📄 网上选课系统.java
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<td height="36" align="center" valign="middle" bgcolor="#FFFFFF" style="word-break:break-all" class="title"><strong>网上选课系统.java</strong></td>
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<td height="40" align="right" valign="middle" bgcolor="#FFFFFF" style="word-break:break-all">作者：未知
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<td height="623" align="left" valign="top" class="content"> import java.awt.*;<br>import java.awt.event.*;<br>import java.util.*;<br>class p1 extends Panel<br>{<br> Label l1;<br> Font f=new Font("宋体",Font.BOLD,20);<br> p1()<br> {<br> setLayout(new GridLayout(1,1));<br> l1=new Label("网上选课记录系统",Label.CENTER);<br> l1.setFont(f);<br> add(l1);<br> }<br>}<br>class p2 extends Panel<br>{<br> Label l1,l2;<br> TextField t1,t2;<br> p2()<br> {<br> setLayout(new GridLayout(1,4));<br> l1=new Label("姓名",Label.CENTER);<br> l2=new Label("学号",Label.CENTER);<br> t1=new TextField(10);<br> t2=new TextField(10);<br> add(l1);<br> add(t1);<br> add(l2);<br> add(t2);<br> }<br>}<br>class p3 extends Panel<br>{<br> Label l1,l2;<br> TextField t1,t2;<br> p3()<br> {<br> setLayout(new GridLayout(1,4));<br> l1=new Label("专业",Label.CENTER);<br> l2=new Label("所属院(系)",Label.CENTER);<br> t1=new TextField(10);<br> t2=new TextField(10);<br> add(l1);<br> add(t1);<br> add(l2);<br> add(t2);<br> }<br>}<br>class p4 extends Panel<br>{<br> Label l1;<br> Button btn1;<br> Button btn2;<br> Button btn3;<br> Font f=new Font("宋体",Font.BOLD,20);<br> p4()<br> {<br> setLayout(new GridLayout(1,4));<br> l1=new Label("请选择您要选修的课程并确认",Label.CENTER);<br> btn1=new Button("查询");<br> btn2=new Button("确认");<br> btn3=new Button("退出系统");<br> add(l1);<br> add(btn1);<br> add(btn2);<br> add(btn3);<br> }<br>}<br>class p5 extends Panel<br>{<br> List list ;<br> p5()<br> {<br> setLayout(new GridLayout(1,1));<br> list=new List(8,true);<br> list.add("大学英语");<br> list.add("计算机图形学");<br> list.add("JAVA语言");<br> list.add("高等数学");<br> list.add("数据结构");<br> list.add("单片机");<br> list.add("网络应用与开发");<br> list.add("概率论与数理统计");<br> list.add("管理学概论");<br> list.add("数据库概论");<br> list.add("英语听力");<br> list.add("VC++");<br> list.add("商务英语");<br> list.add("会计学");<br> list.add("经济学");<br> list.add("计算机网络");<br> add(list);<br> }<br>}<br>class p6 extends Panel<br>{<br> TextArea ta;<br> p6()<br> {<br> setLayout(new GridLayout(1,1));<br> ta=new TextArea(8,30);<br> add(ta);<br> }<br>}<br>class p8 extends Panel<br>{<br> Label l1,l2,l3;<br> Label l4,l5,l6,l7,l9;<br> Panel p11,p22,p33,p44,p55;<br> TextField t1,t2;<br> Button btn;<br> p8()<br> {<br> p11=new Panel();<br> p22=new Panel();<br> p33=new Panel();<br> p44=new Panel();<br> p55=new Panel();<br> p11.setLayout(new GridLayout(1,1));<br> p22.setLayout(new GridLayout(1,1));<br> p33.setLayout(new GridLayout(1,4));<br> p44.setLayout(new GridLayout(1,4));<br> p55.setLayout(new GridLayout(1,1));<br> l4=new Label("");<br> l5=new Label("");<br> l6=new Label("");<br> l7=new Label("");<br> l9=new Label("");<br> l1=new Label("欢迎来到网上选课系统",Label.CENTER);<br> Font f=new Font("宋体",Font.BOLD,30);<br> l1.setFont(f);<br> l2=new Label("请输入管理员帐号",Label.CENTER);<br> l3=new Label("请输入管理员密码",Label.CENTER);<br> setBackground(Color.lightGray); <br> btn=new Button("确定");<br> t1=new TextField(20);<br> t2=new TextField(15);<br> t2.setEchoChar(´*´);<br> l1.setForeground(Color.magenta);<br> t1.setBackground(Color.cyan);<br> t2.setBackground(Color.cyan);<br> t1.setForeground(Color.red);<br> t2.setForeground(Color.red);<br> l2.setForeground(Color.blue);<br> l3.setForeground(Color.blue);<br> p11.add(l1);<br> p22.add(l4);<br> p33.add(l5);<br> p33.add(l2);<br> p33.add(t1);<br> p33.add(l6);<br> p44.add(l7);<br> p44.add(l3);<br> p44.add(t2);<br> p44.add(btn);<br> p55.add(l9);<br> setLayout(new GridLayout(5,1));<br> add(p11);<br> add(p22);<br> add(p33);<br> add(p44);<br> add(p55);<br> <br> }<br>}<br>class p9 extends Panel<br>{<br> p1 pn1=new p1();<br> p2 pn2=new p2();<br> p3 pn3=new p3();<br> p4 pn4=new p4();<br> p5 pn5=new p5();<br> p6 pn6=new p6();<br> p9()<br> {<br> setLayout(new GridLayout(6,1));<br> add(pn1);<br> add(pn2);<br> add(pn3);<br> add(pn4);<br> add(pn5);<br> add(pn6);<br> }<br>}<br> class user<br>{<br> String username;<br> String sd;<br> String major;<br> String institute;<br> String course;<br> user(String x1,String x2,String x3,String x4,String x5)<br> {<br> username=x1;<br> sd=x2;<br> major=x3;<br> institute=x4;<br> course=x5;<br> }<br>}<br>public class www<br>{<br> public static void main(String args[])<br> {<br> new m();<br> }<br>}<br>class m extends Frame implements ActionListener,ItemListener<br>{<br> StringBuffer ss=new StringBuffer("您好!您选修的课程有:");<br> Vector xiang=new Vector();<br> p9 pn9; <br> p8 pn8;<br> CardLayout cc=new CardLayout();<br> Button btn1; <br> Dialog d1;<br> m()<br> {<br> super("网上选课");<br> pn8=new p8();<br> pn9=new p9();<br> setLayout(cc);<br> add("one",pn8);<br> add("two",pn9);<br> btn1=new Button("确定");<br> pn9.pn1.l1.setBackground(Color.pink);<br> pn9.pn1.l1.setForeground(Color.blue);<br> pn9.pn2.l1.setBackground(Color.gray);<br> pn9.pn2.l1.setForeground(Color.orange);<br> pn9.pn2.l2.setBackground(Color.gray);<br> pn9.pn2.l2.setForeground(Color.orange);<br> pn9.pn3.l1.setBackground(Color.gray);<br> pn9.pn3.l1.setForeground(Color.orange);<br> pn9.pn3.l2.setBackground(Color.gray);<br> pn9.pn3.l2.setForeground(Color.orange);<br> pn9.pn2.t1.setForeground(Color.red);<br> pn9.pn2.t1.setBackground(Color.cyan);<br> pn9.pn2.t2.setForeground(Color.red);<br> pn9.pn2.t2.setBackground(Color.cyan);<br> pn9.pn3.t1.setForeground(Color.red);<br> pn9.pn3.t1.setBackground(Color.cyan);<br> pn9.pn3.t2.setForeground(Color.red);<br> pn9.pn3.t2.setBackground(Color.cyan);<br> pn9.pn5.list.setBackground(Color.pink);<br> pn9.pn5.list.setForeground(Color.blue);<br> pn9.pn6.ta.setBackground(Color.blue);<br> pn9.pn6.ta.setForeground(Color.white);<br> pn9.pn4.btn1.addActionListener(this);<br> pn9.pn4.btn2.addActionListener(this); <br> pn9.pn4.btn3.addActionListener(this);<br> pn9.pn5.list.addActionListener(this);<br> (pn9.pn5.list).addItemListener(this);<br> pn8.btn.addActionListener(this);<br> btn1.addActionListener(this); <br> setSize(650,400);<br> show();<br> }<br> public void actionPerformed(ActionEvent e)<br> {<br> xiang.addElement(new user("马先生","23597483","计算机","计算机系","单片机，数学"));<br> xiang.addElement(new user("杨先生","7899452","计算机","计算机系","单片机，数学"));<br> xiang.addElement(new user("董先生","7899452","计算机","计算机系","单片机，数学"));<br> xiang.addElement(new user("何先生","7899453","计算机","计算机系","单片机，数学"));<br> if(e.getSource()==pn8.btn)<br> {<br> String ss="123";<br> if(ss.compareTo(pn8.t1.getText())==0&&ss.compareTo(pn8.t2.getText())==0)<br> cc.show(this,"two");<br> else<br> {<br> d1=new Dialog(this,"警告",true);<br> Panel p1=new Panel();<br> p1.add(new Label("您无权进本系统!"));<br> d1.add("Center",p1);<br> Panel p2=new Panel();<br> p2.add(btn1);<br> d1.add("South",p2);<br> d1.setSize(200,100);<br> d1.show();<br> }<br> } <br> if(e.getSource()==btn1)<br> {<br> d1.dispose();<br> }<br> <br> if(e.getSource()==pn9.pn4.btn3)<br> {<br> dispose();<br> System.exit(0);<br> }<br> if(e.getSource()==pn9.pn4.btn2)<br> {<br> pn9.pn6.ta.setText("");<br> ss.append("您的姓名是:"+pn9.pn2.t1.getText()+" "+"您的学号是:"+pn9.pn2.t2.getText()+"");<br> ss.append("您的专业是:"+pn9.pn3.t1.getText()+" "+"您所在院(系)是:"+pn9.pn3.t2.getText()+"");<br> ss.append("您的所有信息将被保存!"); <br> pn9.pn6.ta.setText(ss.toString());<br> user s1=new user(pn9.pn2.t1.getText(),pn9.pn2.t2.getText(),pn9.pn3.t1.getText(),pn9.pn3.t2.getText(),ss.toString());<br> int i;<br> for(i=0;i<xiang.size();i++)<br> {<br> user s=(user)xiang.elementAt(i);<br> if(s.sd.compareTo(s1.sd)==0)<br> {<br> s.username=s1.username;<br> s.sd=s1.sd;<br> s.major=s1.major;<br> s.institute=s1.institute;<br> s.course=s1.course;<br> xiang.setElementAt(new user(s.username,s.sd,s.major,s.institute,s.course),i); <br> break;<br> }<br> }<br> if(i==xiang.size())<br> xiang.addElement(new user(pn9.pn2.t1.getText(),pn9.pn2.t2.getText(),pn9.pn3.t1.getText(),pn9.pn3.t2.getText(),ss.toString()));<br> }<br> if(e.getSource()==pn9.pn4.btn1)<br> { <br> pn9.pn6.ta.setText("");<br> if(pn9.pn2.t2.getText()=="")<br> {<br> d1=new Dialog(this,"注意",true);<br> Panel p1=new Panel();<br> p1.add(new Label("按学号进行查询!请输入学号!再按此键!"));<br> d1.add("Center",p1);<br> Panel p2=new Panel();<br> p2.add(btn1);<br> d1.add("South",p2);<br> d1.setSize(250,100);<br> d1.show();<br> }<br> int i;<br> for(i=0;i<xiang.size();i++)<br> {<br> user s=(user)xiang.elementAt(i);<br> if(s.sd.compareTo(pn9.pn2.t2.getText())==0)<br> {<br> pn9.pn2.t1.setText(""+s.username);<br> pn9.pn3.t1.setText(""+s.major);<br> pn9.pn3.t2.setText(""+s.institute);<br> pn9.pn6.ta.setText("您选修的课程有:"+s.course); <br> break;<br> }<br> }<br> if(i==xiang.size())<br> {<br> d1=new Dialog(this,"警告",true);<br> Panel p1=new Panel();<br> p1.add(new Label("用户不存在!请重新输入!"));<br> d1.add("Center",p1);<br> Panel p2=new Panel();<br> p2.add(btn1);<br> d1.add("South",p2);<br> d1.setSize(200,100);<br> d1.show();<br> }<br> <br> }<br><br> }<br> public void itemStateChanged(ItemEvent e)<br> {<br><br> <br> List temp;<br> String sList[];<br> String mgr=new String("");<br> if(e.getItemSelectable()instanceof List)<br> {<br> temp=(List)(e.getItemSelectable());<br> sList=temp.getSelectedItems();<br> for(int i=0;i<sList.length;i++)<br> mgr=mgr+sList[i]+" ";<br> ss.append(mgr);<br> }<br> }<br><br><br>}<br>本程序已经成功！！！望再验证！！！！<br> </td>
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