java實(shí)驗(yàn)報(bào)告-簡(jiǎn)單計(jì)算器的編寫

-.z.JAVA實(shí)驗(yàn)報(bào)告——簡(jiǎn)單計(jì)算器的編寫班級(jí)：**：：一、實(shí)驗(yàn)?zāi)康?.掌握java圖形用戶界面（GUI)的設(shè)計(jì)原理和程序結(jié)構(gòu)2.能設(shè)計(jì)復(fù)核問(wèn)題要求的圖形用戶界面程序3.掌握常用組件的事件接口

4.應(yīng)用awt和swing組件進(jìn)行應(yīng)用程序設(shè)計(jì)二、實(shí)驗(yàn)條件1.計(jì)算機(jī)一臺(tái)2.java軟件開發(fā)環(huán)境三、實(shí)驗(yàn)步驟1、編寫代碼：mportjava.awt.*;importjava.awt.event.*;importjava*.swing.*;publicclassJCalculatore*tendsJFrameimplementsActionListener{privatestaticfinallongserialVersionUID=-7LprivateclassWindowClosere*tendsWindowAdapter{publicvoidwindowClosing(WindowEventwe){System.e*it(0);}}inti;privatefinalString[]str={"7","8","9","/","4","5","6","*","1","2","3","-",".","0","=","+"};utton[]buttons=newutton[str.length];uttonreset=newutton("CE");JTe*tFielddisplay=newJTe*tField("0");publicJCalculator(){super("Calculator");JPanelpanel1=newJPanel(newGridLayout(4,4));for(i=0;i<str.length;i++){buttons[i]=newutton(str[i]);panel1.add(buttons[i]);}JPanelpanel2=newJPanel(newBorderLayout());panel2.add("Center",display);panel2.add("East",reset);getContentPane().setLayout(newBorderLayout());getContentPane().add("North",panel2);getContentPane().add("Center",panel1);for(i=0;i<str.length;i++)buttons[i].addActionListener(this);reset.addActionListener(this);display.addActionListener(this);addWindowListener(newWindowCloser());setSize(800,800);setVisible(true);pack();}publicvoidactionPerformed(ActionEvente){Objecttarget=e.getSource();Stringlabel=e.getActionmand();if(target==reset)handleReset();elseif("0123456789.".inde*Of(label)>0)handleNumber(label);elsehandleOperator(label);}booleanisFirstDigit=true;publicvoidhandleNumber(Stringkey){if(isFirstDigit)display.setTe*t(key);elseif((key.equals("."))&&(display.getTe*t().inde*Of(".")<0))display.setTe*t(display.getTe*t()+".");elseif(!key.equals("."))display.setTe*t(display.getTe*t()+key);isFirstDigit=false;}publicvoidhandleReset(){display.setTe*t("0");isFirstDigit=true;operator="=";}doublenumber=0.0;Stringoperator="=";publicvoidhandleOperator(Stringkey){if(operator.equals("+"))number+=Double.valueOf(display.getTe*t());elseif(operator.equals("-"))number-=Double.valueOf(display.getTe*t());elseif(operator.equals("*"))number*=Double.valueOf(display.getTe*t());elseif(operator.equals("/"))number/=Double.valueOf(display.getTe*t());elseif(operator.equals("="))number=Double.valueOf(display.getTe*t());display.setTe*t(String.valueOf(number));operator=key;isFirstDigit=true;}publicstaticvoidmain(String[]args){newJCalculator();}}2、運(yùn)行結(jié)果，見(jiàn)截圖計(jì)算測(cè)試：123+456=579結(jié)果正確，程序無(wú)誤。計(jì)算測(cè)試：10*10*10=1000，結(jié)果正確，程序無(wú)誤。四、實(shí)驗(yàn)總結(jié)通過(guò)對(duì)計(jì)算器窗體的編寫我熟悉java圖形用戶界面的設(shè)計(jì)原理和程序結(jié)構(gòu)熟悉java