Java实验四GUI简易计算器.docx

实验四GU1图形界面设计-实验要求1、掌握AWt与SWing的区别与联系;掌握SWing常用图像组件的使用；掌握主要的布局管理器的使用方法；2、了解事件处理机制；掌握SWing常用图像组件的使用;掌握固定菜单和弹出式菜单的创建和使用；二实验内容1、设计并实现一个类似于WindOWS操作系统附件中自带的计算器的一款简单的计算器,要求界面美观，设计合理；带有常用的菜单并实现其功能；能完成加、减、乘、除等简单的计算，在下面写出其核心代码。(1)源代码packagecom.ca1;importjava。awt。*；importjava×oswing0*;importjava。awt<.event0*;importjava。Uti1Stack：importjava.awtoGrid1ayout:c1assCaIextendsJFrameimp1ementsAction1istenerDTextFie1dshow=nu11;JPane1jp1,jp2;JButtonCjjia»jianjcheng,chu,equ,point;按钮清空力口，减，乘，除，等号，小数点JButtonb=new3Button10:按钮数组0-9栈控制标记位intf1ag=1;结果标记位intref1ag=0:pub1icCa1()创建组件jp1=newJPane1();jp2=newJPane1();show=newJTeXtFie1d(45);show.setFont(newFont("宋体"，Font。P1AIN,16);jia=newJButton("+");jian=newJButton(w-");cheng=newJBUtton("*");chunewJButton("/");equ=newJButton("=")；equoSetForeground(Co1or.RED);equ.setBackground(Co1or.GREEN)；point=newJBUttOn("。")：b=newJButton(,0");b1=newJButton(nIw)；b2=newJButton(,2")；b3=newJButton("3")：b4=newJButton("4")；b5=newJButton("5")；b6=newJButton(,6w);b7=newJButton(w7w);b8=newJButton(,8");b9=newJBUttOn("9");c=newJButton("C;CoSetForeground(Co1or.RED)；CoSetBaCkgrOUnd(CO1Or.YE11OW);CosetFont(newFOnt("黑体"，Font.P1I,15)；添加组件jp1(>add(show);jp1(>add(c);/show.SetEditab1e(fa1se);jp2,>add(b7)；jp2.add(b8);jp2<>add(b9);jp2.add(jia);jp2oadd(b4);jp2.add(b5)：jp2.add(b6)：jp2.add(jian)：jp2add(b1);jp2oadd(b2)：jp2.add(b3)；jp2.add(cheng);jp2.add(equ)；jp2.add(b);jp2oadd(point);jp20add(chu):jp2.Set1ayout(newGrid1ayout(4,4,3,3)：注册监听show.addAction1istener(this)：jia.addAction1istener(this)：jiaoaddAction1istener(this);cheng.addAction1istener(this)：chu.addAction1istener(this);equ<>addAction1istener(this);point.addActio1istener(this)；CoaddAction1istener(this)；for(inti=0：i<10；i+)(bi.addAction1istener(this)：)设置布局管理器this.add(jp1,Border1ayoutaNORTH)；thiSoadd(jp2)；设置窗体属性this.setTit1e("简易计算器“)；this.setSize(5。0,300);thiSoSet1OCatiOn(500,200)；thiSoSetDefau1tcioseOperation(JFramec.EXIT_ON_C1OSE);显示窗体this.setVisib1e(true);)©Overridepub1icvoidactionPerformed(ActionEvente)if(ref1ag=1&&e.getSource()!=equ)show.setTe×t("");if(ogetSource()=b0)(show.setTe×t(showogetText()+,0");f1ag=0;ref1ag=;e1seif(e.getSource()=b1)show.setText(showogetText()+,1");f1ag=0;ref1ag=;e1seif(e(>getSource()=b2)showosetText(show。getText()+w2w)；f1ag=0;ref1ag=0;e1seif(eogetSource()=b3)show.setText(show。getText()+,3");f1ag=0;ref1ag=0:e1seif(egetSource()=b4)(show.setText(show.getText()+"4");f1ag=。;ref1ag=0;e1seif(e.getSource()=b5)(show.setText(showogetText()+"5");f1ag=0;ref1ag=0;e1seif(e.getSource()=b6)(showosetText(show.getText()+,6,');f1ag=。;ref1ag=0;e1seif(ogetSource()=b7)(show,setText(showogetText()+,7")；f1ag=0;ref1ag=;e1seif(eogetSource()=b8)show.setText(show<.getText()+"8");f1ag=0:ref1ag=0;e1seif(e。getSource()=b9)showosetText(show.getTe×t()+,9");f1ag=0:ref1ag=0:操作符处理e1seif(e。getSource()=jia)(showosetTe×t(ShOWogetText()+w+w)；f1ag=1:ref1ag=0;e1seif(eogetSource()=jian)(show.setTe×t(ShOWogetText()+"-")；f1ag=1:ref1ag=0;e1seif(e.getSource()=cheng)(showosetText(Shoa。getText()+“*");f1ag=1:ref1ag=0;e1seif(e.getSource()=chu)(show.setText(show<,getText()+'7");f1ag=1:ref1ag=0;e1seif(e.getSource()=point)小数点只能按一次show.setTe×t(show.getText()；f1ag=1:ref1ag=0:)e1seif(e.getSource()=c)showosetText(,w);f1ag=1:ref1ag=0;计算结果并输出e1seStrings=show.getText()：1ength()-1)if(socharAt(s。1ength()-1)='/'Is»charAt(s<,s.charAt(s.1ength()-1)=,+iSocharAt(So1ength()-I)='-*)showCSetTeXt("符号不能放最后”)；e1seif(socharAt(s.1ength()-1)=,.,&&s。charAt(s.1ength()-2)=*.')show.setText(,pointsareboom");e1seshow.setText(w=w+SetSum(s);ref1ag=1;f1ag=1;)privatedoub1eSetSum(Stringst)(if(st。trim()="")return0：实例化用来存放操作数和操作符的栈并清空Stack<Object>SNUm=newStaCk()；Stack(Object)SOD=newStaCk();SNumoremoveA11E1ements();SOpoPemoveA11E1ements()：StringSnum=w"doub1e1num=0;chara1=st.charAt(st.1ength()-1);charb1=st。charAt(st.1ength()-2);for(inti=0：i(st.1ength();i+)(charc=st。charAt(i)；if(c=÷,Ic=,-f)Inum=Doub1eoparSeDoub1e(Snum);if(S0poempty()SNuiopush(Inum);e1se(switch(char)SOp0peek()case,+'：SNumopush(doub1e)SNum.pop()+1num)；SOppop();break;case'-,:SNumopush(doub1e)SNumopop()-Inum);SOpopop();break：case''：SNumopush(doub1e)SNum0pop()*Inum);SOp.pop()；break;case'/'：SNum.push(doub1e)SNum.pop()Inum)；SOp.pop();break;)将符号压入栈switch(c)case'+':S0p<>push('+');break；case,:SOp»pushbreak;Snum=>,w:)e1seif(c=,*'IIc=,)(Inum=Doub1eoprseDotb1e(Snum):if(SOp.emptyO)SNum(>push(Inum)；e1seif(a1=,&&b1=，.，)如果是整数，则去掉后面的小数点和showosetTe×t(String。vtuef(Math.round(Inum)：)switch(char)SOp0peek()(caseSNumo