實驗五-繼承與接口

1、實驗五繼承與接口實驗目的1、掌握類的繼承細節(jié)內容，包括子類的繼承、子類對象創(chuàng)建、成員變量的繼承與隱藏、方法的繼承與重寫2、掌握重寫的目的以及怎樣使用super關鍵字3、掌握上轉型對象與接口回調技術4、掌握類怎樣實現(xiàn)接口，及面向接口的編程思想實驗內容1、根據(jù)附錄里的源代碼，按照注釋要求，完成代碼填空，使程序能夠運行得出結果。1）實驗1中國人與美國人2）實驗2銀行與利息3）實驗3面積之和4）實驗4歌手大賽5）實驗5天氣預報2、設計編寫程序完成以下任務。1）根據(jù)要求修改實驗2，參照建設銀行再編寫一個商業(yè)銀行（廣發(fā)行），讓程序輸出8000元在廣發(fā)行8年零212天的利息。2）根據(jù)要求修改實驗3,再增加一

2、種幾何圖形（梯形），并讓主類中的tuxing的某些元素是梯形的上轉型對象。3）仿照實驗5編寫一個程序實現(xiàn)模擬水杯中的水在不同溫度下可能出現(xiàn)的狀態(tài)。4）編寫一個接口并創(chuàng)建兩個實現(xiàn)該接口的類A、B。A、B類實現(xiàn)了接口的f方法，A類的f方法內容為計算1!+3!+5!+9!并返回結果，B類的f方法內容為計算2!+4!+6!+10!也返回結果；再編一個執(zhí)行類，執(zhí)行類運行時要求通過接口回調方式用同一個對象實例分別調用A類的f方法和B類的f方法。5）（1）定義一個汽車類Vehicle，要求如下：（知識點：類的繼承方法的覆蓋）（a）屬性包括：汽車品牌brand（String類型）、顏色color（String

3、類型）和速度speed（double類型）。（b）至少提供一個有參的構造方法（要求品牌和顏色可以初始化為任意值，但速度的初始值必須為0）。（c）為屬性提供訪問器方法。注意：汽車品牌一旦初始化之后不能修改。（d）定義一個一般方法run（），用打印語句描述汽車奔跑的功能。定義測試類VehicleTest，在其main方法中創(chuàng)建一個品牌為“benz”、顏色為“black”的汽車。（2）定義一個Vehicle類的子類轎車類Car，要求如下：（a）轎車有自己的屬性載人數(shù)loader（int類型）。（b）提供該類初始化屬性的構造方法。（c）重新定義run（），用打印語句描述轎車奔跑的功能。(d)定義測試類

4、Test,在其main方法中創(chuàng)建一個品牌為“Honda”、顏色為“red”，載人數(shù)為2人的轎車。面向對象基礎出過類似的，這個把繼承引入了6)Cola公司的雇員分為以下若干類：(知識點：多態(tài))ColaEmployee：這是所有員工總的父類，屬性：員工的姓名,員工的生日月份。方法：getSalary(intmonth)根據(jù)參數(shù)月份來確定工資，如果該月員工過生日，則公司會額外獎勵100元。SalariedEmployee：ColaEmployee的子類，拿固定工資的員工。屬性：月薪HourlyEmployee：ColaEmployee的子類，按小時拿工資的員工，每月工作超出160小時的部分按照1.5

5、倍工資發(fā)放。屬性：每小時的工資、每月工作的小時數(shù)SalesEmployee：ColaEmployee的子類，銷售人員，工資由月銷售額和提成率決定。屬性：月銷售額、提成率(5)定義一個類Company，在該類中寫一個方法，調用該方法可以打印出某月某個員工的工資數(shù)額，寫一個測試類TestCompany,在main方法，把若干各種類型的員工放在一個ColaEmployee數(shù)組里，并單元出數(shù)組中每個員工當月的工資。知識點：繼承與多態(tài)7)利用接口實現(xiàn)動態(tài)的創(chuàng)建對象：(知識點：接口)(1)創(chuàng)建4個類1蘋果2香蕉3葡萄4園丁(2)在三種水果的構造方法中打印一句話.以蘋果類為例classapplepublic

6、apple()System.out.println(“創(chuàng)建了一個蘋果類的對象”);(3)類圖如下：FruitPmrGardener+create():Fruit(4)要求從控制臺輸入一個字符串，根據(jù)字符串的值來判斷創(chuàng)建三種水果中哪個類的對象。運行結果如圖：FilsSd.itScEefaatarHavigate打3rdb電m=Jay-doc|lJeclaratimtestJivaApplicationC：IiHrtsr蘋果另痛了一個幸果的對象.實驗步驟實驗一、1實驗一、2Problems璘Javadoc良DechraftiomiSaveMoneyJavaApplicationE:MyEc呂的元看

7、在史金曼行呂正隼235五的*電24Z8.呂M仔仔0元的的五號在立逢汽行呂三筆235五的利奧二2%66,5600&x西館行私也tl舒7,7觸晅0元實驗一、3實驗一、4實驗一、5實驗二、1packageSFirst;publicclassBankintsavedMoney;intyear;doubleinterest;doubleinterestRate=0.29;publicdoublecomputerInterest()interest=year*interestRate*savedMoney;returninterest;publicvoidsetInterestRate(doublerat

8、e)interestRate=rate;)packageSFirst;publicclassGuangFaBankextendsBank(doubleyear;publicdoublecomputerlnterest()super.year=(int)year;doubler=year-(int)year;intday=(int)(r*1000);doubleyearInterest=puterInterest();/【代碼1】/super調用隱藏的computerInterest()方法doubledayInterest=day*0.0001*savedMoney;interest=year

9、Interest+dayInterest;returninterest;packageSFirst;publicclassSaveMoneypublicstaticvoidmain(Stringargs)intamount=8000;GuangFaBankbank1=newGuangFaBank();bank1.savedMoney=amount;bank1.year=8.212;bank1.setInterestRate(0.035);doubleinterest1=puterInterest();System.out.println(8000元在廣發(fā)行8年零212天的利息為:+intere

10、st1);實驗結果弒Problems:蘇Javadoc陶DeclarationcterminatedSaveMoney1JavaAppliestio記左廣及H目容隼212王第尼電拈:248.8實驗二、2packageSSecond;publicabstractclassGeometrypublicabstractdoublegetArea();)packageSSecond;publicclassMainClasspublicstaticvoidmain(Stringargs)Trapezoidtuxing=newTrapezoid(4.7,7.9,7);/有29個Geometry對象doub

11、les=tuxing.getArea();System.out.printf(梯形的面積為：s);)packageSSecond;publicclassTrapezoidextendsGeometry(doublea,b,h;Trapezoid(doublea,doubleb,doubleh)this.a=a;this.b=b;this.h=h;)/【代碼2】/重寫getArea()方法OverridepublicdoublegetArea()/TODOAuto-generatedmethodstubreturn(a+b)*h/2;)實驗結果Problenns璘JavadocMainChss弊

12、馬第面程出二44.1000實驗二、3packageSThird;publicclassBoiledStateimplementsWaterStateOverridepublicvoidshowState()/TODOAuto-generatedmethodstubSystem.out.println(開水。);/【代碼3】/重寫publicvoidshowState()方法packageSThird;publicclassIceStateimplementsWaterStatepublicvoidshowState()System.out.print(結冰。);packageSThird;pu

13、blicclassLittleWarmStateimplementsWaterState/【代碼1】/重寫publicvoidshowState()方法OverridepublicvoidshowState()/TODOAuto-generatedmethodstubSystem.out.println(微涼。)；packageSThird;publicclassWarmStateimplementsWaterStateOverridepublicvoidshowState()/TODOAuto-generatedmethodstubSystem.out.println(溫水。);/【代碼2】

14、/重寫publicvoidshowState()方法packageSThird;publicclassWaterWaterStatestate;publicvoidshow()state.showState();publicvoidsetState(WaterStates)state=s;)packageSThird;publicclassWaterForecastpublicstaticvoidmain(Stringargs)WaterwaterState=newWater。；System.out.print(n溫度在90-100時水杯水的狀態(tài)：);waterState.setState(n

15、ewBoiledState();waterState.show。；System.out.print(n溫度在50-80時水杯水的狀態(tài)：);waterState.setState(newWarmState();waterState.show。；System.out.print(n溫度在30-50時水杯水的狀態(tài)：);waterState.setState(newLittleWarmState();waterState.show。；System.out.print(n溫度在0度下時水杯水的狀態(tài)：”)；waterState.setState(newIceState();waterState.show。

16、；)packageSThird;publicinterfaceWaterStatepublicvoidshowState();)實驗結果且FProblems*Javadoc電DeclarationterminatedWaterForecastJavaApplicationE:MyEcl蔡豆在9好-1隨寸水杯的找在：開忒.之中及5。-呂64水樨水的根在：荒水.意宜空39-5團外水杯笊的壯耳,徵近.I施宜在有哎下才正朽水的就右：溶述，packageSForth;publicclassAimplementsobjectpublicintf(inta,intb)intsum=0,temp=1;for(

17、inti=a;i=b;i=i+2)for(intj=1;j=i;j+)temp*=j;sum+=temp;temp=1;returnsum;packageSForth;publicclassBimplementsobjectpublicintf(inta,intb)intsum=0,temp=1;for(inti=a;i=b;i=i+2)for(intj=1;jTest4JavaApplicationEEcliebinarycc1：H-3lH-5!.+9!的媽用=3680472l4-4：4-0!的洛原有：3669B6-6實驗五packageSFifth;publicclassCarextend

18、sVehicleintloader;publicCar(Stringbrand,Stringcolor,doublespeed,intl)super(brand,color,speed);this.loader=l;/TODOAuto-generatedconstructorstubpublicvoidrun()System.out.println(顏色為+super.getColor()+的+super.getBrand()+汽車的時速為：+super.getSpeed();packageSFifth;publicclassTestpublicstaticvoidmain(Stringarg

19、s)/TODOAuto-generatedmethodstubCarc=newCar(Honda,red”,300.0,20);c.run();packageSFifth;publicclassVehicleprivateStringbrand=BMW;/汽車品牌privateStringcolor=red;/汽車顏色privatedoublespeed=0;/汽車時速publicStringgetColor()returncolor;publicvoidsetColor(Stringcolor)this.color=color;publicdoublegetSpeed()returnspee

20、d;publicvoidsetSpeed(doublespeed)this.speed=speed;publicStringgetBrand()returnbrand;publicVehicle(Stringbrand,Stringcolor,doublespeed)/TODOAuto-generatedconstructorstubthis.brand=brand;this.color=color;this.speed=speed;publicvoidrun()System.out.println(brand+汽車的時速為:+speed);packageSFifth;publicclassV

21、ehicleTestpublicstaticvoidmain(Stringargs)/TODOAuto-generatedmethodstubVehiclev=newVehicle(benz,black,200.0);v.run();)實驗結果Problems濡Jg己dot篇DeH日VehicleTest1Javaben普工事的甘雙燈二2&9.0實驗六packageSSixth;publicclassColaEmployeeStringname;/員工姓名intmonth;/員工生日月份publicStringgetName()returnname;publicvoidsetName(Stri

22、ngname)=name;publicintgetMonth()returnmonth;publicvoidsetMonth(intmonth)this.month=month;intgetSalary(intmonth)if(month=this.month)return100;elsereturn0;packageSSixth;publicclassCompanyextendsColaEmployeevoidprint(Stringname,doublesalary,intmonth)StringName=name;doubleSalary=salary;intMonth=month;Sy

23、stem.out.println(員工+Name+在+Month+月+的薪資為：+Salary);packageSSixth;publicclassHourlyEmployeeextendsColaEmployeedoublehours;/每月工作的時間doublehsalary;/每小時的工資Companyc=newCompany();publicHourlyEmployee(Stringname,intmonth,doublehours,doublehsalary)/TODOAuto-generatedconstructorstubthis.hours=hours;this.hsalary

24、=hsalary;this.month=month;=name;publicdoublegetHours()returnhours;publicvoidsetHours(doublehours)this.hours=hours;publicdoublegetHsalary()returnhsalary;publicvoidsetHsalary(doublehsalary)this.hsalary=hsalary;publicintgetSalary(intmonth)if(this.hours=160)this.hsalary=this.hsalary*this.hours+super.get

25、Salary(month);c.print(name,hsalary,month);return0;elsethis.hsalary=(this.hours-160)*this.hsalary*1.5+160*this.hsalary+super.getSalary(month);c.print(name,hsalary,month);return0;packageSSixth;publicclassSalariedEmployeeextendsColaEmployeedoublesalary;/員工固定薪資(按月)Companyc=newCompany();publicSalariedEmp

26、loyee(Stringname,intmonth,doublesalary)/TODOAuto-generatedconstructorstub=name;this.month=month;this.salary=salary;publicintgetSalary(intmonth)this.salary=salary+super.getSalary(month);c.print(name,salary,month);return0;packageSSixth;publicclassSalesEmployeeextendsColaEmployeedoublemoney;/月銷售額double

27、ticheng;/提成率Companyc=newCompany();publicSalesEmployee(Stringname,intmonth,doublemoney,doubleticheng)/TODOAuto-generatedconstructorstubthis.money=money;this.month=month;=name;this.ticheng=ticheng;publicdoublegetMoney()returnmoney;publicvoidsetMoney(doublemoney)this.money=money;publicdoublegetTicheng(

28、)returnticheng;publicvoidsetTicheng(doubleticheng)this.ticheng=ticheng;publicintgetSalary(intmonth)this.money=money+super.getSalary(month)+(money*ticheng);c.print(name,money,month);return0;packageSSixth;publicclassSalesEmployeeextendsColaEmployeedoublemoney;/月銷售額doubleticheng;/提成率Companyc=newCompany

29、();publicSalesEmployee(Stringname,intmonth,doublemoney,doubleticheng)/TODOAuto-generatedconstructorstubthis.money=money;this.month=month;=name;this.ticheng=ticheng;publicdoublegetMoney()returnmoney;publicvoidsetMoney(doublemoney)this.money=money;publicdoublegetTicheng()returnticheng;)publicvoidsetTi

30、cheng(doubleticheng)this.ticheng=ticheng;)publicintgetSalary(intmonth)this.money=money+super.getSalary(month)+(money*ticheng);c.print(name,money,month);return0;)packageSSixth;publicclassTestcompanypublicstaticvoidmain(Stringargs)/TODOAuto-generatedmethodstubColaEmployeece=newColaEmployee3;ce0=newSal

31、ariedEmployee(aa”,9,3000.0);ce1=newHourlyEmployee(bb”,3,2000.0,180);ce2=newSalesEmployee(cc”,6,6000,0.3);ce0.getSalary(2);ce1.getSalary(2);ce2.getSalary(2);實驗結果保FProblems琮；Javadoc%Oeclara4ion用Console箕TestCo-mpany(1JJavaApplicationE:MyEclip&ebinf其Hmm在2,月的#資方：3際.0其ztbg?同為#矍后;5256-0.0戾hcu在2.目利手至臺;78d0.

32、0實驗七packageSSeventh;publicclassappleimplementsFruitpublicvoidapple()/TODOAuto-generatedmethodstubSystem.out.println(創(chuàng)建了一個蘋果類的對象);Overridepublicvoidbanana()/TODOAuto-generatedmethodstubOverridepublicvoidpear()/TODOAuto-generatedmethodstubpackageSSeventh;publicclassbananaimplementsFruitpublicvoidbanan

33、a()/TODOAuto-generatedmethodstubSystem.out.println(BHHW-);Overridepublicvoidapple()/TODOAuto-generatedmethodstubOverridepublicvoidpear()/TODOAuto-generatedmethodstubpackageSSeventh;publicinterfaceFruitvoidapple();voidbanana();voidpear();packageSSeventh;publicclasspearimplementsFruitpublicvoidpear()/

34、TODOAuto-generatedmethodstubSystem.out.println(創(chuàng)建了一個梨子類的對象);Overridepublicvoidapple()/TODOAuto-generatedmethodstubOverridepublicvoidbanana()/TODOAuto-generatedmethodstubpackageSSeventh;importjava.util.Scanner;publicclassTestpublicstaticvoidmain(Stringargs)/TODOAuto-generatedmethodstub/Fruitf=newbana

35、na();Scannerinput=newScanner(System.in);System.out.println(請輸入您要創(chuàng)建的類：”)；Stringattr=input.nextLine();if(attr.equals(banana)Fruitfruit=newbanana();fruit.banana();elseif(attr.equals(apple)Fruitfruit=newapple();fruit.apple();elseif(attr.equals(pear)Fruitfruit=newpear();fruit.pear();)elseSystemut.println

36、(輸入有誤！);)實驗結果麻fProblems邙Javadoc時Determinateds-TestJavaApp濡鞋入宅要七春期莢：banana上建TT叁要走的走壇.評分標準A內容功能完善，編程風格好，人機接口界面好；B內容功能完善，編程風格良好，人機接口界面良好；C完成必做內容；D能完成必做內容；E未按時完成必做內容，或者抄襲（雷同者全部為E）.參照書上實驗按模版要求，將【代碼】替換為Java程序代碼，編寫好完整的程序文檔，最后運行得到的相關文件，把實驗所得文件一起打包上交。（壓縮包的文件名為：學號后三位和名字開頭字母，如109zhh.RAR|ZIP）模板代碼附錄：實驗1中國人與美國人模板

37、代碼People.javapublicclassPeopleprotecteddoubleweight,height;publicvoidspeakHello()System.out.println(yayayaya);publicvoidaverageHeight()height=173;System.out.println(averageheight:+height);publicvoidaverageWeight()weight=70;System.out.println(averageweight:+weight);ChinaPeople.javapublicclassChinaPeo

38、pleextendsPeoplepublicvoidspeakHello()System.out.println(你好)；publicvoidaverageHeight()height=168.78;System.out.println(中國人的平均身高:+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)；AmericanPeople.javapublicclassAmericanPeopleextendsPe

39、ople/【代碼2】重寫publicvoidspeakHello()方法,輸出:Howdoyoudo/【代碼3】/重寫publicvoidaverageHeight()方法,輸出:Americansaverageheight:176cmpublicvoidaverageWeight()weight=75;System.out.println(Americansaverageweight:+weight+kg);publicvoidamericanBoxing()System.out.println(直拳、鉤拳、組合拳)；BeijingPeople.javapublicclassBeijingP

40、eopleextendsChinaPeople/【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)；Example.javapublicclassExamplepublicstaticvoidmain(Stringargs)ChinaPeoplechinaPeople=newChinaPeople();AmericanPeop

41、leamericanPeople=newAmericanPeople();BeijingPeoplebeijingPeople=newBeijingPeople();chinaPeople.speakHello();americanPeople.speakHello();beijingPeople.speakHello();chinaPeople.averageHeight();americanPeople.averageHeight();beijingPeople.averageHeight();chinaPeople.averageWeight();americanPeople.avera

42、geWeight();beijingPeople.averageWeight();chinaPeople.chinaGongfu();americanPeople.americanBoxing();beijingPeople.beijingOpera();beijingPeople.chinaGongfu();實驗2銀行與利息Bank.javapublicclassBankintsavedMoney;intyear;doubleinterest;doubleinterestRate=0.29;publicdoublecomputerInterest()interest=year*interes

43、tRate*savedMoney;returninterest;publicvoidsetInterestRate(doublerate)interestRate=rate;ConstructionBank.javapublicclassConstructionBankextendsBankdoubleyear;publicdoublecomputerInterest()super.year=(int)year;doubler=year-(int)year;intday=(int)(r*1000);doubleyearInterest=/【代碼1】/super調用隱藏的computerInte

44、rest()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;BankOfDalian.javapublicclassBankOfDalianextendsBankdoubleyear;publicdoublecomputerInterest()super.year=(int)year;doubler=year

45、-(int)year;intday=(int)(r*1000);doubleyearInterest=/【代碼2】/super調用隱藏的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;SaveMoney.javapublicclassSaveMoneypublicsta

46、ticvoidmain(Stringargs)intamount=8000;ConstructionBankbank1=newConstructionBank();bank1.savedMoney=amount;bank1.year=8.236;bank1.setInterestRate(0.035);doubleinterest1=puterInterest();BankOfDalianbank2=newBankOfDalian();bank2.savedMoney=amount;bank2.year=8.236;bank2.setInterestRate(0.035);doubleinte

47、rest2=puterInterest();System.out.printf(兩個銀行利息相差元也”,血010512-血010511);實驗3面積之和模板代碼Geometry.javapublicabstractclassGeometrypublicabstractdoublegetArea();TotalArea.javapublicclassTotalAreaGeometrytuxing;doubletotalArea=0;publicvoidsetTuxing(Geometryt)tuxing=t;publicdoublecomputerTatalArea()/【代碼3】用循環(huán)語句讓t

48、uxing的元素調用getArea方法，并將返回的值累加到totalAreareturntotalArea;模板代碼模板代碼Rect.javapublicclassRectextendsGeometrydoublea,b;Rect(doublea,doubleb)this.a=a;this.b=b;/【代碼1】重寫getArea()方法Circle.javapublicclassCircleextendsGeometrydoubler;Circle(doubler)this.r=r;/【代碼2】重寫getArea()方法MainClass.javapublicclassMainClasspub

49、licstaticvoidmain(Stringargs)Geometry口tuxing=newGeometry29;/W29個Geometry對象for(inti=0;ituxing.length;i+)29個Geometry對象分成兩類if(i%2=0)tuxingi=newRect(16+i,68);elseif(i%2=1)tuxingi=newCircle(10+i);TotalAreacomputer=newTotalArea();computer.setTuxing(tuxing);System.out.printf(各種圖形的面積之和：n%f,puterTatalArea();

50、實驗4歌手大賽ComputerAverage.javapublicinterfaceComputerAveragepublicdoubleaverage(doublex);SongGame.javapublicclassSongGameimplementsComputerAveragepublicdoubleaverage(doublex)intcount=x.length;doubleaver=0,temp=0;for(inti=0;icount;i+)for(intj=0;jcount;j+)if(xjxi)temp=xj;xj=xi;xi=temp;for(inti=0;i2)aver=aver/(co