java入门.docx

java11【实验题1】安装JDK步骤如下。1 .打开JDK安装程序，按照提示进行JDK的安装。2 .环境变量的设定1 .右击【我的电脑】，选择属性命令，在高级属性里，切换到高级选项卡，点击环境变量按钮。2 .在系统变量列表框里找到Path,双击Path,在变量已有的值后边填加“；d:jdkbin”,单击确定,进行保存。3 .打开命令提示框，输入java,提示设置成功C:>2rulno>C:>JU«er3Mcnovo>JavUsa9e:Java(-options3cLass(ar99.1<Coexecuteacl<sc>rJ<vaCoptionJjarJarfile.)<U9KBCUiCj4rfil>m¼c>acoptIonaIacIudc:-clienttoselectt>e,client*UMservertoselectthe*server,'UHhotspotiscynon,yforCheclintUH(deprecatedTdefaultUHiclient.YP<½IdSMMaaBaelIIMthofdlrcc<>i*iaa<>dj,IXzJQFtles>-ClaaapatH<elA99pathofdirectoriesMde1>JapFile9>A;9cpa1*atedlistofdirectoriesJARarchives*andZ1archivescoc*rchforcla¥sflies.-D<n<¾nv>-<value>t。yctwrurty*"VMrlM>>ttI：c1*3KltSy1:2Jai1enableuc>oaeoutput-versionpriorpraductversionandexitversion：<vftlue>rqu±mthq¾>cIfisdur%iontoEn实验题2使用eclipse开发简单的小程序-HellowWorlcl步骤如下。1 .新建项目：Text2 .在项目里新建CIaSS类Hellowworld3 .编写代码：publicclassHellowWordpublicstaticvoidmain(Stringargs)System,out.printin(zzHellowworld!/z);4 .调试运行cwwvvvWyard/EJgWy11e¾wycvwHr.CeW“/工，xvBellowworld!【实验题3】从键盘输入小写字母，回显并输出其对应的大写字母。步骤如下。1 .新建class类newZimu2 .编写代码publicclassnewZimupublicstaticvoidmain(Stringargs)try(System.out.print(请输入一个小写字母：)；inta=System,in.read();charb=(char)(a-32);System.OUt.print(“大写字母是：+b);)catch(Exceptione)System,out.print(e);)3.调试运行【实验题4】计算个人所得税。设某人月收入为X元(X由键盘输入)，假设个人所得税征收方法如下：(1)当800<x?1300时，应征税为(-800)*5%;当1300<x?2800时,应征税为(-800)*10%;(2)当2800<x?5800时，应征税为(x-800)*15%;当5800<x?28000时，应征税为(-800)*20%;(3)当2800(KX时，应征税为(-800)*30%步骤如下。1 .新建class类salary2 .编写代码：importjava.util.*;publicclasssalarypublicstaticvoidmain(Stringargs)System.out.Print("请输入您的工资:");doubles=newScanner(System,in).nextDouble();doubletax=0;doublesl=0;inta;if(s<=1300s>800)a=l;)elseif(s>1300&s<=2800)a=2;)elseif(s>2800fts<=5800)a=3;)elseif(s>5800&s<=28000)a=4;)elseif(s>28000)a=5;)elsea=6;)switch(a)(case 1:tax=(s-800)*0.05;sl=s-tax;break;case 2:tax=(s-800)*0.1;sl=s-tax;break;case 3:tax=(s-800)*0.15;sl=s-tax;break;case 4:tax=(s-800)*0.2;sl=s-tax;break;case 5:tax=(s-800)*0.3;sl=s-tax;break;case 6:tax=0;sl=s;break;)System.out.PrintIn(您应缴税："+tax+“元，您税后工资为：+sl);)3.调试运行【实验题5】百鸡，公鸡5元/只，母鸡3元/只，小问题鸡3只/元，问100元买100只鸡，公鸡母鸡小鸡各几何，步骤如下。1 .新建class类chicken2 .编写代码publicclasschickenpublicstaticvoidmain(Stringargs)System.out.printin(,z百鸡，公鸡5元/只,母鸡3元/只,小问题鸡3只/元，问100元买100只鸡，公鸡母鸡小鸡各几何,)；intmoney=100;intsum=100;intx=0,y=0,z=0;for(x=0;x<=100;x+)(money=x*5;SUm=X;for(y=0;y<=100;y+)for(z=0;z<=100;z+)(if(x+y+z-100)&&(x*5+y*3+z3=100)System.OUt.printing公鸡+x+只；母鸡+y+只；小鸡+z+只)；)3.调试运行【实验题6】请输入并运行下面的程序，写出程序的运行结果。publicclassArrayCopypublicstaticvoidmain(Stringargs)inta=1,2,3);intb=a;bl=5;System.out.printin(zzal=zz+al+*,bl="+bl);步骤如下。1 .新建class类ArrayCopy2 .编写代码：publicclassArrayCopypublicstaticvoidmain(Stringargs)inta=1,2,3;intb=a;bl=5;System.out.printin(,al=z,+al+,bl=*+bl);)3.调试运行【实验题7】将0,99分别赋给一个包含100个整型元素的数组，并用二分查找法查找元素32、1和1032步骤如下。1 .新建class类Array2.编写代码：publicclassArraystaticbooleanSearch(intnum,intarray)intfront=0;inttail=array,length-1;while(front<=tail)intmiddle=(front+tail)/2;if(arraymiddle=num)returntrue;elseif(arraymiddle>num)tail=middle-1;elsefront=middle+1;)returnfalse;)publicstaticvoidmain(Stringargs)inta;a=newint100;for(inti=0;i<=99;i+)for(intj=O;j<=i;j+)ai=j;System.out.Println("查找数字32:"+SearCh(32,a);System,out.PrintIn(查找数字1:,z+Search(1,a);System,out.Println(查找数字1032:"+SearCh(IO32,a);)3.运行并调试。*>"*三M>wen*.9C，” *«*. .rw t 9*r BA*>(MV”I-, ”.fW 一M"【实验题8】编写一个音乐类，属性包括音乐名称、音乐类型，其方法实现音乐信息的显示。并编写测试类。步骤如下。1 .新建class类MusicClass2 .编写代码Stringname;Stringclassical;publicvoiddisplayOSystem.OUt.printIn("音乐名称：”+name);System.out.Println("音乐类型"+classical)；)3 .新建CIaSS类MUSiCCIaSSTest4 .编写代码publicclassMusicClass_Testpublicstaticvoidmain(Stringargs)MusicClassmusic=newMusicClassO；music,name=如果还有明天；music.classical=zzRockz,;music,display();MusicClassmusic2=newMusicClass();music2.name=离歌；music2.Classical=yzRockyz;music2.displayO;)【实验题9】编写一个手机类，属性包括手机品牌、手机型号，其方法实现手机信息的显示。并编写测试类。步骤如下。5 .新建class类PhoneClass6 .编写代码：publicclassPhoneClassStringMark;StringNum;publicvoiddisplay()System,out.PrintIn("手机品牌:"+Mark);System.out.Println("手机型号："+Num);)7 .新建class类PhoneClass_Test8 .编写代码publicstaticvoidmain(Stringargs)PhoneClassphone=newPhoneClassO；Phone.Mark="诺基亚；phone.Num=,zN8z;phone,displayO;PhoneClassphone2=newPhoneClass();phone2.Mark=zzApplezz;phone2.NUm=3GS”;phone2.display();)5.调试运行【实验题10编写一个程序，实现设置上月电表读数、设置本月电表读数、显示上月电表读数、显示本月电表读数、计算本月用电数、显示本月用电数、计算本月用电费用、显示本月用电费用功能。并编写测试类。步骤如下。2.编写代码:importjava.util.*;publicclassAmmeterdoublei_last;doublei_now;doublemoney_last;doublemoney_now;publicvoidSetRecord()System,out.PrintIn(设置本月电表读数：”)；inowzznewScanner(System,in).nextDouble();System.OUt.printIn(设置上月电表读数：);i_last=newScanner(System,in).nextDouble();)publicvoidShowRecord()System,out.Println(本月用电(单位：度)：+inow);System.out.Println("上月用电(单位：度)：+i_last);)publicvoidCalcUsedFee()System.out.PrintIn(电费每度O.56元)；money_last=i_last*0.56;money-now=inow*0.56;System,out.PrintIn(本月电费(单位:元):z,+money_now);System.out.PrintIn("上月电费(单位：元):,+money-last);)3 .新建class类AmmeteJTeSt4 .编写代码publicclassAmmeter_Testpublicstaticvoidmain(Stringargs)Ammeteram-newAmmcterO；am.setRecord();am.showRecord();am.CalcUsedFeeO;【实验题11】通过封装编写Book类。要求:类具有属性书名、书号、主编、出版社、出版时间、页数、价格，其中页数不能少于200页，否则输出错误信息，并强制赋默认值200;为各属性设置赋值和取值方法;具有方法detai1(),用来在控制台输出每本书的信息。编写BOOkTeSI测试类。为BOOk对象的属性赋予初始值，然后调用BOOk对象的detail方法，看看输出是否正确。2、给BOok类增加构造方法，同时对测试类也做相应的修改。步骤如下。1 .新建class类Book2 .编写代码publicclassBookStringName;StringID;StringAuthor;StringBookPublic;StringTime;intPage;doublePrice;publicvoiddetail()if(Page<200)System,out.Println(输入页码错误，强制转换为200页")；Page=200;Output();elseOutput();)publicvoidOutput()System,out.PrintlI(“书名是："+NamC);System.out.printin(书号是："+ID);System.out.PrintIri(作者是：+AUthor);System,out.Println(出版社是：“+BookPublic);System.OUt.printin("出版时间是Tilne);System,out.PrintIn("页数是:"+Page);)3 .新建class类BookTest4 .编写代码importjava.util.Scanner;publicclassBookTest(publicstaticvoidmain(Stringargs)Bookbk=newBook();System.out.Println(”请输入书名：);bk.Name=newScanner(System,in).next();System.out.Printl.n("请输入书号:);bk.ID=newScanner(System,in).next();System,out.printin(请输入作者:);bk.Author=newScanner(System,in).next();System.out.PrintIn("请输入出版社：“);bk.BookPublic=newScanner(System,in).next();System.out.PrintIn(请输入出版日期：");bk.Time=newScanner(System,in).next();System.out.PrintIn("请输入页数：);bk.Page=newScanner(System,in).nextlnt();bk.detailO;)5.调试运行【实验题12实现一个名为Person的类和它的两个子类Student和Employee0Employee有子类FaCUIty和StaffoPerSon中的人有姓名、地址和电话号码。StUdent中的学生有班级状态（一、二、三、四年级）。将这些状态定义为常量。EmPIOyee中的雇员有办公室、工资。FaCUlty中的教员有级别。Staff中的职员有职务称号。覆盖每个类中的t。String方法，显示类名和人名。步骤如下。ass类Person1.新建cl2.编写代码publicclassPersonprivateStringName;privateStringTel;privateStringAdd;publicPerson(StringName,Stringsuper();this.Name=Name;this.Tel=Tel;this.Add=Add;publicStringgetNameOreturnName;publicStringgetTel()returnTel;)publicStringgetAdd()returnTel;)publicStringtoString()return"姓名："÷Name+:地址：+String Add) Add + ”,电话:Tel+”,CIaSs:PerSon)classStudentextendsPersonprivateintstudent_Grade;publicStudent(StringName,StringTel,StringAdd,intstudent_Grade)super(Name,Tel,Add);this.student_Grade=student_Grade;)publicintgetStudent_Grade()returnstudent_Grade;)publicStringtoString()returnsuper.toString()+，年级：+student_Grade+，class:Student”;)classEmployeeextendsPerson(privateStringOffice;privatedoubleSalary;publicEmployee(StringName,StringTel,StringAdd,StringOffice,doubleSalary)super(Name,Tel,Add);this.Office=Office;this.Salary=Salary;publicStringgetffice()returnOffice;)publicdoublegetSalary()returnSalary;)publicStringtoString()returnSUPer.toStrin晨)+”,办公室："+Office+”,工资："+Salary+”,class:Employee”;)classFacultyextendsEmployeeprivateStringLevel;publicFaculty(StringName,StringTel,StringAdd,StringOffice,doubleSalary,String1.evel)super(Name,Tel,Add,Office,Salary);this.Level=Level;)publicStringgetLevel()returnLevel;)publicStringtoString()returnsuper.toString()+z,教员级别："+LeVeIclass:FaCUlty”;classStaffextendsEmployeeprivateStringPost;publicStaff(StringName,StringTel,StringAdd,StringOffice,doubleSalary,StringPost)super(Name,Tel,Add,Office,Salary);this.Post=Post;)publicStringgetPostOreturnPost;)publicStringtoString()returnsuper.toString()+z,职务称号：“+Post+”,class:Staff,z;)3 .新建class类PersonTest4 .编写代码publicclassPersonJText(publicstaticvoidmain(Stringargs)Personzhangsan=newPerSon(张三“公安局”)；Person1isi=newStUdent("李四"，"11111111，“城建，1);PersonWangWU=newEnIPIoyee("王五"，"1689756666，城建，”计算机系302，2500.00);Employeezhaoliu=newFaCUIty("赵六"，"10086，城建“，计算机系203z,2700.00,副教授)；Employeeliuqi=newStaff("刘七，T0010”,"城建，"计算机系505",4500.00,副书记)；System,out.printin(zhangsan.toString();System,out.printin(lisi.toString();System.out.printin(wangwu.toString();System,out.printin(zhaoliu.toString();System.out.printin(liuqi.toString();5.调试运行【实验题13】编写动物世界的继承关系代码。动物(AnimaI)包括山羊(Goat)和狼(WoIf),他们吃(eat)的行为不同，山羊吃草，狼吃肉，但走路(WaIk)的行为是一致的。通过继承实现以上需求，并编写AnimalTest测试类进行测试。步骤如下：1 .新建class类AnimalTest2.编写代码classAnimalprivateStringname;privateStringWaIk=走；Animal(Stringname,Stringwalk)this,name-name;this,walk=walk;)publicStringgetName()returnname;)publicStringtoString()returnname+”前进方式：“+walk;)classGoatextendsAnimalprivateStringeat;Goat(Stringname,Stringeat,Stringwalk)super(name,walk);this.eat=eat;)publicStringtoString()returnsuper.toString()+z,吃”+eat;)classWolfextendsAnimalprivateStringeat;Wolf(Stringname,Stringeat,Stringwalk)super(name,walk);this,eat=eat;)publicStringtoString()returnsuper.toString()+z,吃+eat;)publicclassAnimalTestpublicstaticvoidmain(Stringargs)Animalg=newGoat(“羊,"草”,走)；Animalw=newWolf(狼，"肉，"走");System.out.println(g.toString();System,out.printin(w.toString();)3.调试运行【实验题14设计几何图形(ShaPe)、矩形(ReCtangle)、圆形(CirCIe)、正方形(SqUare),能够利用抽象类和多态性计算几何图形的面积和周长，并显示出来。步骤如下。1.新建CIaSS类ArCa2.编写代码importjava.lang.Math;abstractclassShape(protecteddoubleArea;protecteddoubleCir;abstractpublicdoublegetArea();abstractpublicdoublegetCir();)classCircleextendsShapedoubler;Circle(doubler)this,r=r;publicdoublegetArea()doublepi=Math.PI;returnr*r*pi;)publicdoublegetCirOdoublepi=Math.PT;return2*pi*r;)classRectangleextendsShape(doublea,b;Rectangle(doublea,doubleb)this,a=a;this,b=b;)publicdoublegetArea()returna*b;)publicdoublegetCirOreturn2*(a+b);)classSquareextendsRectangleSquare(doublea,doubleb)super(a,b);this,a=a;this,b=b;a=b;)publicdoublegetArea()returnMath,pow(a,2);)publicdoublegetCir()return4*a;)publicclassAreapublicstaticvoidmain(Stringargs)Circlec-newCircle(5.1);Rectanglere=newRectangle(5,5.2);Squares-newSquare(5,5);System.out.Println(圆形的面积是："+c.getArea()+zz>周长是：+c.getCir();System.OUt.printin(长方形的面积是："+re.getArea()÷,周长是：+rc.getCirO);System.out.Println(正方形的面积是："+s.getArea()+,周长是："+s.getCir();)3.调试运行【实验题15】编写一个复数类Complexo该类有属性realpart和imaginpart分别表示实部和虚部。该类还有修改设置(Set)和读取(get)属性realpart和imaginpart的方法。编写一个抽象类ConIPUte。该类有属性a和b,它们的数据类型为COnIPlex,代表参加运算的2个复数。该类还提供有一个子类进行计算的抽象方法abstractvoidsolve()o编写一个ComPleXAdd类，它继承自抽象类COmPUteo该类有继承自父类的属性ConIPIeXa,b及方法VOidSOlVe()计算两个复数相加并输出结果。编写一个COmPIeXSUb类，它继承自抽象类ComPUteo该类有继承自父类的属性Complexa,b及方法VoidSolVe()计算两个复数相减并输出结果。编写一个测试类TestComplex,其包含main()方法。在中定义两个复数，实现两个复数的加减运算。步骤如下：1 .新建class类Complex_Calculate2 .编写代码classComplexdoublerealpart;实部doubleimaginpart;虚部publicvoidSetComplex(doubler,doublei)this.realpart=Math.round(r);this,imaginpart=Math.round(i);)publicStringgetComplex()returnrealpart+,z+yz+imaginpart÷yziz,;)abstractclassComputerprotectedComplexa,b;abstractvoidsolve();classComplexAddextendsComputerComplexsm=newComplexO；ComplexAdd(Complexa,Complexb)this,a=a;this,b=b;)voidsolveOsum.realpart=a.realpart+b.realpart;sum.imaginpart=a.imaginpart+b.imaginpart;System,out.printin(a.getComplex()+"+b.getComplex()+z,=zz+sum.getComplex();；)classComplexSubextendsComputerComplexsum=newComplexO;CoinplexSub(Complexa,Complexb)this,a=a;this,b=b;voidsolve()sum.realpart=a.realpart-b.realpart;sum.imaginpart=a.imaginpart-b.imaginpart;System.out.println(a.getComplex()+/z-+b.getComplex()+=+SUnLgetComplex();；)publicclassComplex_Calculatepublicstaticvoidmain(Stringargs)try(Complexsp_a=newComplexO；sp_a.SetComplex(2.O,3.2);Complexsp_b=newComplexO；sb.SetComplex(1.1,2.3);ComplexAddca=newComplexAdd(sp_a,spb);ComplexSubcs=newComplexSub(sp_a,sp_b);ca.solveO;cs.solve();catch(Exceptione)System,out.print(e.toString();【实验题16】在ECliPSe中创建JAVA项目，项目名为“实验八”+“学号”+“姓名”,如姓名“张三”，学号“061408199”，则项目名为“实验八061408199张三”。在该项目下创建2个包，包名分别为“1x1”、“1x2”,分别用于存放以下2个题目的相关程序。步骤如下。1 .新建project项目：实验八081211226亢凯航2 .在项目里新建包Ixl和1x2会实验081211226亢机航ElffiIxlj)Areajava三田1x2i±-团TreaJestjava国0JRE系婉库Qre6【实验题17】设计几何图形(ShaPc)、矩形(ReCtangle)、圆形(CirCle)、正方形(SqUare),能够利用接口和多态性计算几何图形的面积和周长，并显示出来。步骤如下：1 .在Ixl下新建class类SArea2 .编写代码importjava.lang.Math;interfaceShapedoublegetArea();doublegetCirO;)classCircleimplementsShape(doubler;Circle(doubler)this,r=r;)publicdoublegetAreaOdoublepi=Math.PT;returnr*r*pi;)publicdoublegetCir()doublepi=Math.PI;return2*pi*r;)classRectangleimplementsShapedoublea,b;Rectangle(doublea,doubleb)this,a=a;this,b=b;publicdoublegetArea()returna*b;)publicdoublegetCir()return2*(a+b);)classSquareextendsRectangleimplementsShapeSquare(doublea,doubleb)super(a,b);this,a=a;this,b=b;a=b;)publicdoublegetAreaOreturnMath,pow(a,2);)publicdoublegetCir()return4*a;)publicclassArea(publicstaticvoidmain(Stringargs)Circlec=newCircle(5.1);Rectanglere-newRectangle(5,5.2);Squares=newSquare(5,5);System.out.PrintIn(圆形的面积是：+c.getArea()+,周长是："+c.get