java：找不到符號

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

public class Test {

public static void main(String[] args) {

JFrame f = new JFrame("西南財經大學職工");

JPanel contentpane = new JPanel();

contentpane.setLayout(new FlowLayout(FlowLayout.LEFT));

ImageIcon icon = new ImageIcon("woker,dif");

JLabel l1 = new JLabel("姓名 職工編號信息");

l1.setIcon(icon);//這裏分開設置

JLabel l2 = new JLabel("妳有哪些興趣愛好？");

JTextField tf = new JTextField("四川省成都市");

JRadioButton rad1 = new JRadioButton("男");

JRadioButton rad2 = new JRadioButton("女");

JCheckBox c1 = new JCheckBox("籃球", false);

JCheckBox c2 = new JCheckBox("音樂", false);

JCheckBox c3 = new JCheckBox("舞蹈", false);

JCheckBox c4 = new JCheckBox("主持", false);

ButtonGroup bg1 = new ButtonGroup();

bg1.add(rad1);

bg1.add(rad2);

JTextArea ta = new JTextArea("個人簡介信息");

contentpane.add(l1);

contentpane.add(tf);

contentpane.add(ta);

contentpane.add(l2);

contentpane.add(rad1);//添加rad就行了,不能添加按鈕組的

contentpane.add(rad2);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.setSize(600, 400);

f.setContentPane(contentpane);

f.setVisible(true);

}

}