java接口与实现接口的类实验报告

实验报告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.lang 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;publicclassPerson{Stringname;StringidCard;Stringbirthday;charsex;intage;publicPerson(){}publicPerson(Stringname,StringidCard,Stringbirthday,charsex,intage){super();=name;this.idCard=idCard;this.birthday=birthday;this.sex=sex;this.age=age;}精选文库}package person;import java.util.Comparator;public class CompareName implements Comparator<Person>{@Overridepublic int compare(Person p1,Person p2){TODO自动生成的方法存根return p1.pareTo( );}}package person;import java.util.Comparator;public class CompareBirthday implements Comparator<Person>{@Overridepublic int compare(Person p1,Person p2){TODO自动生成的方法存根return p1.birthday .compareTo( p2.birthday );}}package person;import java.util.Comparator;public class CompareAge implements Comparator<Person>{@SuppressWarnings ("deprecation" )@Overridepublic int compare(Person p1,Person p2){TODO自动生成的方法存根return newInteger( p1.age).compareTo( newInteger( p2.age));— 2精选文库}}package person;import java.util.Arrays;public class PersonText{public static void main(String[] args){TODO自动生成的方法存根intn=5;Person[]person=newPerson[n];person[0]=newPerson("张三","4569","1996年6月6日",'男',22);person[1]=newPerson("李四","1234","1995年4月3日",'男',23);person[2]=newPerson("王五","2589","1997年3月5日",'男',21);person[3]=newPerson("赵丽","3698","1998年2月5日",'女',20);person[4]=newPerson("宋月","5869","1998年1月1日",'女',20);System.out.println("原来顺序为:");for(inti=0;i<n;i++){System.out.println("姓名:"+person[i].name+"性别:"+person[i].sex+"年龄:"+person[i].age+"生日:"+person[i].birthday);}System.out.println("\n按姓名排序后顺序为:");Arrays.sort(person,newCompareName());for(inti=0;i<n;i++){System.out.println("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,newCompareAge());for(inti=0;i<n;i++){System.out.println("姓名:"+person[i].name+"性别:"+person[i].sex+"年龄:"+person[i].age+"生日:"+person[i].birthday);}System.out.println("\n按生日排序后顺序为:");Arrays.sort(person,newCompareBirthday());for(inti=0;i<n;i++){System.out.println("姓名:"+person[i].name+"性别:"+person[i].sex+"年龄:"+person[i].age+"生日:"+person[i].birthday);— 3精选文库}}}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：SL*(La)*(Lb)*(Lc)，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;— 4精选文库public interface IShape{public double area();public double length();}package jiekoushape;public class Circle implements IShape{private String name;private double r;public Circle(String name, double r){super();this .name= name;this .r= r;}public StringgetName(){return name;}public void setName(String name){this .name= name;}public double getR(){return r;}public void setR( double r){this .r= r;}— 5精选文库@Overridepublic double area(){TODO自动生成的方法存根return Math. PI*Math. pow(r,2);}@Overridepublic double length(){TODO自动生成的方法存根return Math. PI*r*2;}@Overridepublic StringtoString(){TODO自动生成的方法存根return name+"周长是："+length()+ "," +"面积是："+area();}}package jiekoushape;public class Square implements IShape{private String name;private double a;public Square(String name, double a){super();this .name= name;this .a= a;}— 6精选文库public StringgetName(){return name;}public void setName(String name){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 length(){TODO自动生成的方法存根return 4*a;}@Override— 7精选文库public StringtoString(){TODO自动生成的方法存根return name+"周长是："+length()+ "," +"面积是："+area();}}package jiekoushape;public class Triangle implements IShape{private String name;private double a;private double b;private double c;publicTriangle(Stringname,doublea,doubleb,doublec){super();=name;this.a=a;this.b=b;this.c=c;}public StringgetName(){return name;}public void setName(String name){this .name= name;}public double getA(){return a;}— 8精选文库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 double area(){TODOAuto-generatedmethodstubdouble l=(a+b+c)/2;return Math. sqrt (l*(l-a)*( l-b)*( l-c));}public double length(){TODOAuto-generatedmethodstubreturn a+b+c;}— 9精选文库@Overridepublic StringtoString(){TODO自动生成的方法存根return name+"周长是："+length()+ "," +"面积是："+area();}}package jiekoushape;public class DemoIShape{public static void main(String[] args){TODO自动生成的方法存根IShapeshape=null;shape=newCircle("圆形",3);System.out.println(shape.toString());shape=newSquare("正方形",4);Syste