java ---- MenuFrame事件

import java.awt.BorderLayout;import java.awt.CheckboxMenuItem;import java.awt.Component;import java.awt.Font;import java.awt.Frame;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.MenuShortcut;import java.awt.PopupMenu;import java.awt.TextArea;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.awt.event.KeyEvent;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TextMenu { //定义主类public static void main(String arge[]) {MyMenuFrame mf = new MyMenuFrame();}}class  MyMenuFrame extends Frame { //定义窗口类MenuBar m_MenuBar;  //定义菜单Menu menuFile, menuEdit, sub_Edit_Font; //定义菜单项MenuItem mi_File_Open, mi_File_Close, mi_File_Exit;  //file中的菜单子项MenuItem mi_Edit_Cut, mi_Edit_Copy, mi_Edit_Paste;   //edit中的菜单子项CheckboxMenuItem mi_Font_Style, mi_Font_Size;   //定义选择式的菜单子项PopupMenu popM; //定义弹出式菜单MenuItem pi_Left, pi_Center, pi_Right; //定义弹出式菜单的子项TextArea ta; //定义文本域String ta_Font_Name;int ta_Font_Style, new_Style, ta_Font_Size, new_Size;MyMenuFrame() {//构造函数super("拥有菜单的窗口");//指定窗口标题ta = new TextArea("\n\n\n\t\t\t 目前没有执行菜单命令", 5, 30);ta.addMouseListener(new HandleMouse()); //文本域响应鼠标事件add(ta, BorderLayout.CENTER);//将文本域加到窗体的中央位置m_MenuBar = new MenuBar(); //穿件菜单条menuFile = new Menu("文件");//创建“文件”菜单项mi_File_Open = new MenuItem("打开");//依次创建菜单子项mi_File_Open.setShortcut(new MenuShortcut(KeyEvent.VK_0));//指定快捷键mi_File_Close = new MenuItem("关闭");mi_File_Exit = new MenuItem("退出");mi_File_Open.addActionListener(new HandleAct());//是菜单项响应动作事件mi_File_Close.addActionListener(new HandleAct());mi_File_Exit.addActionListener(new HandleAct());menuFile.add(mi_File_Open);//吧菜单子项加入到菜单项中menuFile.add(mi_File_Close);menuFile.addSeparator();//加一条航向分割线menuFile.add(mi_File_Exit);m_MenuBar.add(menuFile);//吧“文件”菜单项加入菜单条menuEdit = new Menu("编辑");mi_Edit_Cut = new MenuItem("剪切");//创建选择菜单子项mi_Edit_Copy = new MenuItem("复制");mi_Edit_Paste = new MenuItem("粘贴");sub_Edit_Font = new Menu("字体"); //创建菜单项mi_Font_Size = new CheckboxMenuItem("粗体");//隐含为未选中mi_Font_Style = new CheckboxMenuItem("大字体");mi_Edit_Cut.addActionListener(new HandleAct());//注册监听者mi_Edit_Copy.addActionListener(new HandleAct());mi_Edit_Paste.addActionListener(new HandleAct());mi_Font_Size.addItemListener(new HandleItem1());mi_Font_Style.addItemListener(new HandleItem2());sub_Edit_Font.add(mi_Font_Size);//向子菜单加入菜单命令sub_Edit_Font.add(mi_Font_Style);menuEdit.add(mi_Edit_Cut);menuEdit.add(mi_Edit_Copy);menuEdit.add(mi_Edit_Paste);menuEdit.addSeparator(); //加入分割条menuEdit.add(sub_Edit_Font);//加入带有子猜得到菜单项m_MenuBar.add(menuEdit);//吧“编辑”菜单项加入菜单条this.setMenuBar(m_MenuBar);//吧菜单条加入这个frame容器popM = new PopupMenu();//创建太初菜单pi_Left = new MenuItem("左对齐");//为弹出窗体创建菜单子项pi_Left.addActionListener(new HandleAct());//是弹出菜单响应动作事件popM.add(pi_Left);//为弹出初菜单加入菜单子项pi_Center = new MenuItem("居中");pi_Center.addActionListener(new HandleAct());popM.add(pi_Center);pi_Right = new MenuItem("右对齐");pi_Right.addActionListener(new HandleAct());popM.add(pi_Right);ta.add(popM);//将弹出菜单加载文本域上addWindowListener(new HandleClose());//将frame注册给窗口事件监听者setSize(400, 200);//置frame初始化大小setVisible(true);//置frame可见ta_Font_Name = (ta.getFont()).getName();//取文本域字体ta_Font_Style = (ta.getFont()).getStyle();new_Size = ta_Font_Style;ta_Font_Size = (ta.getFont()).getSize();new_Size = ta_Font_Size;}class HandleAct implements ActionListener {//内部类（处理菜单命令）@Overridepublic void actionPerformed(ActionEvent e) {//响应动作事件// TODO Auto-generated method stubif (e.getActionCommand() == "退出") {//"退出"菜单命令dispose();//释放窗体System.exit(0);//退出程序} else//执行其他命令式只显示菜单项名称ta.setText("\n\n\n\t\t\t"+"执行菜单命令" + e.getActionCommand());}}class HandleMouse extends MouseAdapter { //内部类（处理鼠标事件）public void mouseReleased(MouseEvent e) {  //鼠标按键松开事件弹出菜单if (e.isPopupTrigger())//检查鼠标事件是否由弹出菜单引发popM.show((Component) e.getSource(), e.getX(), e.getY());}//将弹出菜单显示在用户鼠标单击的位置}class HandleItem1 implements ItemListener { //内部类（处理粗体）@Overridepublic void itemStateChanged(ItemEvent e) {  //响应选择型菜单项// TODO Auto-generated method stubif (((CheckboxMenuItem) e.getSource()).getState()) {  //查看是否选中//选择处理new_Size = Font.BOLD;ta.setFont(new Font(ta_Font_Name, ta_Font_Style, ta_Font_Size));ta.setText("\n\n\n\t\t\t" + "你选择了粗体");} else {//未选择处理new_Style = ta_Font_Style;ta.setFont(new Font(ta_Font_Name, ta_Font_Style, ta_Font_Size));ta.setText("\n\n\n\t\t\t" + "你没有选择粗体");}}}class HandleItem2 implements ItemListener {//内部类（处理“大字体”）@Overridepublic void itemStateChanged(ItemEvent e) {//响应选择型菜单项// TODO Auto-generated method stubif (((CheckboxMenuItem) e.getSource()).getState()) {//查看是否选中//选中处理new_Size = ta_Font_Size * 2;ta.setFont(new Font(ta_Font_Name, new_Size, new_Style));ta.setText("\n\n\n\t\t\t" + "你选择了大体");} else {//未选中处理new_Size = ta_Font_Size;ta.setFont(new Font(ta_Font_Name, new_Style, new_Size));ta.setText("\n\n\n\t\t\t" + "你没选择大体");}}}class HandleClose extends WindowAdapter {//处理窗口事件public void windowClosing(WindowEvent e) {//响应窗口关闭框dispose();//释放窗体所占资源System.exit(0);//退出程序}}}