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1、建立网站的注册界面，运行结果如图。程序运行时，将窗口的各项填充完整，若各项都填充正确，单击“注册”按钮，则弹出一个“消息”对话框，提示注册成功。否则给出相应提醒。若单击“清除”，则刚才所填写的内容将被清空。importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassLoginextendsJAppletimplementsActionListener{JLabellb1,lb2,lb3,lb4,lb5,lb6,lb7,lb8;JComboBoxjcb;JCheckBoxcb;JTextAreata;J
2、Buttonbt1,bt2;JPasswordFieldpf1,pf2;JTextFieldtf1,tf2;JRadioButtonrb[]=newJRadioButton[2];JListlist;JPanelpn1,pn2,pn3;JScrollPanesp1,sp2;ButtonGroupbtg;publicLogin(){lb1=newJLabel("用户名：");lb2=newJLabel("密码：");lb3=newJLabel("确认密码：");lb4=newJLabel("血型：");lb5=newJLabel("性别：");lb6=newJLabel("邮箱：")
3、;lb7=newJLabel("个人简历：");lb8=newJLabel("了解本网站的途径：");jcb=newJComboBox();jcb.addItem("A型");jcb.addItem("B型");jcb.addItem("AB型");jcb.addItem("O型");jcb.setSelectedIndex(0);cb=newJCheckBox("我愿意公开个人信息",true);ta=newJTextArea(5,15);bt1=newJButton("注册");bt2=newJButton("清除");bt1.addActionListener(this);b
4、t2.addActionListener(this);pf1=newJPasswordField(15);pf2=newJPasswordField(15);tf1=newJTextField(15);tf2=newJTextField(15);sp1=newJScrollPane();sp1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);sp1.getViewport().add(ta);rb[0]=newJRadioButton("男");rb[1]=newJRadioButton("女");
5、rb[0].setSelected(true);btg=newButtonGroup();btg.add(rb[0]);btg.add(rb[1]);Stringdata[]={"因特网","报纸杂志","朋友同事","其他方式"};list=newJList(data);list.setSelectedIndex(0);sp2=newJScrollPane();sp2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);sp2.getViewport().add(list);pn1=newJPanel
6、();pn1.add(lb5);pn1.add(rb[0]);pn1.add(rb[1]);GridBagLayoutgb=newGridBagLayout();Containercon=getContentPane();con.setLayout(gb);GridBagConstraintsc=newGridBagConstraints();c.fill=GridBagConstraints.HORIZONTAL;c.anchor=GridBagConstraints.EAST;c.weightx=1.0;c.weighty=1.0;c.gridwidth=1;c.gridhei
7、ght=1;gb.setConstraints(lb1,c);con.add(lb1);gb.setConstraints(tf1,c);con.add(tf1);c.gridwidth=1;gb.setConstraints(lb2,c);con.add(lb2);c.gridwidth=GridBagConstraints.REMAINDER;gb.setConstraints(pf1,c);con.add(pf1);c.gridwidth=1;gb.setCon
