java接口与实现接口的类实验报告

1、课程名称面向对象程序设计实验名称实验六、接口与实现接口的类日期2018/4/29学生学号姓名班级实验目的：通过本次实验，要求学生能进一步掌握接口、java.la ng包中的基础类库和java.util包中的工具类库的使用方法。实验条件：电脑一台、能上网查阅资料。1.定义Person类，包含name （姓名）、birthday （出生日期）、idCard （身份证 号）、sex （性别）、age（年龄）等基本信息，通过使用Comparator<T>接口实验Person类可以按姓名、年龄、出生日期等多种比较规则进行排序。源代码：package person;public class P

2、ers on Stri ngn ame;StringidCard ;String birthday ;char sex ;int age;public Pers on（） public Person（Stringname, StringidCard , Stringbirthday , char sex , int age） super （）;this . name = name;this . idCard = idCard ;this . birthday = birthday ;this . sex = sex ;this . age = age ;package person;impor

3、tpublic class CompareName impleme nts Comparator<Pers on>Overridepublic int compare（Pers onp1 , Pers onp2） / TODO自动生成的方法存根returnpl . pareTo( p2. name);package person;importpublic class CompareBirthdayimpleme ntsComparatorvPers on>Overridepublic int compare(Pers onp1 , Pers onp2) / TODO自动生成的

4、方法存根returnp1 . birthday .compareTo( p2. birthday );package person;importpublic class CompareAgeimpleme ntsComparatorvPers on>SuppressWarnings ("deprecation" )Overridepublic int compare(Pers onpl , Pers onp2) / TODO自动生成的方法存根newlnteger( p2. age);return new Integer( pl . age ).compareTo( p

5、ackage import publicpers on;class Pers on Text public static/ TODOvoid main( Str in g自动生成的方法存根args ) int n=5;Pers onpers on0=newPers on("张三“，"4569","1996年6月6日",'男，22);pers on1=newPers on("李四",“1234","1995年4月3日",'男,23);pers on2=newPers on(&quo

6、t;王五","2589","1997年3月5日",'男,21);pers on3=newPers on("赵丽“，"3698","1998年2月5日",'女',20);pers on4=newPers on("宋月“，"5869","1998年1月 1日",'女',20);System.out.pri ntl n(“原来顺序为:");for (inti =0; i <n; i +) Syst

7、em.out.pr in tl n("姓名:"+pers +"性别:"+pers onpers on =new Pers onn;age+" 生日："+person i . birthdayi .);i . sex +"年龄:"+pers onSystem.Arrays. for (intout .println( "n按姓名排序后顺序为sort ( person , new CompareName();i =0; i <n; i +) :");System. out .p

8、rintln("姓名:"+person i . name+" 性别:"+person i . sex +" 年龄:"+person i . age+"生日:"+person i . birthday );System. out .println( "n按年龄排序后顺序为:");Arrays. sort ( person , new CompareAge();for (int i =0; i <n; i +) System. out .println("姓名："+pers

9、on i . name+" 性别："+person i . sex +" 年龄:"+person i . age+"生日:"+person i . birthday );System. out .println( "n按生日排序后顺序为 :");Arrays. sort ( person , new CompareBirthday();for (int i =0; i <n; i +) System. out .println("姓名:"+person i . name+" 性别

10、:"+person i . sex +" 年龄:"+person i . age+"生日:"+person i . birthday );实验结果：2.首先定义基本几何图形接口( IShape ),然后定义IShape的实现类Circle(圆 形)、Square (正方形)和Triangle(三角形)。要求计算各种图形的面积和周长。(提示：求三角形的面积用海伦公式：S L* (L a)*(L b)*(L c)，其中a,b,c是三角形的边长，L=(a+b+c)/2 ，即周长的一半。) 源代码:package jiekoushape;public

11、in terface IShape public doublepublic doublepackage jiekoushape;public class Circlearea(); len gth();impleme ntsIShapeprivate privateStr ing doublen ame;publicCircle(Str ingsuper ();this . name = name;n ame,double r) this . r = r ;n ame) public Stri ng getName() return n ame;public void setName(Stri

12、 ng this . name = name;public double getR() return r;public void setR( double r) this . r = r ;Overridepublic double area() / TODO自动生成的方法存根return Math. PI *Math. pow( r , 2);Overridepublic double len gth() / TODO自动生成的方法存根return Math. PI *r *2;Overridepublic String toString() / TODO自动生成的方法存根"+ar

13、ea();returnname+"周长是："+length()+"," +"面积是:package jiekoushape;public class Squareimpleme ntsIShape privateStri ngn ame;private double a;publicSquare(Str ingn ame, double a) super ();this . name = name;this . a = a;public Stri ng getName() returnn ame;public void setName(Stri

14、 ng n ame) this . name = name;public double getA() return a;public void setA( double a) this . a = a;Overridepublic double area() / TODO自动生成的方法存根return a* a;Overridepublic double len gth() / TODO自动生成的方法存根return 4* a;OverridepublicString toString() / TODO自动生成的方法存根returnname+"周长是："+length()+

15、 "," +"面积是："+area();package jiekoushape;public class Trian gleimpleme ntsIShapeprivateStr ingn ame;privatedoublea;privatedoubleb;privatedoublec;publicTria ngle(Stri ngn ame,double a, double b, double c) super ();this . name = name;this . a = a;this . b = b;this . c = c;public Str

16、i ng getName() returnn ame;public void setName(Stri ngn ame) this . name = name;public double getA() return a;public void setA( double a) this . a = a;public double getB() return b;public void setB( double b) this . b = b;public double getC() return c;public void setC( double c) this . c = c;public

17、double area() / TODOAuto-ge nerated method stubdouble l =( a+b+c)/2;return Math. sqrt ( l *( l - a)*( l - b)*( l - c);public double len gth() / TODOAuto-ge nerated method stub retur na+b+c;OverridepublicStri ng toStri ng() / TODO自动生成的方法存根returnname+"周长是："+length()+ "," +"面积是："+area(); package jiekoushape;public class DemoIShape public static void main( Str in gargs ) / TODO自动生成的方法存根IShape shape =n ull shape =new Circle( System. out .println( shape =new Square( System. out .println( shape =new Trian gle( Sys