实验项目3 组件与事件处理第2部分

实验项目3 第2部分组件与事件处理（2）[实验目的]1、进一步掌握java组件及事件编程的各种方法。

2、掌握对话框的编制和事件处理方法。

3、掌握鼠标焦点事件、鼠标事件及键盘事件的处理方法。

4、掌握Swing组件及事件编程方法。

[实验要求]1、复习理论教学中所学的内容。

2、认真进行实验预习，查阅参考书，书写源程序，书写实验预习报告。

3、认真总结实验并书写实验报告。

[实验课时] 2学时[实验教学方式] 学生上机实验，教师随堂指导。

[实验内容]1、字体对话框：请读懂下面模板代码，将其补充完整并调试运行。

//FontFamilyNames.javaimport java.awt.GraphicsEnvironment;public class FontFamilyNames{ String fontName[];public String [] getFontName(){ GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();fontName=ge.getAvailableFontFamilyNames();return fontName;}}//FontDialog.javaimport java.awt.event.*;import java.awt.*;import javax.swing.JLabel;public class FontDialog extends Dialog implements ItemListener,ActionListener { FontFamilyNames fontFamilyNames;int fontSize=38;String fontName;Choice fontNameList;JLabel label;Font font;Button yes,cancel;static int YES=1,NO=0;int state=-1;FontDialog(Frame f){ super(f);fontFamilyNames=new FontFamilyNames();【代码1】 //对话框设置为有模式yes=new Button("Yes");cancel=new Button("cancel");yes.addActionListener(this);cancel.addActionListener(this);label=new JLabel("hello,奥运",JLabel.CENTER); fontNameList=new Choice();String name[]=fontFamilyNames.getFontName();for(int k=0;k<name.length;k++){ fontNameList.add(name[k]);}fontNameList.addItemListener(this);add(fontNameList,BorderLayout.NORTH);add(label,BorderLayout.CENTER);Panel pSouth=new Panel();pSouth.add(yes);pSouth.add(cancel);add(pSouth,BorderLayout.SOUTH);setBounds(100,100,280,170);addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) { state=NO;setVisible(false);}});validate();}public void itemStateChanged(ItemEvent e){ fontName=(String)fontNameList.getSelectedItem();font=new Font(fontName,Font.BOLD,fontSize);label.setFont(font);label.repaint();validate();}public void actionPerformed(ActionEvent e){ if(e.getSource()==yes){ state=YES;【代码2】 //对话框设置为不可见}else if(e.getSource()==cancel){ state=NO;【代码3】 //对话框设置为不可见}}public int getState(){ return state;}public Font getFont(){ return font;}}// FrameHaveDialog.javaimport java.awt.event.*;import java.awt.*;import javax.swing.JTextArea;public class FrameHaveDialog extends Frame implements ActionListener{ JTextArea text;Button buttonFont;FrameHaveDialog(){ buttonFont=new Button("设置字体");text=new JTextArea("Java 2实用教程（第三版）");buttonFont.addActionListener(this);add(buttonFont,BorderLayout.NORTH);add(text);setBounds(60,60,300,300);setVisible(true);validate();addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e){ System.exit(0);}});}public void actionPerformed(ActionEvent e){ if(e.getSource()==buttonFont){ FontDialog dialog=【代码4】 //创建对话框【代码5】 //对话框设置为可见【代码6】 //对话框设置设置标题为“字体对话框”if(dialog.getState()==FontDialog.YES){ text.setFont(dialog.getFont());text.repaint();}if(dialog.getState()==FontDialog.NO){ text.repaint();}}}}//FontDialogMainClass.javapublic class FontDialogMainClass{ public static void main(String args[]){ new FrameHaveDialog();}}2、英语单词拼写练习：请读懂下面模板代码，将其补充完整并调试运行。

//RondomString.javapublic class RondomString{ String str="";public String getRondomString(String s){ StringBuffer strBuffer=new StringBuffer(s);int m=strBuffer.length();for(int k=0;k<m;k++){ int index=(int)(Math.random()*strBuffer.length());char c=strBuffer.charAt(index);str=str+c;strBuffer=strBuffer.deleteCharAt(index);}return str;}}//LetterLabel.javaimport java.awt.*;import java.awt.event.*;public class LetterLabel extends Button implements FocusListener,MouseListener { LetterLabel(){ 【代码1】 //将当前对象注册为自身的焦点视器【代码2】 //将当前对象注册为自身的标监视器setBackground(Color.cyan);setFont(new Font("",Font.BOLD,30));}public static LetterLabel[] getLetterLabel(int n){ LetterLabel a[]=new LetterLabel[n];for(int k=0;k<a.length;k++){ a[k]=new LetterLabel();}return a;}public void focusGained(FocusEvent e){ setBackground(Color.red);}public void focusLost(FocusEvent e){ setBackground(Color.cyan);}public void mousePressed(MouseEvent e){ requestFocus();}public void setText(char c){ setLabel(""+c);}public void mouseReleased(MouseEvent e){}public void mouseEntered(MouseEvent e) {}public void mouseExited(MouseEvent e) {}public void mouseClicked(MouseEvent e){}}//SpellingWordFrame.javaimport java.awt.*;import java.awt.event.*;import javax.swing.Box;public class SpellingWordFrame extends Frame implements KeyListener,ActionListener { TextField inputWord;Button button;LetterLabel label[];Panel northP,centerP;Box wordBox;String hintMessage="用鼠标单击字母，按左右箭头交换字母，将其排列成所输入的单词";Label messaageLabel=new Label(hintMessage);String word="";SpellingWordFrame(){ inputWord=new TextField(12);button=new Button("确定");button.addActionListener(this);inputWord.addActionListener(this);northP=new Panel();northP.add(new Label("输入一个英文单词："));northP.add(inputWord);northP.add(button);centerP=new Panel();wordBox=Box.createHorizontalBox();centerP.add(wordBox);add(northP,BorderLayout.NORTH);add(centerP,BorderLayout.CENTER);add(messaageLabel,BorderLayout.SOUTH);setBounds(100,100,350,180);setVisible(true);validate();addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) { System.exit(0);}});}public void actionPerformed(ActionEvent e){ word=inputWord.getText();int n=word.length();RondomString rondom=new RondomString();String randomWord=rondom.getRondomString(word);wordBox.removeAll();messaageLabel.setText(hintMessage);if(n>0){ label=LetterLabel.getLetterLabel(n);for(int k=0;k<label.length;k++){ 【代码3】 //将当前窗口注册为label[k]的键盘监视器label[k].setText(""+randomWord.charAt(k));wordBox.add(label[k]);}validate();inputWord.setText(null);label[0].requestFocus();}}public void keyPressed(KeyEvent e){ LetterLabel sourceLabel=(LetterLabel)e.getSource();int index=-1;if(【代码4】) //判断按下的是否是←键){ for(int k=0;k<label.length;k++){ if(label[k]==sourceLabel){ index=k;break;}}if(index!=0){ String temp=label[index].getText();label[index].setText(label[index-1].getText());label[index-1].setText(temp);label[index-1].requestFocus();}}else if(【代码5】) //判断按下的是否是→键{ for(int k=0;k<label.length;k++){ if(label[k]==sourceLabel){ index=k;break;}}if(index!=label.length-1){ String temp=label[index].getText();label[index].setText(label[index+1].getText());label[index+1].setText(temp);label[index+1].requestFocus();}}validate();}public void keyTyped(KeyEvent e){}public void keyReleased(KeyEvent e){ String success="";for(int k=0;k<label.length;k++){ String str=label[k].getText();success=success+str;}if(success.equals(word)){ messaageLabel.setText("恭喜你，你成功了");for(int k=0;k<label.length;k++){ label[k].removeKeyListener(this);label[k].removeFocusListener(label[k]);label[k].setBackground(Color.green);}inputWord.requestFocus();}}}//WordMainClass.javapublic class WordMainClass{ public static void main(String args[]){ new SpellingWordFrame();}}3、JLayeredPane分层窗格模板代码import javax.swing.*;import java.awt.*;class LayerExample{ public static void main(String args[]){ JFrame win=new JFrame("窗体");win.setBounds(100,100,300,300);win.setVisible(true);JButton b1=new JButton("我在DEFAULT_LAYER"),b2=new JButton("我在PALETTE_LAYER"),b3 =new JButton("我在MODAL_LAYER"),b4 =new JButton("我在POPUP_LAYER"),b5=new JButton("我在DRAG_LAYER");Container contenetPane=win.getContentPane();JLayeredPane pane= new JLayeredPane();pane.setLayout(null);【代码1】 //pane将组件b5放置在DRAG_LAYER层【代码2】 //pane将组件b4放置在POPUP_LAYER层【代码3】 //pane将组件b3放置在MODAL_LAYER层【代码4】 //pane将组件b2放置在PALETTE_LAYER层【代码5】 //pane将组件b3放置在DEFAULT_LAYER层 b5.setBounds(50,50,200,100);b4.setBounds(40,40,200,100);b3.setBounds(30,30,200,100);b2.setBounds(20,20,200,100);b1.setBounds(10,10,200,100);b1.setBackground(Color.red);b2.setBackground(Color.pink);b3.setBackground(Color.green);b4.setBackground(Color.orange);b5.setBackground(Color.yellow);contenetPane.add(pane,BorderLayout.CENTER);contenetPane.validate();win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}}4、使用表格显示日历//CalendarBean.javaimport java.util.Calendar;public class CalendarBean{ int year=2005,month=0,nextDay;public void setYear(int year){ this.year=year;}public int getYear(){ return year;}public void setMonth(int month){ this.month=month;}public int getMonth(){ return month;}public String[][] getCalendar(){ String a[][]=new String[6][7];Calendar 日历=Calendar.getInstance();日历.set(year,month-1,1);int 星期几=日历.get(Calendar.DAY_OF_WEEK)-1;int day=0;if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) { day=31;}if(month==4||month==6||month==9||month==11){ day=30;}if(month==2){ if(((year%4==0)&&(year%100!=0))||(year%400==0)){ day=29;}else{ day=28;}}nextDay=1;for(int k=0;k<6;k++){ if(k==0)for(int j=星期几;j<7;j++){ a[k][j]=" "+nextDay ;nextDay++;}elsefor(int j=0;j<7&&nextDay<=day;j++){ a[k][j]=""+nextDay ;nextDay++;}}return a;}}//CalenderFrame.javaimport javax.swing.*;import java.awt.*;import java.awt.event.*;public class CalenderFrame extends JFrame implements ActionListener{ JTable table;Object name[]={"星期日","星期一","星期二","星期三", "星期四","星期五","星期六"};JButton nextMonth,previousMonth;int year=2006,month=5;CalendarBean calendar;String rili[][];JLabel showMessage=new JLabel("",JLabel.CENTER);JScrollPane scroll;public CalenderFrame(){ calendar=new CalendarBean();calendar.setYear(year);calendar.setMonth(month);rili=calendar.getCalendar();【代码1】 //使用数组rili和name创建tabletable.setRowSelectionAllowed(false);nextMonth=new JButton("下月");previousMonth=new JButton("上月");nextMonth.addActionListener(this);previousMonth.addActionListener(this);JPanel pNorth=new JPanel(),pSouth=new JPanel();pNorth.add(previousMonth);pNorth.add(nextMonth);pSouth.add(showMessage);showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+"月" );scroll=new JScrollPane(table);add(scroll,BorderLayout.CENTER);add(pNorth,BorderLayout.NORTH);add(pSouth,BorderLayout.SOUTH);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setBounds(100,100,400,240);setVisible(true);validate();}public void actionPerformed(ActionEvent e){ if(e.getSource()==nextMonth){ month=month+1;if(month>12)month=1;calendar.setMonth(month);rili=calendar.getCalendar();remove(scroll);【代码2】 //使用数组rili和name创建tabletable.setRowSelectionAllowed(false);scroll=new JScrollPane(table);add(scroll,BorderLayout.CENTER);}else if(e.getSource()==previousMonth){ month=month-1;if(month<1)month=12;calendar.setMonth(month);rili=calendar.getCalendar();remove(scroll);【代码3】 //使用数组rili和name创建tabletable.setRowSelectionAllowed(false);scroll=new JScrollPane(table);add(scroll,BorderLayout.CENTER);}showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+"月" );}}//CalendarMainClass.javapublic class CalendarMainClass{ public static void main(String args[]){ new CalenderFrame();}}5、多文档界面（MDI）模板代码//MDIExample.javaimport javax.swing.*;import javax.swing.event.*;import java.awt.*;import java.awt.event.*;class MyInternalFrame extends JInternalFrame{ JTextArea text;MyInternalFrame(String title){ super(title,true,true,true,true);text=new JTextArea();Container con=getContentPane();con.add(new JScrollPane(text),BorderLayout.CENTER);setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);addInternalFrameListener(new InternalFrameAdapter (){ public void internalFrameActivated(InternalFrameEvent e) { setLayer(JDesktopPane.DRAG_LAYER);}public void internalFrameDeactivated(InternalFrameEvent e) { setLayer(JDesktopPane.DEFAULT_LAYER);}});}public JTextArea getJTextArea(){ return text;}}class Mywindow extends JFrame implements ActionListener{ JDesktopPane desk;JMenuBar menubar;JMenu menu;JMenuItem itemNew,itemCopy,itemCut,itemPaste;Container con;Mywindow(){ setSize(360,360);setVisible(true);con=getContentPane();desk=【代码1】 //创建JdesktopPane对象。