JAVA实验报告简单绘图程序精编

JAVA实验报告简单绘图

程序精编LeleWaSwrittenin2021实验三绘制图形一、实验目的学会JButton的使用，能进行JButton的基本操作,能使用JButton构造一个图形界面框架通过实验熟悉swing图形用户界面程序设计熟悉java中的事件处理模型，每个事件动作代表的意义进一步提高编程能力，学会独立思考，学会上网查找资料决问题。二、实验内容设计一个程序，该程序能够绘制基本的图形（包括圆形、矩形、直线等）；要求有一个简单易操作的用户界面（包括菜单、按钮等组件）。编写的程序要求能够实现保存和读取的功能。三、实验代码import;import;publicclassMain{/***@paramargs*/publicstaticvoidmain(String[]args){ewInstance();}catch(Exceptione){();}demo2=newRect().getClass();demo3=;"类名称"+());"类名称"+());"类名称"+());}}packagebase;importabstractclassGrapicsElem{Pointstart;Pointend;privateColorcolor;returncolor;}publicvoidsetColor(Colorcolor){=color;}publicvoidSetStart(Pointstart){=start;}publicvoidsetEnd(Pointend){=end;}publicabstractvoiddoMousePress(Pointp);publicabstractvoiddoMouseDrag(Pointp);publicabstractvoiddoMouseRelease(Pointp);publicabstractvoiddraw(Graphicsg);}packagebase;importclassLineextendsGrapicsElem{ArrayList<Point>track;publicLine(){track=newArrayList<Point>();}@Overridepublicvoiddraw(Graphicsg){for(inti=0;i<()-1;i++){Pointcur=(i);Pointnext=(i+1);,,,;}}privatevoidAddPoint(Pointp){(p);}@OverridepublicvoiddoMousePress(Pointp){//TODOAuto-generatedmethodstubAddPoint(p);}@OverridepublicvoiddoMouseDrag(Pointp){//TODOAuto-generatedmethodstubAddPoint(p);}@OverridepublicvoiddoMouseRelease(Pointp){//TODOAuto-generatedmethodstubAddPoint(p);}}packagebase;importclassRectextendsGrapicsElem{intx,y,width,height;@Overridepublicvoiddraw(Graphicsg){//TODOAuto-generatedmethodstub(getX(),getY(),getWidth(),getHeight());}@OverridepublicvoiddoMousePress(Pointp){(p);(p);}@OverridepublicvoiddoMouseDrag(Pointp){(p);}@OverridepublicvoiddoMouseRelease(Pointp){(p);}publicintgetX(){return,;}publicintgetY(){return,;}publicintgetWidth(){return}publicintgetHeight(){return}}packagebase;importclassCircleextendsRect{@Overridepublicvoiddraw(Graphicsg){//TODOAuto-generatedmethodstub(getX(),getY(),getWidth(),getHeight());}}packagewinpaint;import ;import;import;import;importclasswindowsPaintextendsJPanelimplementsMouseListener,MouseMotionListener{Stringcommand="矩形";List<GrapicsElem>Lg=newArrayList();GrapicsElemcur;JLabellabel;publicwindowsPaint(Stringtitle){init();}privatevoidinit(){addMouseListener(this);addMouseMotionListener(this);}/**可以使用反射去掉判断语句、Class<>g=("");();@return/privateGrapicsElemnewInstance(){command= ;1n"矩形")){returnnewRect();}elseif("圆形")){returnnewCircle();}elseif("线")){returnnewLine();}returnnull;}@Overridepublicvoidpaint(Graphicsg){//TODOAuto-generatedmethodstub(g);Graphics2Dg2d=(Graphics2D)g;//());// (newBasicStroke);for(inti=0;i<();i++){

GrapicsElemge=(i);(g);}}// @Override// publicvoidrepaint(){// //TODOAuto-generatedmethod stub// //TODOAuto-generatedmethodstub// //// ();//// Threadthread=newThread(newRunnable(){//// @Override//// publicvoidrun(){//// //TODOAuto-generatedmethodstub//// try{//// SaveToFile();//// }catch(IOExceptione){//////TODOAuto-generatedcatchblock////();////}////}////});////();////////ImageIconbg=newImageIcon("");////if(bg!=null){////if(label!=null)(label);////////label=newJLabel(bg);////(0,0,(),());////(label);//// ();//// }////// }privatevoidSaveToFile()throwsIOException{//TODOAuto-generatedmethodstubBufferedImagebimg=newBufferedImage(),(),;Graphics2Dg2d=();(g2d);(bimg,"jpg",newFile(""));}@OverridepublicvoidmousePressed(MouseEvente){Pointp=newPoint(),());cur=newInstance();(p);(cur);}@OverridepublicvoidmouseDragged(MouseEvente){Pointp=newPoint(),());(p);repaint();}@OverridepublicvoidmouseReleased(MouseEvente){Pointp=newPoint(),());(p);repaint();}@OverridepublicvoidmouseMoved(MouseEvente){//TODOAuto-generatedmethodstub}@OverridepublicvoidmouseClicked(MouseEvente){//TODOAuto-generatedmethodstub}@OverridepublicvoidmouseEntered(MouseEvente){//TODOAuto-generatedmethodstub}@OverridepublicvoidmouseExited(MouseEvente){//TODOAuto-generatedmethodstub}}packagewinpaint;import classWinToolBarextendsJToolBarimplementsActionListener{publicstaticStringCommand="矩形";JButtonbtn1,btn2,btn3;//windowsPaintwinp;publicWinToolBar(windowsPaintwinP){btn1=newJButto门("矩形")；btn2=newJButton("圆形”)；btn3=newJButton("线”)；(btn1);(btn2);(btn3);((ActionListener)this);((ActionListener)this);((ActionListener)this);//=winP;JComboBoxcom=newJComboBox();("红色");("蓝色");（"黑色"）(newItemListener(){@OverridepublicvoiditemStateChanged(It