0,0,img.getIconWidth(),img.getIconHeight());
final int WIDTH=1000;//宽高
final int HEIGHT=713;
javax.swing.JPanel jpanel_1;//放图片的和其他盘子的
javax.swing.JPanel jpanel_2;//只放标题
javax.swing.JPanel jpanel_3;
jpanel_3.add(button1);
jpanel_3.add(button2);
jpanel_3.add(button3);
jpanel_3.add(button4);
jpanel_3.add(button5);
jpanel_3.add(button6);
jpanel_1.add(backgroud);
frame.add(jpanel_3);
frame.add(jpanel_1);
frame.pack();
frame.setVisible(true);
}
}