實(shí)驗(yàn)一：類和對(duì)象

1、實(shí)驗(yàn)一：類和對(duì)象【實(shí)驗(yàn)?zāi)康摹? 理解對(duì)象和類，掌握類的定義及如何創(chuàng)建一個(gè)對(duì)象；2 掌握構(gòu)造方法的運(yùn)用；3 掌握方法的定義和參數(shù)傳遞；4. 掌握類的繼承機(jī)制?！緦?shí)驗(yàn)準(zhǔn)備】一、復(fù)習(xí)配套教材相關(guān)章節(jié)的內(nèi)容；二、預(yù)習(xí)本次實(shí)驗(yàn)；【實(shí)驗(yàn)內(nèi)容】1編寫一個(gè)程序，顯示水果的定購(gòu)行情。定義一個(gè)帶有參數(shù)的構(gòu)造方法，這些參數(shù)用于存放產(chǎn)品名，數(shù)量和價(jià)格。在主程序中輸出三種不同的水果。package fruit;public class Fruits String goodsname;int goodsamount;double goodsprice;public Fruits(String goodsname,int

2、goodsamount,double goodsprice) this.goodsname=goodsname; this.goodsamount=goodsamount; this.goodsprice=goodsprice;public void showinfo() System.out.println(產(chǎn)品名為+this.goodsname);System.out.println(產(chǎn)品數(shù)量為+this.goodsamount);System.out.println(產(chǎn)品價(jià)格為+this.goodsprice);package fruit;public class Fruit /* *

3、param args */public static void main(String args) / TODO Auto-generated method stubFruits f=new Fruits(apple,2,4);f.showinfo();Fruits f1=new Fruits(banana,2,3);f1.showinfo();Fruits f2=new Fruits(peach,2,2);f2.showinfo();2. 編寫一個(gè)學(xué)生類，封裝學(xué)生的學(xué)號(hào)、姓名、成績(jī)等信息。再編寫一個(gè)主類，主類中有一個(gè)打印學(xué)生信息的方法，該方法接受學(xué)生類對(duì)象為參數(shù)，并依次輸出學(xué)生信息；main

4、() 方法中生成學(xué)生類對(duì)象，并調(diào)用打印方法輸出學(xué)生信息。package student;public class Student privateString studentnumber;public String getStudentnumber() return studentnumber;public void setStudentnumber(String studentnumber) this.studentnumber = studentnumber;public String getStudentname() return studentname;public void setSt

5、udentname(String studentname) this.studentname = studentname;public double getStudentgrade() return studentgrade;public void setStudentgrade(double studentgrade) this.studentgrade = studentgrade;privateString studentname;privatedouble studentgrade;publicStudent()public Student(String studentnumber,

6、String studentname, double studentgrade) this.studentnumber = studentnumber;this.studentname = studentname;this.studentgrade = studentgrade;package student;public class Students public static void showinfo(Student s)System.out.println(學(xué)號(hào)為+s.getStudentnumber();System.out.println(姓名為+s.getStudentname(

7、);System.out.println(成績(jī)?yōu)?+s.getStudentgrade(); /* * param args */public static void main(String args) / TODO Auto-generated method stubStudent s=new Student(31011134,倪慶雨,60);Students.showinfo(s);3、編寫一個(gè)程序，用于創(chuàng)建一個(gè)名字Employee的父類和兩個(gè)名為Manager和Director的子類。Employee類包含3個(gè)屬性和一個(gè)方法，屬性為name,basic和address,方法名為show,

8、用于顯示這些屬性值。Manager類有一個(gè)名為department的屬性，Director類有一個(gè)名為transport的附加屬性。創(chuàng)建Manager和Director的類并顯示其詳細(xì)信息。package com.extend;public class Employee String name;public Employee(String name, String basic, String adress) super(); = name;this.basic = basic;this.adress = adress;String basic;String adress;pu

9、blic Employee ()public void show()System.out.println(姓名為+);System.out.println(基礎(chǔ)為+this.basic);System.out.println(地址為+this.adress);package com.extend;public class Manager extends Employee String department;publicManager()public Manager(String name, String basic, String adress,String departme

10、nt) super(name, basic, adress);this.department=department;/ TODO Auto-generated constructor stubpublic void show()super.show();System.out.println(部門為+this.department);package com.extend;public class Director extends Employee String transport;public Director(String name, String basic, String adress,S

11、tring transport) super(name, basic, adress);/ TODO Auto-generated constructor stubpublic Director()public void show()super.show();System.out.println(傳輸為+this.transport);package com.extend;public class Extends /* * param args */public static void main(String args) / TODO Auto-generated method stubEmp

12、loyee e=new Employee(小明,18,淮安);e.show();Manager m=new Manager(小剛,19,南京,商學(xué)院);m.show();Director d=new Director(小洪,23,泰州,火車);d.show();4、編寫一個(gè)程序，用于重寫父類Addition中名為add()的方法，該方法沒有實(shí)質(zhì)性的操作，僅輸出一條信息。add()方法在NumberAddition類中將兩個(gè)整數(shù)相加，而在TextConcatenation類則連接兩個(gè)String字符串。創(chuàng)建主類測(cè)試兩個(gè)子類中的add()方法。package lab1;public class A

13、ddition public void add()System.out.println(該方法沒有實(shí)質(zhì)性的操作，僅輸出一條信息);package lab1;public class NumberAddition extends Addition double result;public void add(double number1,double number2)result=number1+number2;System.out.println(兩個(gè)數(shù)相加為+result);package lab1;public class TextConcatenation extends Addition String result2;public void add(String number3,String number4)result2=number3+number4;System.out.println(連接字符串為+result2);package lab1;public class A /* * param args */public static void main(String args) / TOD