实验02-面向对象编程

实验二面向对象编程1．实验目的〔1〕掌握类与对象根本知识；〔2〕Java中的继承机制及包〔package〕、接口〔interface〕等的设计方法；〔3〕掌握static、this、super等关键字的使用；〔4〕掌握Java中两种比拟器的用法。2．实验内容实验题1定义一个类Book，包含两个属性：一个是private的String类型的属性title、一个是private的float类型的属性listPrice，封装这两个属性的四个方法setTitle〔〕和getTitle〔〕、setListPrice()和geListPrice〔〕。根本要求：〔1〕设计类Book及类BookManagement，在类BookManagement中输出Book类的对象的两个private属性；〔2〕重写父类的toString〔〕方法，实现Book类实例的两个属性的输出。package.nwsuaf.jp.p2.data;publicclassBook{privateStringtitle;privatefloatlistPrice;publicstaticintnum;publicBook(Stringt,doublep){this.title=t;this.listPrice=(float)p;num++;}publicStringgetTitle(){returntitle;}publicvoidsetTitle(Stringtitle){this.title=title;}publicfloatgetListPrice(){returnlistPrice;}publicvoidsetListPrice(floatlistPrice){this.listPrice=listPrice;}@OverridepublicStringtoString(){returngetTitle()+"\n￥："+getListPrice();}}package.nwsuaf.jp.p2;importjavax.swing.JOptionPane;import.nwsuaf.jp.p2.data.Book;publicclassBookManagement{ publicstaticvoidmain(String[]args){ Bookbook1=newBook("《闲话中国人》",28.5); Bookbook2=newBook("《吼叫山庄》",20); //System.out.println(book.toString()); JOptionPane.showMessageDialog(null,"Book:\n"+book1 +"\n"+book2+"\n"+"Thereare"+Book.num+"books.");}}实验题2有两个类：MobileManagement和Mobile，Mobile类的的两个实例分别描述如图3.4所示两部名称及价格，类MobileManagement在包中，而Mobile在包中。根本要求：设计Mobile类与MobileManagement类，在类MobileManagement类中实例化Mobile类的对象使程序能够显示两部的价格和数量，运行结果如图3.5。E365,1780RMBM330,1450RMB图3.4及价格图图3.5运行结果package.nwsuaf.jp.p3.data;publicclassMobile{publicstaticintnum;privateStringname;privatefloatprice;publicMobile(Stringname,floatprice){=name;this.price=price;num++;}publicStringgetName(){returnname;}publicfloatgetPrice(){returnprice;}}package.nwsuaf.jp.p3;importjavax.swing.JOptionPane;import.nwsuaf.jp.p3.data.Mobile;publicclassMobileManagement{publicstaticvoidmain(String[]args){Mobilemobile1=newMobile("E365",1780);Mobilemobile2=newMobile("M330",1450);JOptionPane.showMessageDialog(null,"Mobilephones:\n\n"+mobile1.getName()+":"+mobile1.getPrice()+"RMB"+"\n"+mobile2.getName()+":"+mobile2.getPrice()+"RMB"+"\n\n"+"Thereare"+Mobile.num+"mobilephones");}}实验题3有四个类，主类Store在包中，Mobile、Mp3Player、Product在包.data中，Mobile、Mp3Player是Product的子类，Product类为抽象类。根本要求：设计类Mobile和类MP3Player，使它们和类Product、Store组成一个完整的程序，且运行结果如图3.6所示。图3.6运行结果package.nwsuaf.jp.p4.data;publicclassMobileextendsProduct{privateStringMakePlace;publicMobile(Stringtitle,floatPrice,StringmakePlace){super(title,Price);this.MakePlace=makePlace; }publicStringgetMakePlace(){returnMakePlace; }publicvoidsetMakePlace(StringmakePlace){MakePlace=makePlace; }@OverridepublicStringgetName(){//TODOAuto-generatedmethodstubreturntitle+"on"+MakePlace+"Mobile,"+Price+"RMB\n"; }}package.nwsuaf.jp.p4.data;publicclassMp3PlayerextendsProduct{privatelongMemorySize;publicMp3Player(Stringtitle,floatPrice,longmemorySize){super(title,Price);this.MemorySize=memorySize; }publiclonggetMemorySize(){returnMemorySize; }publicvoidsetMemorySize(longmemorySize){MemorySize=memorySize; }publicStringgetName(){returntitle+"("+MemorySize+"MB"+"),"+Price+"RMB"; }}package.nwsuaf.jp.p4.data;publicabstractclassProduct{protectedStringtitle;protectedfloatPrice;protectedstaticintnum;publicProduct(Stringtitle,floatPrice){super();this.title=title;this.Price=Price;num++; }publicStringgetTitle(){returntitle; }publicvoidsetTitle(Stringtitle){this.title=title; }publicfloatgetPrice(){returnPrice; }publicvoidsetPrice(floatprice){Price=price; }publicstaticintgetNum(){returnnum; }publicstaticvoidsetNum(intnum){ Product.num=num; }publicabstractStringgetName();@OverridepublicStringtoString(){returngetName(); }}package.nwsuaf.jp.p4;importjavax.swing.JOptionPane;import.nwsuaf.jp.p4.data.Mobile;import.nwsuaf.jp.p4.data.Mp3Player;import.nwsuaf.jp.p4.data.Product;publicclassStore{publicstaticvoidmain(String[]args){Mobilemobile1=newMobile("E365",1780,"China");Mobilemobile2=newMobile("M330",1450,"China");Mp3Playermp3Player1=newMp3Player("MeizoX3",399,256);Mp3Playermp3Player2=newMp3Player("MeizoE5",580,512);Mp3Playermp3Player3=newMp3Player("XliveXMMP3Player",930,256);JOptionPane.showMessageDialog(null,"Theproductsare:\n\n"+mp3Player1+"\n"+mp3Player2+"\n"+mp3Player3+"\n"+mobile1+mobile2+"\nThereare"+Product.getNum()+"products.");}}实验题4有四个类，主类Store在包中，Mobile、Mp3Player、Product在包.data中，Mobile、Mp3Player是Product的子类，Product类实现Comparable接口，请重写Comparable接口中方法compareTo，实现product对象按照价格排序，运行结果如图3.8所示。图3.7运行结果packagep.p5.data;publicclassMobileextendsProduct{privateStringbus;publicMobile(Stringbuss,Stringname,floatprice){super(name,price);this.bus=buss; }publicStringgetName(){returnname; }publicfloatgetPrice(){returnprice; }publicstaticintgetCount(){returncount; }publicStringtoString(){returnname+"on"+bus+","+String.valueOf(price)+"RMB"; }}package.nwsuaf.jp.p5.data;publicclassMp3PlayerextendsProduct{privateintmomery;publicMp3Player(Stringname,intmm,intprice){super(name,(float)price);this.momery=mm; }publicStringgetName(){returnname; }publicfloatgetPrice(){returnprice; }publicstaticintgetCount(){returncount; }publicStringtoString(){returnname+"("+momery+"MB"+"),"+String.valueOf(price)+"RMB"; }}package.nwsuaf.jp.p5.data;publicabstractclassProductimplementsComparable<Product>{protectedStringname;protectedfloatprice;protectedstaticintcount;protectedProduct(Stringname,floatprice){=name;this.price=price; ++count; }publicStringgetName(){returnname; }publicfloatgetPrice(){returnprice; }publicstaticintgetCount(){returncount; }publicintcompareTo(Productproduct){returnnewFloat(product.getPrice())pareTo(price); }}package.nwsuaf.jp.p5;importjava.util.Arrays;importjavax.swing.JOptionPane;import.nwsuaf.jp.p5.data.Mobile;import.nwsuaf.jp.p5.data.Mp3Player;import.nwsuaf.jp.p5.data.Product;publicclassStore{publicstaticvoidmain(String[]args){Mobilemobile1=newMobile("ChinaMobile","E365",1780);Mobilemobile2=newMobile("ChinaMobile","M330",1450);Mp3Playerplayer1=newMp3Player("M