課程設(shè)計(jì)報(bào)告之計(jì)算器4800字

課程設(shè)計(jì)報(bào)告之計(jì)算器4800字

合肥工業(yè)大學(xué)課程設(shè)計(jì)設(shè)計(jì)題目計(jì)算器設(shè)計(jì)學(xué)生姓名學(xué)號專業(yè)班級電子商務(wù)指導(dǎo)教師聶會星2011年12月21日附頁：計(jì)算機(jī)源程序代碼：importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassCalculator1{publicstaticvoidmain(String[]args){ButtonFrameframe=newButtonFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.show();}}classButtonFrameextendsJFrameimplementsActionListener//繼承JFrame類,實(shí)現(xiàn)ActionListener接口{publicButtonFrame(){setTitle("Calculator");setSize(200,250);JPanelpanel=newJPanel();ContainercontentPane=getContentPane();//得到內(nèi)容框個對象contentPane.add(panel);JPaneltextPanel=newJPanel();addText=newJTextField("",16);addText.setHorizontalAlignment(JTextField.RIGHT);//設(shè)置文本的水平對齊方式textPanel.add(addText);contentPane.add(textPanel,BorderLayout.NORTH);addButton1=newJButton("1");addButton1.addActionListener(this);//將當(dāng)前對象實(shí)例作為動作的監(jiān)聽器addButton2=newJButton("2");addButton2.addActionListener(this);addButton3=newJButton("3");addButton3.addActionListener(this);addButton4=newJButton("4");addButton4.addActionListener(this);addButton5=newJButton("5");addButton5.addActionListener(this);addButton6=newJButton("6");addButton6.addActionListener(this);addButton7=newJButton("7");addButton7.addActionListener(this);addButton8=newJButton("8");addButton8.addActionListener(this);addButton9=newJButton("9");addButton9.addActionListener(this);addButton10=newJButton("0");addButton10.addActionListener(this);addButton11=newJButton("+");addButton11.addActionListener(this);addButton12=newJButton("-");addButton12.addActionListener(this);addButton13=newJButton("*");addButton13.addActionListener(this);addButton14=newJButton("/");addButton14.addActionListener(this);addButton15=newJButton("=");addButton15.addActionListener(this);addButton19=newJButton(".");addButton19.addActionListener(this);addButton20=newJButton("OFF");addButton20.addActionListener(this);addButton21=newJButton("ON");addButton21.addActionListener(this);panel.add(addButton20);panel.add(addButton21);panel.add(addButton1);panel.add(addButton2);panel.add(addButton3);panel.add(addButton11);panel.add(addButton4);panel.add(addButton5);panel.add(addButton6);panel.add(addButton12);panel.add(addButton7);panel.add(addButton8);panel.add(addButton9);panel.add(addButton13);panel.add(addButton10);panel.add(addButton19);panel.add(addButton15);panel.add(addButton14);}JTextFieldaddText;//單行文本輸入框JButtonaddButton1,addButton2,addButton3,addButton4,addButton5,addButton6,addButton7,addButton8,addButton9,addButton10,addButton11,addButton12,addButton13,addButton14,addButton15,addButton19,addButton20,addButton21;Stringz=newString("");doublem,k;charf;publicvoidactionPerformed(ActionEventa){Objects=a.getSource();//事件源捕獲窗口事件if(s==addButton1)z=z+"1";if(s==addButton2)z=z+"2";if(s==addButton3)z=z+"3";if(s==addButton4)z=z+"4";if(s==addButton5)z=z+"5";if(s==addButton6)z=z+"6";if(s==addButton7)z=z+"7";if(s==addButton8)z=z+"8";if(s==addButton9)z=z+"9";if(s==addButton10)z=z+"0";if(s==addButton19)z=z+".";if(s==addButton21)z="0";if(s==addButton20)z="";addText.setText(""+z);if(s==addButton11){f='+';m=Double.parseDouble(addText.getText().trim());//獲取文本內(nèi)容，并轉(zhuǎn)換為Double類型z="";}if(s==addButton12){f='-';m=Double.parseDouble(addText.getText().trim());z="";}if(s==addButton13){f='*';m=Double.parseDouble(addText.getText().trim());z="";}if(s==addButton14){f='/';m=Double.parseDouble(addText.getText().trim());z="";}if(s==addButton15){if(f=='+'){}if(f=='-'){}if(f=='*'){k=m*Double.parseDouble(addText.getText().trim());k=m-Double.parseDouble(addText.getText().trim());addText.setText(""+k);z="";k=m+Double.parseDouble(addText.getText().trim());addText.setText(""+k);z="";}}}addText.setText(""+k);z="";}if(f=='/'){k=m/Double.parseDouble(addText.getText().trim());addText.setText(""+k);z="";}

第二篇：Java帶計(jì)算過程的計(jì)算器課程設(shè)計(jì)報(bào)告17400字(2010--2011年度第1學(xué)期)Java程序設(shè)計(jì)課程設(shè)計(jì)報(bào)告保存計(jì)算過程的計(jì)算器專業(yè)網(wǎng)絡(luò)工程陸春燕B計(jì)算機(jī)0920970704211徐森20xx年1月13日學(xué)生姓名班學(xué)級號指導(dǎo)教師完成日期保存計(jì)算過程的計(jì)算器目錄1概述.................................................................11.1課程設(shè)計(jì)目的................................................11.2課程設(shè)計(jì)內(nèi)容................................................12系統(tǒng)需求分析.............................................................12.1系統(tǒng)目標(biāo)....................................................12.2主體功能....................................................12.3開發(fā)環(huán)境....................................................13系統(tǒng)概要設(shè)計(jì).............................................................13.1系統(tǒng)的功能模塊劃分..........................................13.2系統(tǒng)流程圖..................................................14系統(tǒng)詳細(xì)設(shè)計(jì)..............................................................25測試......................................................................65.1測試方案....................................................65.2測試結(jié)果....................................................66小結(jié)......................................................................6參考文獻(xiàn)...................................................................8附錄...................................................................9附錄1源程序清單.........................................................9保存計(jì)算過程的計(jì)算器1概述1.1課程設(shè)計(jì)目的1.掌握J(rèn)AVA語言編程的基礎(chǔ)知識并能熟練運(yùn)用。2.熟悉類聲明與對象的使用。3.理解委托時間處理模型。4.了解JAVA語言的圖形用戶界面JAVASWING的設(shè)計(jì)知識。5.運(yùn)用JAVASWING編寫簡單計(jì)算器程序，并實(shí)現(xiàn)其功能。1.2課程設(shè)計(jì)內(nèi)容?設(shè)計(jì)GUI界面的計(jì)算機(jī)程序，用戶可以通過鼠標(biāo)依次輸入?yún)⒓佑?jì)算的數(shù)值，進(jìn)行加，減，乘，除，等混合運(yùn)算。2系統(tǒng)需求分析2.1系統(tǒng)目標(biāo)一個簡單的計(jì)算器程序。用戶可以利用鼠標(biāo)點(diǎn)擊數(shù)值或操作符按鍵完成計(jì)算的輸入，計(jì)算的結(jié)果將被顯示在窗口上部的文本框中。2.2主體功能1.按下數(shù)字鍵在文本框上會顯示數(shù)字，這是計(jì)算器最基本的功能2.在任何時候按下“+-”鍵，計(jì)算器文本框上的數(shù)字置反3.上面一個文本框顯示計(jì)算過程，下面一個文本框顯示輸入的數(shù)字4.當(dāng)按下的運(yùn)算符號時前面已經(jīng)按下過運(yùn)算符號時，下面一個文本框顯示上一個運(yùn)算符號以及兩個數(shù)之間的運(yùn)算結(jié)果。5.按下清除“C”鍵，數(shù)據(jù)被全部清除。2.3開發(fā)環(huán)境JDK3系統(tǒng)概要設(shè)計(jì)3.1系統(tǒng)的功能模塊劃分1．主界面模塊2．事件相應(yīng)模塊3.2系統(tǒng)流程圖1保存計(jì)算過程的計(jì)算器4系統(tǒng)詳細(xì)設(shè)計(jì)1．主界面模塊詳細(xì)設(shè)計(jì)頂層容器：ComputerPad類實(shí)現(xiàn)主窗口,頂層容器中包含了1個panel容器，1個resultshow文本框，1個process文本框。各組件作用：其中panel容器用于放數(shù)字按鈕，小數(shù)點(diǎn)，運(yùn)算符按鈕，清零按鈕，正負(fù)轉(zhuǎn)換按鈕以及退格按鈕。兩個文本框一個用于顯示輸入數(shù)據(jù)和計(jì)算結(jié)果，另一個用于顯示計(jì)算過程。布局方式：頂層容器用BroadLayOut布局，process和resultshow文本框以及panel容器分別放在定岑容器的noth，center以及south面，panel容器用GridLayOut布局部分代碼如下數(shù)字按鈕類：實(shí)現(xiàn)數(shù)字按鈕的定義publicclassNumberButtonextendsButton{}運(yùn)算符按鈕類：實(shí)現(xiàn)運(yùn)算符號的定義publicclassOperationButtonextendsButton{}主窗口類實(shí)現(xiàn)監(jiān)視器的注冊，窗口布局，組件顏色大小等的設(shè)置publicclassComputerPadextendsFrameimplementsActionListener{NumberButtonnumberButton[];OperationButtonoprationButton[];Button小數(shù)點(diǎn)按鈕,正負(fù)號按鈕,退格按鈕,求倒數(shù)按鈕,等號按鈕,清零按鈕;2保存計(jì)算過程的計(jì)算器Panelpanel;JTextFieldresultShow;JTextFieldprocess;String運(yùn)算符號[]={"+","-","*","/"};LinkedList鏈表;boolean是否按下等號=false;publicComputerPad(){super("計(jì)算器");鏈表=newLinkedList();//進(jìn)行組件的聲明，初始化設(shè)置，注冊監(jiān)視器numberButton=newNumberButton[10];for(inti=0;i<=9;i++){numberButton[i]=newNumberButton(i);numberButton[i].addActionListener(this);}oprationButton=newOperationButton[4];for(inti=0;i<4;i++){oprationButton[i]=newOperationButton(運(yùn)算符號[i]);oprationButton[i].addActionListener(this);}小數(shù)點(diǎn)按鈕=newButton(".");正負(fù)號按鈕=newButton("+/-");等號按鈕=newButton("=");求倒數(shù)按鈕=newButton("1/x");退格按鈕=newButton("退格");清零按鈕=newButton("C");清零按鈕.setForeground(Color.red);退格按鈕.setForeground(Color.red);等號按鈕.setForeground(Color.red);求倒數(shù)按鈕.setForeground(Color.blue);正負(fù)號按鈕.setForeground(Color.blue);小數(shù)點(diǎn)按鈕.setForeground(Color.blue);退格按鈕.addActionListener(this);清零按鈕.addActionListener(this);等號按鈕.addActionListener(this);小數(shù)點(diǎn)按鈕.addActionListener(this);正負(fù)號按鈕.addActionListener(this);求倒數(shù)按鈕.addActionListener(this);//對顯示過程的文本框進(jìn)行設(shè)置process=newJTextField(10);process.setHorizontalAlignment(JTextField.LEFT);process.setForeground(Color.blue);process.setFont(newFont("TimesRoman",Font.PLAIN,14));process.setBorder(newSoftBevelBorder(BevelBorder.LOWERED));3保存計(jì)算過程的計(jì)算器process.setBackground(Color.white);process.setEditable(false);//對顯示輸入值以及運(yùn)算結(jié)果的文本框進(jìn)行設(shè)置resultShow=newJTextField(10);resultShow.setHorizontalAlignment(JTextField.RIGHT);resultShow.setForeground(Color.blue);resultShow.setFont(newFont("TimesRoman",Font.PLAIN,14));resultShow.setBorder(newSoftBevelBorder(BevelBorder.LOWERED));resultShow.setBackground(Color.white);resultShow.setEditable(false);//進(jìn)行主窗口布局panel=newPanel();panel.setLayout(newGridLayout(5,4));Panel.add(清零按鈕);Panel.add(退格按鈕);panel.add(numberButton[1]);panel.add(numberButton[2]);panel.add(numberButton[3]);Panel.add(numberButton[4]);panel.add(numberButton[5]);panel.add(numberButton[6]);Panel.add(numberButton[7]);panel.add(numberButton[8]);panel.add(numberButton[9]);Panel.add(numberButton[0]);Panel.add(oprationButton[0]);panel.add(oprationButton[1]);panel.add(oprationButton[2]);panel.add(oprationButton[3]);panel.add(求倒數(shù)按鈕);panel.add(正負(fù)號按鈕);panel.add(小數(shù)點(diǎn)按鈕);Panel.add(等號按鈕);add(panel,BorderLayout.SOUTH);add(resultShow,BorderLayout.CENTER);add(process,BorderLayout.NORTH);addWindowListener(newWindowAdapter(){publicvoidwindowClosing(WindowEvente){System.exit(0);}});setVisible(true);setBounds(100,50,170,190);setResizable(false);validate();}2．事件響應(yīng)模塊詳細(xì)設(shè)計(jì)4保存計(jì)算過程的計(jì)算器模塊功能：事件響應(yīng)模塊用于實(shí)現(xiàn)數(shù)據(jù)輸入，保存，運(yùn)算以及顯示。具體實(shí)現(xiàn)：將主窗口作為窗口中所有組件的監(jiān)視器，鏈表用來存儲輸入的數(shù)字以及操作符以便運(yùn)算時提取出來，監(jiān)視器用if，elseif語句分?jǐn)?shù)字按鈕，小數(shù)點(diǎn)，運(yùn)算符按鈕，清零按鈕，正負(fù)轉(zhuǎn)換按鈕以及退格按鈕6種情況進(jìn)行相應(yīng)處理，其中除了清零按鈕每種情況又分成鏈表長度為1，2，3作相應(yīng)的處理。事件響應(yīng)模塊的框架代碼如下publicvoidactionPerformed(ActionEvente){按下數(shù)字按鈕時的事件處理if(e.getSource()instanceofNumberButton){NumberButtonb=(NumberButton)e.getSource();if(鏈表.size()==0){}elseif(鏈表.size()==1&&是否按下等號==false){}elseif(鏈表.size()==1&&是否按下等號==true){}elseif(鏈表.size()==2){}elseif(鏈表.size()==3){}}//按下運(yùn)算符號時的事件處理elseif(e.getSource()instanceofOperationButton){OperationButtonb=(OperationButton)e.getSource();if(鏈表.size()==1){}elseif(鏈表.size()==2){}elseif(鏈表.size()==3){}}//按下等號后的事件處理elseif(e.getSource()==等號按鈕){是否按下等號=true;if(鏈表.size()==1||鏈表.size()==2){}elseif(鏈表.size()==3){}}//按下小數(shù)點(diǎn)后的事件處理elseif(e.getSource()==小數(shù)點(diǎn)按鈕){if(鏈表.size()==0){}elseif(鏈表.size()==1){}elseif(鏈表.size()==3){}}//按下退格鍵后的事件處理elseif(e.getSource()==退格按鈕){if(鏈表.size()==1){}elseif(鏈表.size()==3){}}//按下正負(fù)號后的事件處理5保存計(jì)算過程的計(jì)算器elseif(e.getSource()==正負(fù)號按鈕){if(鏈表.size()==1){}elseif(鏈表.size()==3){}}//按下求倒數(shù)按鈕后的事件處理elseif(e.getSource()==求倒數(shù)按鈕){if(鏈表.size()==1||鏈表.size()==2){}elseif(鏈表.size()==3){}}//按下清零按鈕后的事件處理elseif(e.getSource()==清零按鈕){}}}5測試5.1測試方案進(jìn)行各種情況的輸入檢測進(jìn)行加，減，乘，除運(yùn)算，數(shù)字很大，小數(shù)，整數(shù)以及先按下“=”等非法輸入情況。5.2測試結(jié)果程序正常的響應(yīng)按鈕事件，能顯示計(jì)算過程，當(dāng)運(yùn)算結(jié)果很大時用科學(xué)記數(shù)法顯示運(yùn)算結(jié)果6小結(jié)在做本項(xiàng)目是時候，會遇到很多問題，最大的問題的如何保存已經(jīng)輸入的數(shù)字6保存計(jì)算過程的計(jì)算器或者符號進(jìn)行運(yùn)算，如何顯示運(yùn)算過程，經(jīng)過多次研究和查詢發(fā)現(xiàn)運(yùn)可以運(yùn)用鏈表進(jìn)行存儲和提取數(shù)據(jù)，用棧也是可以的。此次課程設(shè)計(jì)讓我更了解熟悉了Java中的圖形用戶界面和它的編程方式。在完成課題的過程中也不斷充實(shí)了自己，學(xué)習(xí)到了很多以前沒有學(xué)習(xí)到的知識，收獲很大。最大的收獲是在彎完成過程中培養(yǎng)的解決問題的能力，在做項(xiàng)目時必然會遇到困難，會有不會的東西，重要的不是現(xiàn)在會不會，而是遇到問題知道如何找到解決的途徑。還使我對所學(xué)知識能夠融會貫通，又不斷豐富了新知識。Java計(jì)算器設(shè)計(jì)使得我們對所學(xué)的專業(yè)課有了更為深刻的認(rèn)識，使得知識得到了鞏固和提高。7保存計(jì)算過程的計(jì)算器參考文獻(xiàn)[1]耿祥義,張躍平.Java2實(shí)用教程(第三版)[M].北京：清華大學(xué)出版社，2006[2]耿祥義.Java課程設(shè)計(jì)(第三版)[M].北京：清華大學(xué)出版社，2004[3]張躍平.Java2實(shí)用教程實(shí)驗(yàn)指導(dǎo)與習(xí)題解答（第三版）[M].北京：清華大學(xué)出版社，20048保存計(jì)算過程的計(jì)算器附錄附錄1源程序清單NumberButton.javaimportjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassNumberButtonextendsButton{intnumber;publicNumberButton(intnumber){super(""+number);this.number=number;setForeground(Color.blue);}publicintgetNumber(){returnnumber;}}OperateButton.javaimportjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassOperationButtonextendsButton{String運(yùn)算符號;publicOperationButton(Strings){super(s);運(yùn)算符號=s;setForeground(Color.red);}publicStringget運(yùn)算符號(){return運(yùn)算符號;}}ComputerPad.javaimportjava.awt.*;importjava.awt.event.*;importjavax.swing.*;importjavax.swing.border.*;importjava.util.LinkedList;importjava.text.NumberFormat;9保存計(jì)算過程的計(jì)算器publicclassComputerPadextendsFrameimplementsActionListener{NumberButtonnumberButton[];OperationButtonoprationButton[];Button小數(shù)點(diǎn)按鈕,正負(fù)號按鈕,退格按鈕,求倒數(shù)按鈕,等號按鈕,清零按鈕;Panelpanel;JTextFieldresultShow;JTextFieldprocess;String運(yùn)算符號[]={"+","-","*","/"};LinkedList鏈表;boolean是否按下等號=false;publicComputerPad(){super("計(jì)算器");鏈表=newLinkedList();numberButton=newNumberButton[10];for(inti=0;i<=9;i++){numberButton[i]=newNumberButton(i);numberButton[i].addActionListener(this);}oprationButton=newOperationButton[4];for(inti=0;i<4;i++){oprationButton[i]=newOperationButton(運(yùn)算符號[i]);oprationButton[i].addActionListener(this);}小數(shù)點(diǎn)按鈕=newButton(".");正負(fù)號按鈕=newButton("+/-");等號按鈕=newButton("=");求倒數(shù)按鈕=newButton("1/x");退格按鈕=newButton("退格");清零按鈕=newButton("C");清零按鈕.setForeground(Color.red);退格按鈕.setForeground(Color.red);等號按鈕.setForeground(Color.red);求倒數(shù)按鈕.setForeground(Color.blue);正負(fù)號按鈕.setForeground(Color.blue);小數(shù)點(diǎn)按鈕.setForeground(Color.blue);退格按鈕.addActionListener(this);清零按鈕.addActionListener(this);等號按鈕.addActionListener(this);小數(shù)點(diǎn)按鈕.addActionListener(this);正負(fù)號按鈕.addActionListener(this);求倒數(shù)按鈕.addActionListener(this);10保存計(jì)算過程的計(jì)算器process=newJTextField(10);process.setHorizontalAlignment(JTextField.LEFT);process.setForeground(Color.blue);process.setFont(newFont("TimesRoman",Font.PLAIN,14));process.setBorder(newSoftBevelBorder(BevelBorder.LOWERED));process.setBackground(Color.white);process.setEditable(false);resultShow=newJTextField(10);resultShow.setHorizontalAlignment(JTextField.RIGHT);resultShow.setForeground(Color.blue);resultShow.setFont(newFont("TimesRoman",Font.PLAIN,14));resultShow.setBorder(newSoftBevelBorder(BevelBorder.LOWERED));resultShow.setBackground(Color.white);resultShow.setEditable(false);panel=newPanel();panel.setLayout(newGridLayout(5,4));Panel.add(清零按鈕);Panel.add(退格按鈕);panel.add(numberButton[1]);panel.add(numberButton[2]);panel.add(numberButton[3]);Panel.add(numberButton[4]);panel.add(numberButton[5]);panel.add(numberButton[6]);Panel.add(numberButton[7]);panel.add(numberButton[8]);panel.add(numberButton[9]);Panel.add(numberButton[0]);Panel.add(oprationButton[0]);panel.add(oprationButton[1]);panel.add(oprationButton[2]);panel.add(oprationButton[3]);panel.add(求倒數(shù)按鈕);panel.add(正負(fù)號按鈕);panel.add(小數(shù)點(diǎn)按鈕);Panel.add(等號按鈕);add(panel,BorderLayout.SOUTH);add(resultShow,BorderLayout.CENTER);add(process,BorderLayout.NORTH);addWindowListener(newWindowAdapter(){publicvoidwindowClosing(WindowEvente){System.exit(0);}});setVisible(true);setBounds(100,50,170,190);setResizable(false);11保存計(jì)算過程的計(jì)算器validate();}publicvoidactionPerformed(ActionEvente){if(e.getSource()instanceofNumberButton){NumberButtonb=(NumberButton)e.getSource();if(鏈表.size()==0){intnumber=b.getNumber();鏈表.add(""+number);resultShow.setText(""+number);process.setText(""+number);是否按下等號=false;}elseif(鏈表.size()==1&&是否按下等號==false){intnumber=b.getNumber();Stringnum=(String)鏈表.getFirst();Strings=num.concat(""+number);鏈表.set(0,s);resultShow.setText(s);process.setText(s);}elseif(鏈表.size()==1&&是否按下等號==true){intnumber=b.getNumber();鏈表.removeFirst();鏈表.add(""+number);是否按下等號=false;resultShow.setText(""+number);process.setText(""+number);}elseif(鏈表.size()==2){intnumber=b.getNumber();鏈表.add(""+number);resultShow.setText(""+number);process.setText(""+((String)鏈表.get(0))+((String)鏈表.get(1))+number);}elseif(鏈表.size()==3){intnumber=b.getNumber();12保存計(jì)算過程的計(jì)算器Stringnum=(String)鏈表.getLast();Strings=num.concat(""+number);process.setText(""+((String)鏈表.get(0))+((String)鏈表.get(1))+((String)鏈表.get(2))+number);鏈表.set(2,s);resultShow.setText(s);}}elseif(e.getSource()instanceofOperationButton){OperationButtonb=(OperationButton)e.getSource();if(鏈表.size()==1){Stringfuhao=b.get運(yùn)算符號();process.setText(""+((String)鏈表.get(0))+fuhao);鏈表.add(fuhao);}elseif(鏈表.size()==2){Stringfuhao=b.get運(yùn)算符號();鏈表.set(1,fuhao);process.setText(""+((String)鏈表.get(0))+((String)鏈表.get(1)));}elseif(鏈表.size()==3){Stringfuhao=b.get運(yùn)算符號();Stringnumber1=(String)鏈表.getFirst();Stringnumber2=(String)鏈表.getLast();String運(yùn)算符號=(String)鏈表.get(1);process.setText(""+((String)鏈表.get(0))+((String)鏈表.get(1))+((String)鏈表.get(2))+運(yùn)算符號);try{doublen1=Double.parseDouble(number1);doublen2=Double.parseDouble(number2);doublen=0;if(運(yùn)算符號.equals("+")){n=n1+n2;}elseif(運(yùn)算符號.equals("-")){n=n1-n2;}elseif(運(yùn)算符號.equals("*"))13保存計(jì)算過程的計(jì)算器{n=n1*n2;}elseif(運(yùn)算符號.equals("/")){n=n1/n2;}鏈表.clear();鏈表.add(""+n);鏈表.add(fuhao);resultShow.setText(""+n);}catch(Exceptionee){}}}elseif(e.getSource()==等號按鈕){是否按下等號=true;if(鏈表.size()==1||鏈表.size()==2){Stringnum=(String)鏈表.getFirst();resultShow.setText(""+num);process.setText(num+"=");}elseif(鏈表.size()==3){Stringnumber1=(String)鏈表.getFirst();Stringnumber2=(String)鏈表.getLast();String運(yùn)算符號=(String)鏈表.get(1);process.setText(""+((String)鏈表.get(0))+((String)鏈表.get(1))+((String)鏈表.get(2))+"=");try{doublen1=Double.parseDouble(number1);doublen2=Double.parseDouble(number2);doublen=0;if(運(yùn)算符號.equals("+")){n=n1+n2;}elseif(運(yùn)算符號.equals("-")){n=n1-n2;}14保存計(jì)算過程的計(jì)算器elseif(運(yùn)算符號.equals("*")){n=n1*n2;}elseif(運(yùn)算符號.equals("/")){n=n1/n2;}resultShow.setText(""+n);鏈表.set(0,""+n);鏈表.removeLast();鏈表.removeLast();}catch(Exceptionee){}}}elseif(e.getSource()==小數(shù)點(diǎn)按鈕){if(鏈表.size()==0){是否按下等號=false;}elseif(鏈表.size()==1){Stringdot=小數(shù)點(diǎn)按鈕.getLabel();Stringnum=(String)鏈表.getFirst();Strings=null;if(num.indexOf(dot)==-1){s=num.concat(dot);鏈表.set(0,s);}else{s=num;}鏈表.set(0,s);resultShow.setText(s);process.setText(s);}elseif(鏈表.size()==3){Stringdot=小數(shù)點(diǎn)按鈕.getLabel();Stringnum=(String)鏈表.getLast();15保存計(jì)算過程的計(jì)算器Strings=null;if(num.indexOf(dot)==-1){s=num.concat(dot);鏈表.set(2,s);}else{s=num;}resultShow.se