Java程序設計-試驗3(學生版)

..實用文檔.實用文檔.華北電力大學實驗報告實驗名稱 Java程序面向?qū)ο笤O計〔二〕課程名稱 Java程序設計專業(yè)班級學 號：

學生姓名成 績：指導教師：張學斌 實驗日期：一、實驗目的及要求掌握類的繼承。掌握類的隱藏和覆蓋。掌握抽象類和抽象方法二、試驗內(nèi)容實驗1中國人、北京人和美國人實驗要求編寫程序模擬中國人、美國人是人，北京人是人。出主類外，程序中還有4個類ChinaPeoplAmericanPeopl和BeijingPeope要求如下：People類有權(quán)限是protecte的double型成員變量height和weightcspeakHellopublicvoidaverageHeihblicvoidaverageWeihChinaPeopl類是PeoplpublicvoidchinaGonguChinapeople重寫父類的publicvoidspeakHelicvoidaverageHeihblicvoidaverageWeight()方法。AmericanPeople類是People的子類，新增publicvoidamericanBoxing(方)法。要求Americanpeopl重寫父類的publicvoidspeakHelicvoidaverageHeihblicvoidaverageWeight法。BeijingPeope是ChinapeoplpublicvoidbeijingOprChinaPeople重寫父類的publicvoidspeakHelicvoidaverageHeihblicvoidaverageWeight()方法。程序模板publicclassPeople{protecteddoubleweight,height;publicvoidspeakHello(){System.out.println("yayayaya");}publicvoidaverageHeight(){height=173;System.out.println("averageheight:"+height);}publicvoidaverageWeight(){weight=70;System.out.println("averageweight:"+weight);}}publicclassChinaPeopleextendsPeoplepublicvoidspeakHello(){System.out.printn}publicvoidaverageHeight(){height=168.78;System.out.println(":"+height+"厘米");}【代碼1】//重寫publicvoidaverageWeight()方法，輸出:"中國人的平均體重：65公斤"publicvoidchinaGongfu(){System.out.println("坐如鐘,站如松,睡如弓");}}publicclassAmericanPeopleextendsPeople{【代碼2】//重寫publicvoidspeakHello()方法，輸出"Howdoyoudo"【代碼3】//重寫publicvoidaverageHeight()方法，輸出"American'saverageheight:176cm"publicvoidaverageWeight(){weight=75;System.out.println("American'saverageweight:"+weight+"kg");}publicvoidamericanBoxing(){System.out.println("直拳、鉤拳、組合拳");}}publicclassBeijingPeopleextendsChinaPeople{【代碼4】//重寫publicvoidaverageHeight()方法,輸出:"北京人的平均身高:172.5厘米"【代碼5】//重寫publicvoidaverageWeight()方法,輸出:"北京人的平均體重：70公斤"publicvoidbeijingOpera(){System.out.println("花臉、青衣、花旦和老生");}}publicclassExample{publicstaticvoidmain(Stringargs[]){ChinaPeoplechinaPeople=newChinaPeople();AmericanPeopleamericanPeople=newAmericanPeople();BeijingPeoplebeijingPeople=newBeijingPeople();chinaPeople.speakHello();americanPeople.speakHello();beijingPeople.speakHello();chinaPeople.averageHeight();americanPeople.averageHeight();beijingPeople.averageHeight();chinaPeople.averageWeight();americanPeople.averageWeight();beijingPeople.averageWeight();chinaPeople.chinaGongfu();americanPeople.americanBoxing();beijingPeople.beijingOpera();beijingPeople.chinaGongfu();}}實驗2銀行利息計算實驗要求假設銀行Bank()已經(jīng)有了按整年year計算利息的一般方法，其中year只能取正整數(shù)。比方按整年計算的方法：doublecomputerInterest(){interest=year**savedMoney;returninterest;}ConstructionBank是Bank法，即自己聲明一個doubleyear變量，比方，當year5.2165216天的利息，但希望首先按銀行BankcomputerInterest()5216天5.216的整數(shù)局部賦給隱藏的year，并讓super年計算利息的方法。要求ConstructionBank和BankOfDalian類是Bank類的子類，ConstructionBank和BankOfDalian都使用super調(diào)用隱藏的成員變量和方法。程序模板publicclassBank{intsavedMoney;intyear;doubleinterest;doubleinterestRate=0.29;publicdoublecomputerInterest(){interest=year*interestRate*savedMoney;returninterest;}publicvoidsetInterestRate(doublerate){interestRate=rate;}}publicclassConstructionBankextendsBank{doubleyear;publicdoublecomputerInterest()super.year=(int)year;doubler=year-(int)year;intday=(int)(r*1000);doubleyearInterest=【代碼1】//super調(diào)用隱藏的computerInterest()方法doubledayInterest=day*0.0001*savedMoney;interest=yearInterest+dayInterest;System.out.printf("%d元存在建設銀行%d年零%d天的利息:%f元\n",savedMoney,super.year,day,interest);returninterest;}}publicclassBankOfDalianextendsBank{doubleyear;publicdoublecomputerInterest()super.year=(int)year;doubler=year-(int)year;intday=(int)(r*1000);doubleyearInterest=【代碼2】//super調(diào)用隱藏的computerInterest()方法doubledayInterest=day*0.00012*savedMoney;interest=yearInterest+dayInterest;System.out.printf("%d元存在大連銀行%d年零%d天的利息:%f元\n",savedMoney,super.year,day,interest);returninterest;}}publicclassSaveMoney{publicstaticvoidmain(Stringargs[]){intamount=8000;ConstructionBankbank1=newConstructionBank();bank1.savedMoney=amount;bank1.year=8.236;bank1.setInterestRate(0.035);doubleinterest1=bank1 puterInterest();BankOfDalianbank2=newBankOfDalian();bank2.savedMoney=amount;bank2.year=8.236;bank2.setInterestRate(0.035);doubleinterest2=bank2 puterInterest();System.out.printf("兩個銀行利息相差%f元\n",interest2-interest1);}}實驗擴展80008236天的利息實驗3 公司支出的總薪水實驗要求有一個abstractEmployeeEmployee的子類有MonthWorker和YearWorker對象按年領取薪水，MonthWorker按月領取薪水，WeekWorkerEmployee類有一個abstract方法：Publicabstractearnings();子類必須重寫父類的earnings()方法給出各自領取報酬的具體公式。有一個Company類，該類用Employee對象數(shù)組作為成員，Employee對象數(shù)組的單元可以是YearWorker對象的向上轉(zhuǎn)型對象、MonthWorker對象的向上轉(zhuǎn)型對象或WeekWorker對象的向上轉(zhuǎn)型對象。程序能輸出Company對象一年需要支付的薪水總額。程序模板abstractclassEmployee{publicabstractdoubleearnings();}classYearWorkerextendsEmployee{1】//重寫earnings()方法}classMonthWorkerextendsEmployee{【代碼2】//重寫earnings()方法}classWeekWorkerextendsEmployee{【代碼3】//重寫earnings()方法。}classCompany{Employee[]employee;doublesalaries=0;Company(Employee[]employee){this.employee=employee;}publicdoublesalariesPay(){salaries=0;【代碼4】//計算salaries。returnsalaries;}}publicclassCompanySalary{publicstaticvoidmain(Stringargs[]){Employee[]employee=newEmployee[29];公司有29名雇for(inti=0;i<employee.length;i++){ //雇員簡單地分成三類if(i%3==0)employee[i]=newelseif(i%3==1)employee[i]=newMonthWorker();elseif(i%3==2)employee[i]=newYearWorker();}Companycompany=newCompany(employee);元}}實驗指導對于【代碼2】，一年按12個月計算出雇員的一年的年薪，比方：publicdoubleearnings(){return12*2300;}盡管