组合框、单选框、按钮、右键快捷菜单以及对话框的练习

/** * 用户信息输入 * @author 索广宇 *@date 2011/4/23 */import java.awt.*;import java.awt.event.*;import javax.swing.*;public class UserJFrame extends JFrame implements ActionListener, MouseListener {/** * */private static final long serialVersionUID = 1L;private int number=1;//编号private JTextField text_number,text_name;private JRadioButton radio_male,radio_female;private JComboBox combox_province,combox_city;private JButton btn_add;private JTextArea text_user;private Object cities[][];private JPopupMenu popMenu;//右键快捷菜单public UserJFrame(Object provinces[],Object cities[][]){//设置框架super("输入用户信息");this.setBounds(300,240,360,200);this.setDefaultCloseOperation(EXIT_ON_CLOSE);this.getContentPane().setLayout(new GridLayout(1,2));//设置内容窗格的布局，一行两列text_user=new JTextArea();text_user.setEditable(false);text_user.addMouseListener(this);//让文本区注册鼠标事件监听器this.getContentPane().add(text_user);//把文本区添加到窗格的左半部分popMenu=new JPopupMenu();//定义一个快捷菜单String popMenuItemStr[]={"剪切","复制","粘贴"};//定义快捷菜单中菜单项的字符串JMenuItem popMenuItem[]=new JMenuItem[popMenuItemStr.length];//定义快捷菜单中的菜单项for(int i=0;i<popMenuItemStr.length;i++){popMenuItem[i]=new JMenuItem(popMenuItemStr[i]);popMenu.add(popMenuItem[i]);popMenuItem[i].addActionListener(this);}popMenuItem[0].setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL_MASK));//设置一个快捷键text_user.add(popMenu);JPanel panel=new JPanel(new GridLayout(6,1));//增加一个6行1列的面板this.getContentPane().add(panel);//把面板添加到窗格的右半部分//添加窗格右半部分的组件text_number=new JTextField("1");text_number.setEditable(false);panel.add(text_number);text_name=new JTextField("呆呆");panel.add(text_name);JPanel panel_rb=new JPanel(new GridLayout(1,2));//新建一个面板，用来存放单选按钮panel.add(panel_rb);ButtonGroup btnGrp=new ButtonGroup();//创建一个按钮组，配合单选按钮使用radio_male=new JRadioButton("男");//默认选中btnGrp.add(radio_male);panel_rb.add(radio_male);//先将单选按钮添加到按钮组中，再添加到按钮面板中radio_female=new JRadioButton("女",true);btnGrp.add(radio_female);panel_rb.add(radio_female);this.cities=cities;combox_province=new JComboBox(provinces);combox_province.setEditable(true);combox_province.addActionListener(this);panel.add(combox_province);combox_city=new JComboBox(cities[0]);panel.add(combox_city);btn_add=new JButton("添加");btn_add.addActionListener(this);panel.add(btn_add);this.setVisible(true);}@Overridepublic void actionPerformed(ActionEvent e) {if(e.getSource()==combox_province){int i=combox_province.getSelectedIndex();//取得所选中项的序列号combox_city.removeAllItems();//移除city复合框中的选项for(int j=0;j<this.cities[i].length;j++){combox_city.addItem(this.cities[i][j]);}}if(e.getSource()==btn_add){if(text_name.getText().isEmpty())JOptionPane.showMessageDialog(this,"请输入姓名");else{String aLine=number+" "+text_name.getText()+" ";if(radio_male.isSelected())aLine+=radio_male.getText()+" ";if(radio_female.isSelected())aLine+=radio_female.getText()+" ";aLine+=combox_province.getSelectedItem()+" ";//获得组合框选中项的字符串aLine+=combox_city.getSelectedItem();//在窗格的左半部分的文本区中，显示输入的信息text_user.append(aLine+"/n");this.number++;text_number.setText(""+this.number);text_name.setText("");}}if(e.getSource() instanceof JMenuItem){if(e.getActionCommand()=="剪切")text_user.cut();//送至系统剪贴板if(e.getActionCommand()=="复制")text_user.copy();if(e.getActionCommand()=="粘贴")text_user.paste();}}public static void main(String args[]){Object provinces[]={"吉林省","湖南省","河北省"};Object cities[][]={{"长春","吉林"},{"长沙","岳阳"},{"石家庄","邯郸"}};new UserJFrame(provinces,cities);}@Overridepublic void mouseClicked(MouseEvent e) {// TODO Auto-generated method stubif(e.getModifiers()==MouseEvent.BUTTON3_MASK)//如果单击的是鼠标的右键popMenu.show(text_user,e.getX(),e.getY());//在鼠标右击的地方弹出快捷菜单}@Overridepublic void mousePressed(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mouseReleased(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mouseEntered(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mouseExited(MouseEvent e) {// TODO Auto-generated method stub}} 

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