数据库选修课程管理系统.docVIP

package yangxu; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.table.AbstractTableModel; import java.applet.Applet; import java.applet.AudioClip; import java.io.*; import java.net.MalformedURLException; import java.net.URI; import java.net.URL; import java.sql.*; import sun.audio.*; public class Main { public static void main(String[] args){ new Login(); try { File f= new File(D://音乐//logic.mid); URI u =f.toURI(); URL r = null; r = u.toURL(); AudioClip m=Applet.newAudioClip(r); m.loop(); } catch (MalformedURLException e) { // TODO Auto-generated catch bloc e.printStackTrace(); } } } class Login extends JFrame{ JLabel lLogin,lKey,lLoginInform; JTextField textLogin,textKey; JPasswordField passField; JButton bLogin,bCancel; Choice identify; public Login(){ setTitle(选修课程管理系统); int width = getWidth(); int height =getHeight(); int w = (Toolkit.getDefaultToolkit().getScreenSize().width -width )/ 2; int h = (Toolkit.getDefaultToolkit().getScreenSize().height-height) / 2; setLocation(w, h); setLayout(new FlowLayout(FlowLayout.CENTER,100,25)); lLoginInform=new JLabel(登陆身份：); identify = new Choice(); identify.add(学生); identify.add(教师); identify.add(管理员); add(lLoginInform); add(identify); lLogin=new JLabel(账 号：); add(lLogin); textLogin=new JTextField(,7); add(textLogin); lKey=new JLabel(密 码：); add(lKey); passField = new JPasswordField(7); add(passField); bLogin=new JButton(登陆); bLogin.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){ boolean flag; if(identify.getSelectedItem().equals(学生)(textLogin.getText()).equals(student) ){ char pass[] = passField.getPassword(); for(int i =0;i6;){