为什么只能有第一个if语句的功能?后面的语句都没执行,该怎么解决

 /**     *     * 定义注册监听类     *     */    public class RegistBtnActionListener implements ActionListener {        String userName = userNameJtf.getText();        String password = passwordJtf.getText();        String surePassword = surePasswordJtf.getText();        String email = emailJtf.getText();        public void actionPerformed(ActionEvent e){            if(userName.equals("")||password.equals("")||surePassword.equals("")||email.equals("")){                //判断是否没有填写完整                JOptionPane.showMessageDialog(null, "请将空白处填写完整", "提示信息", 2);            }else if (!password.equals(surePassword)){                JOptionPane.showMessageDialog(null, "对不起,前后密码不一致!","提示信息",JOptionPane.ERROR_MESSAGE);                passwordJtf.setText("");                surePasswordJtf.setText("");                return;            } else if (!email                    .matches("^([a-z0-9A-Z]+[-1\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$")) {                JOptionPane.showMessageDialog(null, "对不起,你的邮箱格式不合法!","提示信息",JOptionPane.ERROR_MESSAGE);                emailJtf.setText("");                return;            } else {                JFrameRegist jr=new JFrameRegist();                jr.registConnect("E:\\musicPlatform");                JOptionPane.showMessageDialog(null, "注册成功!","提示信息",1);            }        }    }