JAVA實驗報告-簡單繪圖程序

1、實驗三繪制圖形一、實驗目的學會JButton的使用，能進行JButton的基本操作,能使用JButton構造一個圖形界面框架通過實驗熟悉swing圖形用戶界面程序設計熟悉java中的事件處理模型，每個事件動作代表的意義進一步提高編程能力，學會獨立思考，學會上網查找資料決問題。二、實驗內容設計一個程序，該程序能夠繪制基本的圖形（包括圓形、矩形、直線等）；要求有一個簡單易操作的用戶界面（包括菜單、按鈕等組件）。編寫的程序要求能夠實現(xiàn)保存和讀取的功能。三、實驗代碼Main.javaimportjava.awt.BorderLayout;importjava.awt.event.ActionListe

2、ner;importjavax.swing.JButton;importjavax.swing.JFrame;importjavax.swing.JPanel;importjavax.swing.JToolBar;importimportwinpaint.WinToolBar;.windowsPaintpublicclassMain/*paramargs*/publicstaticvoidmain(Stringargs)/TODOAuto-generatedmethodstubJPanelpaintWin=newwindowsPaint(畫圖”)；paintWin.setBounds(0,30

3、,1000,1000);paintWin.setLayout(null);paintWin.setvisible(true);JToolBartool=newWinToolBar(windowsPaint)paintWin);tool.setBounds(0,0,1000,30);tool.setVisible(true);JFrameframe=newJFrame();frame.setLayout(null);frame.setVisible(true);frame.setBounds(0,0,1000,1000);frame.add(tool);frame.add(paintwin);f

4、rame.add(paintwin);test,javaimportjava.awt.GradientPaint;importjava.lang.reflect.Constructor;importbase.GrapicsElem;importbase.Rect;publicclasstestfractor/*paramargsthrowsClassNotFoundException*/publicstaticvoidmain(Stringargs)throwsClassNotFoundException/TODOAuto-generatedmethodstubGrapicsElemGe=ne

5、wRect();System.out.println(Ge.getClass().getName();Classdemo1=null;Classdemo2=null;Classdemo3=null;try/一般盡量采用這種形式demo1=Class.forName(base.Rect);Classcon=demo1.getSuperclass();System.out.println(con.getName();demo2=Class.forName(base.GrapicsElem);Classsuns=demo2.getInterfaces();for(inti=0;isuns.lengt

6、h;i+)System.out.println(sunsi.getName();System.out.println(con.length);/GrapicsElemgg=(GrapicsElem)con0.newInstance();System.out.println(con_0);System.out.println(con1);System.out.println(con2);catch(Exceptione)e.printStackTrace();demo2=newRect().getClass();demo3=Rect.class;+demo1.getName();+demo2.g

7、etName();+demo3.getName();System.out.println(類名稱System.out.println(類名稱System.out.println(類名稱GrapicsElem.javapackagebase;importjava.awt.Color;importjava.awt.Graphics;importjava.awt.Point;publicabstractclassGrapicsElemPointstart;Pointend;privateColorcolor;publicColorgetColor()returncolor;publicvoidset

8、Color(Colorcolor)this.color=color;publicvoidsetStart(Pointstart)this.start=start;publicvoidsetEnd(Pointend)abstractvoidabstractvoidabstractvoidabstractvoidjava.util.ArrayList;classLineextendsGrapicsElemthis.end=end;publicpublicpublicpublicLine.javapackagebase;importjava.awt.Graphics;importjava.awt.P

9、oint;importpublicdoMousePress(Pointp);doMouseDrag(Pointp);doMouseRelease(Pointp);draw(Graphicsg);ArrayListtrack;publicLine()track=newArrayList();Overridepublicvoiddraw(Graphicsg)for(inti=0;itrack.size()-1;i+)Pointcur=track.get(i);Pointnext=track.get(i+1);g.drawLine(cur.x,cur.y,next.x,next.y);private

10、voidAddPoint(Pointp)track.add(p);OverridepublicvoiddoMousePress(Pointp)/TODOAuto-generatedmethodstubAddPoint(p);OverridepublicvoiddoMouseDrag(Pointp)/TODOAuto-generatedmethodstubAddPoint(p);OverridepublicvoiddoMouseRelease(Pointp)/TODOAuto-generatedmethodstubAddPoint(p);Rect.javapackagebase;importja

11、va.awt.Graphics;importjava.awt.Point;publicclassRectextendsGrapicsElemintx,y,width,height;Overridepublicvoiddraw(Graphicsg)/TODOAuto-generatedmethodstubg.drawRect(getX(),getY(),getWidth(),getHeight();OverridepublicvoiddoMousePress(Pointp)super.setStart(p);super.setEnd(p);OverridepublicvoiddoMouseDra

12、g(Pointp)super.setEnd(p);OverridepublicvoiddoMouseRelease(Pointp)super.setEnd(p);publicintgetX()returnMath.min(start.x,end.x);publicintgetY()returnMath.min(start.y,end.y);publicintgetWidth()returnMath.abs(start.x-end.x);publicintgetHeight()returnMath.abs(start.y-end.y);Circle.javapackagebase;importj

13、ava.awt.Graphics;publicclassCircleextendsRectOverridepublicvoiddraw(Graphicsg)/TODOAuto-generatedmethodstubg.drawOval(getX(),getY(),getWidth(),getHeight();windowsPaint.javapackagewinpaint;importjavaawt.BasicStroke;importjavaawt.Button;importjavaawt.Color;importjavaawt.Font;importjavaawt.Graphics;imp

14、ortjavaawtGraphics2D;importjavaawt.Image;importjavaawt.Point;importjavaawt.eventActionEvent;importjavaawt.eventActionListener;importjavaawt.event.MouseEvent;importjavaawt.event.MouseListener;importjavaawt.event.MouseMotionListener;importjavaioFile;importjavaioIOException;importjavanioBuffer;importja

15、vautil.ArrayList;importjavautil.BitSet;importjavautil.List;importjavaawtgeom*;importjavaawtimageBufferedImage;importjavaximageioImagelO;importjavax.swingImageIcon;importjavax.swing.JButton;importjavax.swing.JFrame;importjavax.swing.JLabel;importjavax.swing.JPanel;importjavax.swing.JToolBar;importbas

16、e.Circle;importbase.GrapicsElem;importbase.Line;importbaseRect;importjavaawt.BorderLayout;publicclasswindowsPaintextendsJPanelimplementsMouseListener,MouseMotionListenerStringcommand=矩形；ListLg=newArrayList();GrapicsElemcur;JLabellabel;publicwindowsPaint(Stringtitle)init();privatevoidinit()addMouseLi

17、stener(this);addMouseMotionListener(this);/*可以使用反射去掉判斷語句、Classg=ClassforName(baseRect);gnewInstance();return*/privateGrapicsElemnewInstance()command=WinToolBar.Command;if(commandequals(矩形)returnnewRect();elseif(commandequals(圓形)returnnewCircle();elseif(commandequals(線)returnnewLine();returnnull;/Ove

18、rridepublicvoidpaint(Graphicsg)/TODOAuto-generatedmethodstubsuperpaint(g);Graphics2Dg2d=(Graphics2D)g;g2dsetColor(curgetColor();/System.outprintln(curgetColor();g2dsetStroke(newBasicStroke(100f);for(inti=0;iLgsize();i+)GrapicsElemge=Lgget(i);gedraw(g);/Override/publicvoidrepaint()/TODOAuto-generated

19、methodstub/TODOAuto-generatedmethodstub/superrepaint();Threadthread=newThread(newRunnable()Overridepublicvoidrun()/TODOAuto-generatedmethodstubtrySaveToFile();catch(IOExceptione)/TODOAuto-generatedcatchblockeprintStackTrace(););threadstart();Imageiconbg=newImageIcon(tmpjpg);if(bg!=null)if(label!=nul

20、l)this.remove(label);label=newJLabel(bg);labelsetBounds(0,0,bggetIconWidth(),bggetIconHeight();/thisadd(label);/superrepaint();/privatevoidSaveToFile()throwsException/TODOAuto-generatedmethodstubBufferedlmagebimg=newBufferedImage(thisgetWidth(),thisgetHeight(),BufferedlmageTYPE_3BYTE_BGR);Graphics2D

21、g2d=bimgcreateGraphics();thispaint(g2d);ImageIO.write(bimg,jpg,newFile(tmpjpg);OverridepublicvoidmousePressed(MouseEvente)Pointp=newPoint(egetX(),egetY();cur=newInstance();cur.doMousePress(p);Lgadd(cur);OverridepublicvoidmouseDragged(MouseEvente)Pointp=newPoint(egetX(),egetY();cur.doMouseDrag(p);rep

22、aint();OverridepublicvoidmouseReleased(MouseEvente)Pointp=newPoint(egetX(),egetY();cur.doMouseRelease(p);repaint();OverridepublicvoidmouseMoved(MouseEvente)/TODOAuto-generatedmethodstubOverridepublicvoidmouseClicked(MouseEvente)/TODOAuto-generatedmethodstubOverridepublicvoidmouseEntered(MouseEvente)

23、/TODOAuto-generatedmethodstubOverridepublicvoidmouseExited(MouseEvente)/TODOAuto-generatedmethodstubWinToolBar.javapackagewinpaint;importjavaawt.Color;importjavaawt.eventActionEvent;importjavaawt.eventActionListener;importjavaawt.event.ItemEvent;importjavaawt.event.ItemListener;importjavax.swing.JBu

24、tton;importjavax.swing.JComboBox;importjavax.swing.JSeparator;importjavax.swing.JToolBar;publicclassWinToolBarextendsJToolBarimplementsActionListenerpublicstaticStringCommand=矩形；JButtonbtn1,btn2,btn3;/windowsPaintwinp;publicWinToolBar(windowsPaintwinP)btnl=newJButton(矩形);btn2=newJButton(圓形);btn3=newJButton(線);thisadd