java作业java作业.docx

1、java作业java作业java作业（java作业）软件工程 r1141 宋洋 16 java 作业public class qingdrawpad extends jframe private objectinputstream input;private objectoutputstream output;private jbutton choices ; private string names= newopen.save.pencil by,line,rect ,frect ,oval,foval ,circle,fcircle ,roundrect ,frrect ,rubber.c

2、olor.stroke.the word;private string = stylenames宋体, 隶书, 华文彩云, 仿宋 _ gb2312, 华文行楷 ,方正舒体, times new roman, serif, monospaced ,sonsserif, garamond.;private icon items ;jtoolbar buttonpanel;private jlabel statusbar;private drawpanel drawingarea;private int width = 850, height = 550;drawings itemlist = ne

3、w drawings 5;private int currentchoice = 3;int index = 0;private color color = color.black;int r, g, b;int f1, f2;the string style1;private float stroke = 1.0f;jcheckbox bold, italic;jcombobox styles;public qingdrawpad ()super (卿乐绘图画板 (中国风);jmenubar bar = new jmenubar ();jmenu filemenu = new jmenu (

4、文件);/ / filemenu.setmnemonic (f);jmenuitem newitem = new jmenuitem (新建);newitem.addactionlistener (new actionlistener () public void actionperformed (actionevent (e)newfile (););filemenu.add (newitem);jmenuitem saveitem = new jmenuitem (保存);saveitem.addactionlistener (new actionlistener () public vo

5、id actionperformed (actionevent (e)savefile (); /);filemenu.add (saveitem);jmenuitem loaditem = new jmenuitem (打开);loaditem.addactionlistener (new actionlistener () public void actionperformed (actionevent (e)loadfile (););filemenu.add (loaditem);filemenu.addseparator ();jmenuitem exititem = new jme

6、nuitem (退出);exititem.addactionlistener (new actionlistener () public void actionperformed (actionevent (e)system.exit (0););filemenu.add (exititem);bar.add (filemenu);jmenu colormenu = new jmenu (颜色);jmenuitem coloritem = new jmenuitem (选择颜色);coloritem.addactionlistener (new actionlistener () public

7、 void actionperformed (actionevent (e)choosecolor (););colormenu.add (coloritem);bar.add (colormenu);jmenu strokemenu = new jmenu (线条粗细);jmenuitem strokeitem = new jmenuitem (设置线条粗细);strokeitem.addactionlistener (new actionlistener () public void actionperformed (actionevent (e)setstroke (););stroke

8、menu.add (strokeitem);bar.add (strokemenu);jmenu helpmenu = new jmenu (帮助);jmenuitem aboutitem = new jmenuitem (关于画板);aboutitem.addactionlistener (new actionlistener () public void actionperformed (actionevent (e)joptionpane.showmessagedialog (null,画图板说明joptionpane.information _ message););helpmenu.

9、add (aboutitem);bar.add (helpmenu);items = new imageicon names.length;drawingarea = new drawpanel ();choices = new jbutton names.length;buttonpanel = new jtoolbar (jtoolbar.vertical);buttonpanel = new jtoolbar (jtoolbar.horizontal);buttonhandler is = new buttonhandler ();buttonhandler1 handler1 = ne

10、w buttonhandler1 ();for (int i = 0; i choices.length; i + +)items in = new imageicon (names in + .gif);choices in = new jbutton (, items in);choices in.settooltiptext (tiptext in);buttonpanel.add (choices in);for (int i = 3; in choices.length-3; i + +)choices in.addactionlistener (is);choices 0.adda

11、ctionlistener (new actionlistener () public void actionperformed (actionevent (e)newfile()；）；选择 1 。addactionlistener（新的actionlistener() public void actionPerformed（ActionEvent e）loadfile()；）；选择 2 。addactionlistener（新的actionlistener() public void actionPerformed（ActionEvent e）savefile()；）；选择选择，长度为3 a

12、ddactionlistener（handler1）；选择选择，长度为2 addactionlistener（handler1）；选择选择。length-1 addactionlistener（handler1）；风格=新的JComboBox（stylenames）；（8）setmaximumrowcount风格；additemlistener（风格。新的itemlistener() 公共无效itemstatechanged（itemevent E）style1 = stylenames getselectedindex() 风格；）；大胆=新的复选框（“粗体”）；斜体=新的复选框（“斜体”）

13、；checkboxhandler钱德勒=新checkboxhandler()；大胆additemlistener（Chandler）；斜体。additemlistener（钱德勒）；JPanel wordpanel =新jpanel()；buttonpanel添加（粗体）；buttonpanel添加（斜体）；buttonpanel添加（风格）；风格。setminimumsize（新的维度（50, 20）；风格。setmaximumsize（新的维度（100, 20）；容器C = getcontentpane()；超级setjmenubar（杆）；（buttonpanel，总和4. Border

14、Layout。北）；（drawingarea，总和4. BorderLayout。中心）；状态=新jlabel()；总和4.（StatusBar BorderLayout。南）；状态栏设置（“欢迎使用卿乐绘图画板O（_）O”）；createnewitem()；setsize（宽度，高度）；show()；公共课buttonhandler实现ActionListenerpublic void actionPerformed（ActionEvent e）为（j = 3；J 选择。长度为3；j+）如果（如getsource() = =选择 J ） currentchoice = J；createnew

15、item()；repaint()；公共课buttonhandler1实现ActionListenerpublic void actionPerformed（ActionEvent e）如果（如getsource() = =选择选择，长度为3） choosecolor()；如果（如getsource() = =选择选择，长度为2） setstroke()；如果（如getsource() = =选择选择。length-1） JOptionPane。ShowMessageDialog (null),Please click the drawing board to select the locati

16、on of the input text,Hint, JOptionPane.INFORMATION_MESSAGE);CurrentChoice=14;CreateNewItem ();Repaint ();If (e.getSource () =bold)If (e.getStateChange () =ItemEvent.SELECTED)F1=Font.BOLD;ElseF1=Font.PLAIN;If (e.getSource () =italic)If (e.getStateChange () =ItemEvent.SELECTED)F2=Font.ITALIC;ElseF2=Fo

17、nt.PLAIN;Class DrawPanel extends JPanelPublic DrawPanel ()SetCursor (Cursor.getPredefinedCursor (Cursor.CROSSHAIR_CURSOR);SetBackground (Color.white);AddMouseListener (New mouseA ();AddMouseMotionListener (New mouseB ();Public void paintComponent (Graphics g)Super.paintComponent (g);Graphics2D g2d=

18、(Graphics2D) g;Int j=0;While (j 0）”）；行程=浮parseFloat（输入）；索引自行设计行程=行程；公共无效savefile()档案选择程式=新jfilechooser() JFileChooser；然后在fileChooser. setfileselectionmode（文件对话框。files_only）；int结果=然后在fileChooser. showsavedialog（本）；如果（结果= =文件对话框。cancel_option）返回；文件的文件名，然后在fileChooser. getselectedfile()；canwrite()文件名；如

19、果（文件名= = null | |文件名。getname()。等于（“”）JOptionPane。showmessagedialog（档案选择程式，“文件名无效”，“文件名无效”，JOptionPane error_message）；别的尝试delete()文件名；FileOutputStream FOS =新的输出（文件名）；输出为新的对象（FOS）；图纸的记录；输出writeint（指数）；对于（int = i 0；i 索引；i + +）图P = itemlist 我；输出的writeObject（P）；输出。flush()；（）输出；FOS。（）；赶上（IOException IOE）p

20、rintstacktrace() IOE；公共无效loadfile()档案选择程式=新jfilechooser() JFileChooser；然后在fileChooser. setfileselectionmode（文件对话框。files_only）；int结果=然后在fileChooser. showMessageDialog（本）；如果（结果= =文件对话框。cancel_option）返回；文件的文件名，然后在fileChooser. getselectedfile()；canread()文件名；如果（文件名= = null | |文件名。getname()。等于（“”）JOptionP

21、ane。showmessagedialog（档案选择程式，“文件名无效”，“文件名无效”，JOptionPane error_message）；别的尝试FileInputStream FIS =新的输入（文件名）；输入=新对象输入流（FIS）；图inputrecord；国际countnumber = 0；countnumber =输入。readint()；为（指数= 0；指数小于countnumber；指数+ +）inputrecord =（图）readobject()输入；索引 = inputrecord自行设计；createnewitem()；（）输入；repaint()；赶上（个endo

22、ffileexception）JOptionPane。ShowMessageDialog (this, theres no more records in the file,JOptionPane.ERROR_MESSAGE;Catch (ClassNotFoundException classNotFoundException) JOptionPane.showMessageDialog (this, cannot create objects),JOptionPane.ERROR_MESSAGE;Catch (IOException ioException) JOptionPane.sho

23、wMessageDialog (this) error reading data from file,JOptionPane.ERROR_MESSAGE;Public void newFile ()Index=0;CurrentChoice=3;Color=Color.black;Stroke=1.0f;CreateNewItem ();Repaint ();Public static void main (String args)tryUIManager.setLookAndFeel (UIManager.getSystemLookAndFeelClassName ();Catch (Exception E) QingDrawPad newPad=new QingDrawPad ();NewPad.addWindowListenerNew WindowAdapter () Public void windowClosing (WindowEvent E)System.exit (0););