对话框AWT组件实践

1、 南昌大学实验报告学生姓名： 杨晖 学 号： 8000114244 专业班级： 卓越141班 实验类型： 验证 综合 设计 创新 实验日期： 2016.11.25 实验成绩： 一、 实验项目名称上机实践10 对话框 && AWT组件实践二、 实验目的和要求实验目的：熟悉java GUI编程三、 实验步骤修改以及增加的代码已经用底色注明，请老师留意实验1 字体对话框FontDialog.javapackage 实验1;import java.awt.event.*;import java.awt.*;import javax.swing.*;public class FontDi

2、alog extends JDialog implements ItemListener,ActionListener FontFamilyNames fontFamilyNames; int fontSize=38; String fontName; JComboBox fontNameList,fontSizeList; JLabel label; Font font; JButton yes,cancel; static int YES=1,NO=0; int state=-1; FontDialog(JFrame f) super(f); setTitle("字体对话框&qu

3、ot;); font=new Font("宋体",Font.PLAIN,12); fontFamilyNames=new FontFamilyNames(); setModal(true); /当前对话框调用setModal(boolean b)设置为有模式 yes=new JButton("Yes"); cancel=new JButton("cancel"); yes.addActionListener(this); cancel.addActionListener(this); label=new JLabel("he

4、llo,奥运",JLabel.CENTER); fontNameList=new JComboBox(); fontSizeList=new JComboBox(); String name=fontFamilyNames.getFontName(); fontNameList.addItem("字体"); for(int k=0;k<name.length;k+) fontNameList.addItem(namek); fontSizeList.addItem("大小"); for(int k=8;k<72;k=k+2) fon

5、tSizeList.addItem(new Integer(k); fontNameList.addItemListener(this); fontSizeList.addItemListener(this); JPanel pNorth=new JPanel(); pNorth.add(fontNameList); pNorth.add(fontSizeList); add(pNorth,BorderLayout.NORTH); add(label,BorderLayout.CENTER); JPanel pSouth=new JPanel(); pSouth.add(yes); pSout

6、h.add(cancel); add(pSouth,BorderLayout.SOUTH); setBounds(100,100,280,170); setDefaultCloseOperation(DISPOSE_ON_CLOSE); validate(); public void itemStateChanged(ItemEvent e) if(e.getSource()=fontNameList) fontName=(String)fontNameList.getSelectedItem(); font=new Font(fontName,Font.PLAIN,fontSize); el

7、se if(e.getSource()=fontSizeList) Integer m=(Integer)fontSizeList.getSelectedItem(); fontSize=Value(); font=new Font(fontName,Font.PLAIN,fontSize); label.setFont(font); label.repaint(); validate(); public void actionPerformed(ActionEvent e) if(e.getSource()=yes) state=YES; setVisible(false); /对

8、话框设置为不可见 else if(e.getSource()=cancel) state=NO; setVisible(false); /对话框设置为不可见 public int getState() return state; public Font getFont() return font; 按”yes”按钮之后字体对话框自动隐藏：主窗口字体发生改变7实验后的练习给上述实验中的对话框增加设置字体的字形（常规LPAIN，加重BOLD，斜体ITALIC）功能。可以对Font类的static常量LPAIN，BOLD，ITALIC，进行有效的运算，例如Font.BOLD+Font.ITALIC就

9、是加重的斜体字形。修改FontDialg.javapackage 实验1;import java.awt.event.*;import java.awt.*;import javax.swing.*;public class FontDialog extends JDialog implements ItemListener,ActionListener FontFamilyNames fontFamilyNames; int fontSize=38; String fontName,fontXing;/增加一个字形下拉框的字符串变量fontXing JComboBox fontNameLis

10、t,fontSizeList; JComboBox fontType; /增加字形下拉框 JLabel label; Font font; JButton yes,cancel; static int YES=1,NO=0; int state=-1; FontDialog(JFrame f) super(f); setTitle("字体对话框"); font=new Font("宋体",Font.PLAIN,12); fontFamilyNames=new FontFamilyNames(); setModal(true); /当前对话框调用setMo

11、dal(boolean b)设置为有模式 yes=new JButton("Yes"); cancel=new JButton("cancel"); yes.addActionListener(this); cancel.addActionListener(this); label=new JLabel("hello,奥运",JLabel.CENTER); fontNameList=new JComboBox(); fontSizeList=new JComboBox(); fontType = new JComboBox();/常规

12、PLAIN，加重BOLD，斜体ITALIC /声明语句 fontType.addItem("常规"); fontType.addItem("加重"); fontType.addItem("斜体"); fontType.addItem("常规斜体"); fontType.addItem("加重斜体"); fontType.addItemListener(this); String name=fontFamilyNames.getFontName(); fontNameList.addItem(&q

13、uot;字体"); for(int k=0;k<name.length;k+) fontNameList.addItem(namek); fontSizeList.addItem("大小"); for(int k=8;k<72;k=k+2) fontSizeList.addItem(new Integer(k); fontNameList.addItemListener(this); fontSizeList.addItemListener(this); JPanel pNorth=new JPanel(); pNorth.add(fontNameLi

14、st); pNorth.add(fontSizeList); pNorth.add(fontType); add(pNorth,BorderLayout.NORTH); add(label,BorderLayout.CENTER); JPanel pSouth=new JPanel(); pSouth.add(yes); pSouth.add(cancel); add(pSouth,BorderLayout.SOUTH); setBounds(100,100,400,170); /加宽对话框来正常显示新增的字形下拉框 setDefaultCloseOperation(DISPOSE_ON_CL

15、OSE); validate(); public void itemStateChanged(ItemEvent e) if(e.getSource()=fontNameList) fontName=(String)fontNameList.getSelectedItem(); font=new Font(fontName,Font.PLAIN,fontSize); else if(e.getSource()=fontSizeList) Integer m=(Integer)fontSizeList.getSelectedItem(); fontSize=Value(); font=

16、new Font(fontName,Font.PLAIN,fontSize); else if(e.getSource() = fontType) fontXing = (String)fontType.getSelectedItem(); if(fontXing.equals("常规") font = new Font(fontName, Font.PLAIN, fontSize); else if(fontXing.equals("加重") font = new Font(fontName, Font.BOLD, fontSize); else if

17、(fontXing.equals("斜体") font = new Font(fontName, Font.ITALIC, fontSize); else if(fontXing.equals("常规斜体") font = new Font(fontName, Font.PLAIN+Font.ITALIC, fontSize); else if(fontXing.equals("加重斜体") font = new Font(fontName, Font.BOLD+Font.ITALIC, fontSize); label.setFon

18、t(font); label.repaint(); validate(); public void actionPerformed(ActionEvent e) if(e.getSource()=yes) state=YES; setVisible(false); /对话框设置为不可见 else if(e.getSource()=cancel) state=NO; setVisible(false); /对话框设置为不可见 public int getState() return state; public Font getFont() return font; 效果图见下页：实验2 计算平方

19、根package 实验2;import javax.swing.*;public class InputNumber public static void main(String args) double result=0; boolean inputComplete=false; while(inputComplete=false) String str=JOptionPane.showInputDialog(null, "请输入一个正数","输入框",JOptionPane.PLAIN_MESSAGE); /弹出输入对话框 try result =

20、Double.parseDouble(str); if(result>=0) inputComplete = true; catch(NumberFormatException exp) JOptionPane.showMessageDialog(null, "输入错误","警告",JOptionPane.WARNING_MESSAGE); /弹出消息对话框 inputComplete = false; double sqrtRoot = Math.sqrt(result); System.out.println(result+"平方根:

21、"+sqrtRoot); 7实验后的练习编写一个应用程序，程序运行时弹出一个输入对话框，用户使用该对话框输入一个字符串，但不允许输入的字符串的长度超过10，否则程序弹出一个消息对话框，警告出现了输入错误。如果输入无错误，程序输出用户输入的字符串的长度。package 实验2;import javax.swing.*;public class InputNumber public static void main(String args) long chang; String str; boolean inputComplete=false; while(inputComplete =

22、 false) str=JOptionPane.showInputDialog(null, "请输入字符串","输入框",JOptionPane.PLAIN_MESSAGE); /弹出输入对话框 chang = str.length(); if(chang>10) JOptionPane.showMessageDialog(null, "输入错误","警告",JOptionPane.WARNING_MESSAGE); /弹出消息对话框 inputComplete = false; else System.ou

23、t.println("字符串长为："+str.length(); inputComplete = true; AWT组件实践实验1 算术测试ComputerFrame.java实验1 package 实验3;import java.awt.*;import java.awt.event.*;public class ComputerFrame extends Frame implements ActionListener TextField textOne,textTwo,textResult; Button getProblem,giveAnwser; Label ope

24、ratorLabel,message; Teacher teacher; ComputerFrame(String s) super(s); teacher=new Teacher(); setLayout(new FlowLayout(); textOne=new TextField(10); /创建textOne,其可见字符长是10 textTwo=new TextField(10); /创建textTwo,其可见字符长是10 textResult=new TextField(10); /创建textResult,其可见字符长是10 operatorLabel=new Label(&quo

25、t;+"); message=new Label("你还没有回答呢"); getProblem=new Button("获取题目"); giveAnwser=new Button("确认答案"); add(getProblem); add(textOne); add(operatorLabel); add(textTwo); add(new Label("="); add(textResult); add(giveAnwser); add(message); textResult.requestFocus

26、(); textOne.setEditable(false); textTwo.setEditable(false); getProblem.addActionListener(this);/将当前窗口注册为getProblem的ActionEvent事件监视器 giveAnwser.addActionListener(this);/将当前窗口注册为giveAnwser的ActionEvent事件监视器 textResult.addActionListener(this);/将当前窗口注册为textResult的ActionEvent事件监视器 setBounds(100,100,450,10

27、0); setVisible(true); validate(); addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit(0); ); public void actionPerformed(ActionEvent e) if(e.getSource() = getProblem) /判断事件源是否是getProblem int number1=teacher.giveNumberOne(100); int number2=teacher.giveNumberTwo(

28、100); String operator=teacher.giveOperator(); textOne.setText(""+number1); textTwo.setText(""+number2); operatorLabel.setText(operator); message.setText("请回答");textResult.setText(null); if(e.getSource() = giveAnwser) /判断事件源是否是giveAnwser String answer=textResult.getText(

29、); try int result=Integer.parseInt(answer); if(teacher.getRight(result)=true) message.setText("你回答正确"); else message.setText("你回答错误"); catch(NumberFormatException ex) message.setText("请输入数字字符"); textResult.requestFocus(); validate(); 输入正确的答案测试：测试不输入确认答案：实验2 信号灯SignalFra

30、me.javapackage 实验4;import java.awt.BorderLayout;import java.awt.Choice;import java.awt.Frame;import java.awt.Label;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class SignalFrame extends Frame implement

31、s ItemListener Choice choice;SignalCanvas signal = null;String itemRed = "红灯", itemYellow = "黄灯", itemGreen = "绿灯"public SignalFrame() choice = new Choice(); / 创建choicechoice.add(itemRed); / 创建choice添加itemRedchoice.add(itemYellow); / 创建choice添加itemYellowchoice.add(itemG

32、reen); / 创建choice添加itemGreenchoice.addItemListener(this); / 将当前窗口注册为choice的ItemEvent事件监视器add(choice, BorderLayout.NORTH);try Class cs = Class.forName("实验4.SignalCanvas");signal = (SignalCanvas) cs.newInstance();add(signal, BorderLayout.CENTER); catch (Exception e) add(new Label("您还没有编

33、写SignalCanvas类"), BorderLayout.CENTER);setBounds(100, 100, 360, 300);setVisible(true);validate();addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit(0););public void itemStateChanged(ItemEvent e) String item = choice.getSelectedItem(); / choice返回被选中的条目int

34、w = signal.getBounds().width;int h = signal.getBounds().height;int m = Math.min(w, h);signal.setRadius(m / 6);if (item.equals(itemRed) if (signal != null) signal.setRed(1);signal.setYellow(0);signal.setGreen(0);signal.setPosition(w / 3, 0);signal.repaint(); else if (item.equals(itemYellow) if (signa

35、l != null) signal.setRed(0);signal.setYellow(1);signal.setGreen(0);signal.setPosition(w / 3, h / 3);signal.repaint(); else if (item.equals(itemGreen) if (signal != null) signal.setRed(0);signal.setYellow(0);signal.setGreen(1);signal.setPosition(w / 3, 2 * h / 3);signal.repaint();实验3 布局与日历CalendarFra

36、me.javapackage 实验5;import java.util.*;import java.awt.*;import java.awt.event.*;import java.applet.*;public class CalendarFrame extends Frame implements ActionListener Label labelDay = new Label42;Button titleName = new Button7;String name = "日", "一", "二", "三"

37、, "四", "五", "六" ;Button nextMonth, previousMonth;int year = 2006, month = 10;CalendarBean calendar;Label showMessage = new Label("", Label.CENTER);public CalendarFrame() Panel pCenter = new Panel();pCenter.setLayout(new GridLayout(7, 7); / 将pCenter的布局设置为7行7列的G

38、ridLayout/ 布局。for (int i = 0; i < 7; i+) titleNamei = new Button(namei);pCenter.add(titleNamei);/ pCenter添加组件titleNamei。for (int i = 0; i < 42; i+) labelDayi = new Label("", Label.CENTER);pCenter.add(labelDayi);/ pCenter添加组件labelDayi。calendar = new CalendarBean();calendar.setYear(yea

39、r);calendar.setMonth(month);String day = calendar.getCalendar();for (int i = 0; i < 42; i+) labelDayi.setText(dayi);nextMonth = new Button("下月");previousMonth = new Button("上月");nextMonth.addActionListener(this);previousMonth.addActionListener(this);Panel pNorth = new Panel(),

40、 pSouth = new Panel();pNorth.add(previousMonth);pNorth.add(nextMonth);pSouth.add(showMessage);showMessage.setText("日历：" + calendar.getYear() + "年" + calendar.getMonth() + "月");ScrollPane scrollPane = new ScrollPane();scrollPane.add(pCenter);add(scrollPane, BorderLayout.

41、CENTER);/ 窗口添加scrollPane在中心区域add(pNorth, BorderLayout.NORTH);/ 窗口添加pNorth 在北面区域add(pSouth, BorderLayout.SOUTH);/ 窗口添加pSouth 在南区域。public void actionPerformed(ActionEvent e) if (e.getSource() = nextMonth) month = month + 1;if (month > 12)month = 1;calendar.setMonth(month);String day = calendar.getC

42、alendar();for (int i = 0; i < 42; i+) labelDayi.setText(dayi); else if (e.getSource() = previousMonth) month = month - 1;if (month < 1)month = 12;calendar.setMonth(month);String day = calendar.getCalendar();for (int i = 0; i < 42; i+) labelDayi.setText(dayi);showMessage.setText("日历：&qu

43、ot; + calendar.getYear() + "年" + calendar.getMonth() + "月");实验1 方程求根package 实验6;import java.awt.*;import java.awt.event.*;public class EquationFrame extends Frame implements ActionListener SquareEquation equation;TextField textA, textB, textC;TextArea showRoots;Button controlButt

44、on;public EquationFrame() equation = new SquareEquation();textA = new TextField(8);textB = new TextField(8);textC = new TextField(8);showRoots = new TextArea();controlButton = new Button("确定");Panel pNorth = new Panel();pNorth.add(new Label("二次项系数:");pNorth.add(textA);pNorth.add(

45、new Label("一次项系数:");pNorth.add(textB);pNorth.add(new Label("常数项系数:");pNorth.add(textC);pNorth.add(controlButton);controlButton.addActionListener(this); / 当前窗口作为controlButton的ActionEvent事件的监视器add(pNorth, BorderLayout.NORTH);add(showRoots, BorderLayout.CENTER);setBounds(100, 100, 6

46、30, 160);setVisible(true);validate();addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit(0););public void actionPerformed(ActionEvent e) try double a = Double.parseDouble(textA.getText(); / textA调用方法获取其中的文本double b = Double.parseDouble(textB.getText();/ textB调用

47、方法获取其中的文本double c = Double.parseDouble(textC.getText(); / textC调用方法获取其中的文本equation.setA(a);equation.setB(b);equation.setC(c);textA.setText("" + a);textB.setText("" + b);textC.setText("" + c);showRoots.append("n 根：" + equation.getRootOne();showRoots.append(&quo

48、t; 根：" + equation.getRootTwo(); catch (Exception ex) showRoots.append("n" + ex + "n");实验2 字体对话框FontDialog.javapackage 实验7;import java.awt.event.*;import java.awt.*;import javax.swing.JLabel;public class FontDialog extends Dialog implements ItemListener, ActionListener FontFa

49、milyNames 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();setModal(true); / 对话框设置为有模式yes = new Button("Yes");cancel

50、 = 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(namek);fontNameList.addItemListe