...wd......wd......wd...信息工程學院實驗報告的內容與格式按任課教師的要求書寫。實驗報告的內容與格式按任課教師的要求書寫。Java程序設計實習報告學院:信息工程學院班級:姓名:學號:成績:1．實驗目的掌握Java程序面向對象編程的根本架構，會運用面向對象的思想編寫Java程序。2.實驗過程熟悉JAVA的編程環境實驗題1閱讀如下程序，完成思考題。classCCircle{doublepi;doubleradius;doublegetRadius()//返回圓半徑{returnradius;}voidsetCircle(doubler,doublep)//設置圓半徑{pi=p;radius=r;}}publicclassEx2_1{publicstaticvoidmain(Stringargs[]){CCirclecir1=newCCircle();//創立一個新圓類cir1.setCircle(2.0,3.1416);//設置圓半徑System.out.println("radius="+cir1.getRadius());//輸出圓半徑}}程序運行結果如下：實驗題2設計一個用來描述汽車的類，使用類的非靜態成員變量來表示汽車的車主姓名、當前的速率和當前方向盤的轉向角度，使用類的非靜態成員方法來表示改變汽車的速率和停車兩個操作。程序源代碼如下：publicclasscar{ Stringname;doublespeed;doubleangle;voidcar() {="user";this.speed=0;this.angle=0; }publicStringgetname() {returnname; }publicvoidsetuser(Stringname) {=name; }publicvoidsetSeppd(doublespeed) {this.speed=speed; }publicdoublegetspeed() {returnspeed; }publicvoidsetangle(doubleangle) {this.speed=angle; }publicdoublegetangle() {returnangle; }publicvoidstopcar() {this.setangle(0);this.setSeppd(0); }/** *@paramargs */publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub carA=newcar(); A.setuser("zhangyong"); A.setSeppd(150); A.setangle(35); System.out.println("beforestopcar:"); System.out.println("thiscarsbelongto:"+A.getname()); System.out.println("nowthespeedis:"+A.getspeed()); System.out.println("nowthecarangleis"+A.getangle()); A.stopcar(); System.out.println("stopcar"); System.out.println("thiscarsbelongto:"+A.getname()); System.out.println("nowthespeedis:"+A.getspeed()); System.out.println("nowthecarangleis"+A.getangle()); }}運行結果：實驗題3定義一個類MyProgram，包含兩個屬性：一個是private的整型屬性data、一個是private的String類型的屬性str，封裝這兩個屬性的四個方法setData〔〕和getData〔〕、setStr()和getStr〔〕；將這兩個屬性轉變為字符串的方法是toStr〔〕。編寫程序，使用MyProgram類，實現數據的訪問和修改，并調用toStr〔〕方法顯示該類的屬性。程序源代碼如下：publicclassMyprogrem{privateintdata;privateStringStr;publicvoidSetData(intdata){ this.data=data;}publicvoidSetStr(StringStr){ this.Str=Str;}publicintgetdata(){ returnthis.data;}publicStringgetStr(){ returnthis.Str;}publicStringtoString(intd){ returnString.valueOf(d);}publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstub MyprogremM=newMyprogrem(); System.out.println("beforechangethevalues:"); M.SetData(15); M.SetStr("zhangyong"); System.out.println(M.data); System.out.println(M.Str); System.out.println("changethevalues:"); M.SetData(20); M.SetStr("asdf"); System.out.println(M.data); System.out.println(M.Str); }}實驗題4定義一個類實現銀行帳戶的概念，包括的變量有"帳號"和"存款余額"，包括的方法有"存款"、"取款"、"查詢余額"和〞顯示帳號〞。定義主類，創立帳戶類的對象，并完成相應操作。提示：關鍵代碼如下：publicintgetleftmoney(){returnleftmoney;}publicvoidsavemoney(doublemoney){leftmoney+=money;}publicvoidgetmoney(doublemoney){if(money<=leftmoney)leftmoney-=money;elseSystem.out.println("只能?。?+leftmoney);}…bankaccountba=newbankaccount(888123,1000);ba.savemoney(21000);System.out.println("存入21000元后余額為："+ba.getleftmoney());ba.getmoney(11500);System.out.println("11500元后余額為："+ba.getleftmoney());源代碼如下：publicclassbankaccount{ Stringbanknumber; doubleaccountbalance; voidbankaccoutn(Stringb) { banknumber=b; accountbalance=5000; } publicStringgetaccountnumber() { returnthis.banknumber; } publicdoublegetaccountbalance() { returnthis.accountbalance; } publicdoublegetleftmoney() { returnaccountbalance; } publicvoidsavemoney(doublemoney) { accountbalance+=money; } publicvoidgetmoney(doublemoney) { if(money<=accountbalance) accountbalance-=money; else System.out.println("只能取："+accountbalance); } publicbankaccount(){ //TODOAuto-generatedconstructorstub } /** *@paramargs */ publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstubbankaccountB=newbankaccount();B.bankaccoutn("799524545253321346501");System.out.println("當前賬號為："+B.getaccountnumber());System.out.println("當前賬號余額為："+B.getaccountbalance());B.savemoney(21000);System.out.println("存入21000元后余額為："+B.getleftmoney());B.getmoney(11500);System.out.println("11500元后余額為："+B.getleftmoney()); }}運行結果如下：實驗題5定義鏈表類，實現單鏈表根本操作。提示：關鍵代碼如下：publicclassNode{publicintdata;Nodenext;publicNode(intdata){this.data=data;this.next=null;}publicvoidNodeDisplay(){System.out.println("{"+data+"}");}}publicclassLink{·publicLink(){this.first=null;}publicbooleanisEmpty(){}publicvoidinsertHeadNode(intdata){}publicNodedeleteHeadNode(){}publicvoidfindNode(intk){}publicvoiddisplayLink(){}publicstaticvoidmain(String[]args){}}源代碼如下：publicclasslink{ privateNodefirst; publiclink() { //TODOAuto-generatedconstructorstub this.first=null; } publicbooleanisEmpty() { if(this.first==null) { returntrue; } else { returnfalse; } } publicvoidinsertHeadNode(intdata) { NodeN=newNode(0); N.data=data; N.next=this.first.next; this.first.next=N; } publicNodedeleteHeadNode() { if(!isEmpty()) { this.first=this.first.next; returnthis.first.next; } else { System.out.println("thislinkisenpty!"); returnnull; } } publicvoidfindNode(intk) { NodeN=newNode(0); N=first.next; inti=0; while(N!=null) { if(N.data==k) { System.out.println(k+"在節點中的位置為："+(i+1)); break; } N=N.next; ++i; } if(N==null) { System.out.println("無此數！"); } } publicvoiddisplayLink() { if(this.first.next!=null) { Nodepro=newNode(0); pro=first.next; while(pro!=null) { pro.NodeDisplay(); pro=pro.next; } } else { System.out.println("linkisempty！"); } } publicstaticvoidmain(String[]args) { linklink=newlink(); link.first=newNode(0); System.out.println("沒有插入數據:"); link.displayLink(); System.out.println("插入數據后:"); link.insertHeadNode(1); link.insertHeadNode(2); link.insertHeadNode(3); link.insertHeadNode(4); link.insertHeadNode(5); link.displayLink(); System.out.println("刪除頭結點:"); link.deleteHeadNode(); link.displayLink(); System.out.println("查找數據3:"); link.findNode(3); System.out.println("查找數據1:"); link.findNode(1); }}運行結果如下：實驗三面向對象編程〔2〕1．實驗目的〔1〕掌握Java中的繼承機制及包〔package〕、接口〔interface〕等的設計方法?！?〕掌握static、this、super等關鍵字的使用。2．實驗內容實驗題1有圖形類的父類Shape，參照圓Circle類補充完整正方性Square和三角形Triangle類，并分析運行結果。classShape{voiddraw(){}voiderase(){}}classCircleextendsShape{voiddraw(){System.out.println("Circle.draw()");}voiderase(){System.out.println("Circle.erase()");}}classSquareextendsShape{voiddraw(){}voiderase(){}}classTriangleextendsShape{voiddraw(){}voiderase(){}}publicclassShapes{publicstaticShaperandShape(){switch((int)(Math.random()*3)){default://Toquietthecompilercase0:returnnewCircle();case1:returnnewSquare();case2:returnnewTriangle();}}publicstaticvoidmain(String[]args){Shape[]s=newShape[9];//Fillupthearraywithshapes:for(inti=0;i<s.length;i++)s[i]=randShape();//Makepolymorphicmethodcalls:for(inti=0;i<s.length;i++)s[i].draw();}}程序源代碼如下：Shape類：publicclassshape{voiddraw(){ }voiderase(){ }publicshape(){//TODOAuto-generatedconstructorstub }/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub }}Square類：publicclasssquareextendsshape{voiddraw() { System.out.println("square.draw()"); }voiderase(){ System.out.println("suqre.erase()"); }publicsquare(){//TODOAuto-generatedconstructorstub }/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub }}Triangle類：publicclassTriangleextendsshape{voiddraw() { System.out.println("Triangle.draw()"); }voiderase() { System.out.println("Triangle.erase()"); }publicTriangle(){//TODOAuto-generatedconstructorstub }/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub }}Circle類：publicclasscircleextendsshape{voiddraw(){ System.out.println("Circle.draw()"); }voiderase(){ System.out.println("Circle.erase()"); }publiccircle(){//TODOAuto-generatedconstructorstub }/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub }}Shapes類：publicclassshapes{publicstaticshaperandShape() {switch((int)(Math.random()*3)) {default://Toquietthecompilercase0:returnnewcircle();case1:returnnewsquare();case2:returnnewTriangle(); } }publicstaticvoidmain(String[]args) { shape[]s=newshape[9];for(inti=0;i<s.length;i++)//Fillupthearraywithshapes { s[i]=randShape(); }for(inti=0;i<s.length;i++) { s[i].draw(); } }}程序運行結果如下：實驗題2有兩個類：MobileManagement和Mobile，分別描述如圖3.7所示兩部手機名稱及價格，類MobileManagement在包.nwsuaf.jp.p3中，而Mobile在包.nwsuaf.jp.p3.data中。它們代碼如下。運行MobileManagement.java，你應該看到如圖3.8所示結果。[根本要求]在空白處填寫相關代碼并修改上面程序，使程序能夠顯示兩部手機的價格和數量，運行結果如圖3.9所示。E365,1780RMBM330,1450RMB圖3.4手機及價格圖圖3.5運行結果圖程序源代碼如下：.nwsuaf.jp.p3下的MobileManagement類：package.nwsuaf.jp.p3;importjavax.swing.JOptionPane;publicclassMobileManagement{/**Definestheentrypointoftheapplication.*/publicstaticvoidmain(String[]args){ Mobilemobile1=newMobile("E365",1780); Mobilemobile2=newMobile("M330",1450); JOptionPane.showMessageDialog(null,"Mobilephones:\n\n"+mobile1.getName()+"\n"+mobile2.getName()); }}.nwsuaf.jp.p3.data下的Mobile類：package.nwsuaf.jp.p3.data;publicclassMobile{/**Holdsthenameofthemobile.*/privateStringname;/**Holdsthepriceofthemobile.*/privatefloatprice;/**Createsanewmobileobject.*/publicMobile(Stringname,floatprice){=name;this.price=price; }/**Getsthenameofthemobile.*/publicStringgetName(){returnname; }/**Getsthepriceofthemobile.*/publicfloatgetPrice(){returnprice; }}運行結果如下：實驗題3有四個類，主類Store在包.nwsuaf.jp.p4中，Mobile、Mp3Player、Product在包.nwsuaf.jp.p4.data中，Mobile、Mp3Player是Product的子類.[根本要求]設計類Mobile和類MP3Player，使它們和類Product、Store組成一個完整的程序，且運行結果如圖3.10所示。程序源碼如下：.nwsuaf.jp.p4.data中Product類：package.nwsuaf.jp.p4.data;publicabstractclassProuductimplementsComparable<Prouduct>{/**Holdsthenameoftheproduct.*/protectedStringname;/**Holdsthepriceoftheproduct.*/protectedfloatprice;/**Holdsthenumberofproducts.*/protectedstaticintcount;/**Createanewproductobject.*/protectedProuduct(){ }/**Getsthenameoftheproduct.*/publicStringgetName(){returnname; }/**Getsthepriceoftheproduct.*/publicfloatgetPrice(){returnprice; }/**Getsthenumberofproducts.*/publicstaticintgetCount(){returncount; }/**Comparesthisproductwiththegivenproduct.*/publicintcompareTo(Prouductproduct) {returnnewFloat(product.getPrice())pareTo(price); }}.nwsuaf.jp.p4.data中Mp3Player類：package.nwsuaf.jp.p4.data;publicclassMP3playerextendsProuduct{privateStringname;privatefloatprice;privateintmemory;publicMP3player(Stringname,intmemory,floatprice) {//TODOAuto-generatedconstructor=name;this.price=price;this.memory=memory; ++count; }publicStringgetMP3playername() {; }publicfloatgetMP3playerprice() {returnthis.price; }publicintgetmemory() {returnthis.memory; }publicStringtoString() {+"("+this.memory+"MB),"+this.price+"RMB"; }}.nwsuaf.jp.p4.data中Mobile類：package.nwsuaf.jp.p4.data;publicclassMobileextendsProuduct{privateStringname;privatefloatprice;privateStringWTO;publicMobile(StringWTO,Stringname,floatprice){//TODOAuto-generatedconstructor=name;this.price=price;this.WTO=WTO; ++count; }publicStringgetName() {; }publicfloatgetprice() {returnthis.price; }publicStringgetWTO() {returnthis.WTO; }publicStringtoString() {+"on"+this.WTO+","+this.price+"RMB"; }}.nwsuaf.jp.p4中的主類Store：package.nwsuaf.jp.p4;import.nwsuaf.jp.p4.data.*;publicclassStoreextendsProuduct{publicStringtoString() {+""+this.price+""; }//**Definestheentrypointoftheapplication.*/publicstaticvoidmain(String[]args){//Createstwomobilephoneobjects. Mobilemobile1=newMobile("ChinaMobile","E365",1780); Mobilemobile2=newMobile("ChinaMobile","M330",1450); MP3playerplayer1=newMP3player("MeizoX3",256,399); MP3playerplayer2=newMP3player("MeizoE5",512,580); MP3playerplayer3=newMP3player("XliveXMMP3Play",256,930); Prouduct[]prouducts={mobile1,mobile2,player1,player2,player3}; Arrays.sort(prouducts); Stringtext="";for(intindex=0;index<prouducts.length;++index) { text+=prouducts[index].toString()+"\n"; }//Displaysthetwomobilephonesinadialogbox. JOptionPane.showMessageDialog(null,"Theproductsare:\n\n"+text+"\nThereare"+Prouduct.getCount()+"products."); }}程序運行結果如下：實驗題4用LIST存放對象。利用面向對象的思想，創立以下類：Person類，包含Person的姓名和身份證號碼。Student類，首先是一個Person，除此之外，包含學生的語文、數學、英文課的成績。Teacher類，首先是一個Person，除此之外，包含教師的工資。①請創立姓名張三身份證號12310000的Person對象。②請創立姓名李四身份證號12320000語文：89數學：93英文：94的Student對象。③請創立姓名王五身份證號12330000工資：3000的Teacher對象。④將這些對象存放在List中，并打印出List中存放的內容。程序源代碼如下：Person類：publicclassPersonimplementsComparable<Person>{ Stringname; StringID; publicPerson(){ //TODOAuto-generatedconstructorstub } publicvoidsetperson(Stringname,StringID) { =name; this.ID=ID; } publicStringgetname() { return; } publicStringgetID() { returnthis.ID; } publicStringtoString() { return"姓名："++""+"身份證號："+this.ID; } publicinthashcode() { return.hashCode()+this.ID.hashCode(); } publicbooleanequals(Objecto) { if(this==null) { returnfalse; } elseif(!(oinstanceofPerson)) { returnfalse; } else { Personp=(Person)o; if(this.getID()pareTo(p.getID())>0) { returntrue; } elseif(this.getID()pareTo(p.getID())==0&&this.getID()pareTo(p.getID())<0) { returnfalse; } } returnfalse; } /** *@paramargs */ publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstub } @Override publicintcompareTo(Persono){ //TODOAuto-generatedmethodstub inta=Integer.parseInt(this.getID()); intb=Integer.parseInt(o.getID()); if(a>b) { return1; } elseif(a==b) { return0; } else { return-1; } }}Student類：publicclassStudentextendsPerson{doublechinese;doublemath;doubleenglish;publicStudent(Stringname,StringID,doublechinses,doublemath,doubleenglish){//TODOAuto-generatedconstructor=name;this.ID=ID;this.chinese=chinses;this.math=math;this.english=english; }publicdoublegetchinses() {returnthis.chinese; }publicdoublegetmath() {returnthis.math; }publicdoublegetenglish() {returnthis.english; }publicStringtoString() {return"姓名："++""+"身份證號："+this.ID+"語文成績："+this.chinese+"英語成績："+this.english+"數學成績："+this.math; }}Teacher類：publicclassTeacherextendsPerson{doublesalar;publicTeacher(Stringname,StringID,doublesalar){//TODOAuto-generatedconstructor=name;this.ID=ID;this.salar=salar; }publicdoublegetsalar() {returnthis.salar; }publicStringtoString() {return"姓名："++""+"省份證號："+this.ID+""+"工資："+this.salar; }}List類：importjava.util.ArrayList;publicclassList{publicList(){//TODOAuto-generatedconstructorstub }/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub ArrayList<Person>PersonList=newArrayList<Person>(); Personper=newPerson(); per.setperson("張三","12310000"); StudentStu=newStudent("李四","1232000",78,89,89); Teachertea=newTeacher("王五","125434950",6765); PersonList.add(per); PersonList.add(Stu); PersonList.add(tea);for(inti=0;i<PersonList.size();++i) { System.out.println(PersonList.get(i).toString()); } }}運行結果如下：實驗題5用SET存放對象。利用面向對象的思想，創立以下類：Person類，包含Person的姓名和身份證號碼。①請創立三個對象，放在HashSet中：姓名張三身份證號12310000姓名李四身份證號12320000姓名王五身份證號12330000②再創立對象：姓名張三身份證號12310000能放入到剛剛創立的HashSet中么③把集合中的元素打印出來。④用TreeSet存放上面三個人，要求按照身份證號排序，打印出來。能夠把上面步驟②中創立的對象放到這個TreeSet中么。[根本要求]使用JavaAPI中的Set相關的技術來完成實驗任務。[技術提示]使用HashSet要覆蓋hashCode()方法，equals()方法打印集合內的元素，要覆蓋toString()方法。使用TreeSet要實現Comparable接口。eq\o\ac(○,2)答：不能存放到Treeset里面了，不允許存在一樣的數值。程序源代碼如下：Person類：publicclassPersonimplementsComparable<Person>{ Stringname; StringID; publicPerson(){ //TODOAuto-generatedconstructorstub } publicvoidsetperson(Stringname,StringID) { =name; this.ID=ID; } publicStringgetname() { return; } publicStringgetID() { returnthis.ID; } publicStringtoString() { return"姓名："++""+"身份證號："+this.ID; } publicinthashcode() { return.hashCode()+this.ID.hashCode(); } publicbooleanequals(Objecto) { if(this==null) { returnfalse; } elseif(!(oinstanceofPerson)) { returnfalse; } else { Personp=(Person)o; if(this.getID()pareTo(p.getID())>0) { returntrue; } elseif(this.getID()pareTo(p.getID())==0&&this.getID()pareTo(p.getID())<0) { returnfalse; } } returnfalse; } /** *@paramargs */ publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstub } @Override publicintcompareTo(Persono){ //TODOAuto-generatedmethodstub inta=Integer.parseInt(this.getID()); intb=Integer.parseInt(o.getID()); if(a>b) { return1; } elseif(a==b) { return0; } else { return-1; } }}Treeset類：importjava.util.TreeSet;publicclassTreesettest{publicTreesettest(){//TODOAuto-generatedconstructorstub }/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub TreeSet<Person>mytree=newTreeSet<Person>(); Personp1=newPerson(); Personp2=newPerson(); Personp3=newPerson(); p2.setperson("李四","1232000"); p1.setperson("張三","1231000"); p3.s