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Java oop的题2(重要5题):静态属性销售,动物类,电子产品类,抽象类人,系统

2020-02-26 23:57 作者:诗书画唱  | 我要投稿
  1. 创建商品类,包含商品名称,价格属性,包含静态属性销售总价格,实例 化三个商品对象,统计商品的总价格

package a;

class shangpin {

public static void main(String[] args) {

// class sp在class shangpin里面

sp s1 = new sp();


s1.ID = "1";

s1.price = 3000;

s1.name = "手机";


// 静态变量可以使用类名直接进行调用

sp s2 = new sp();

s2.ID = "2";

s2.price = 4000;

s2.name = "电脑";

// 静态变量可以使用类名直接进行调用

// 生命周期是程序加载到程序结束

// 可以被多个对象所共享

sp s3 = new sp();

s3.ID = "2";

s3.price = 2;

s3.name = "辣条";


sp.zongjiage = s1.price + s2.price + s3.price;

System.out.println(sp.zongjiage+"元。");


}

}


class sp {// class sp在class shangpin外面

public String ID; // 普通成员变量

public String name; // 普通成员变量

public double price;// 普通成员变量价格

// 统计商品的总价格

public static double zongjiage = 0; // 声明静态变量zongjiage

}





2.声明一个动物类,包含动物名称属性,声明动物叫的方法,声明犬类继承 动物类,重写叫的方法,打印犬类是汪汪的叫,声明猫类继承动物类,重写 叫的方法,打印猫类是喵喵的叫


package a;


public class animal {




public static void main(String[] args) {


dongwu c = new cat("黑猫");


c.sayc();



dongwu d = new  dog("白狗");


d.sayd();






}


}


class dongwu{


public String name;


public dongwu(String name) {


this.name = name;


}


public void sayc() {


System.out.println(this.name + "是喵喵的叫");


}


public void sayd() {


System.out.println(this.name + "是汪汪的叫");


}




}


class dog extends dongwu {


public dog(String name) {


super(name);


}


}


class cat extends dongwu {


public cat(String name) {


super(name);


}


}

3.声明一个电子产品类,包含功能的方法,声明电脑类继承自电子产品类, 重写功能的方法,声明手机类继承电子产品类,重写功能的方法,声明MP3继 承电子产品类,重写功能的方法,在主类里再声明一个判断的方法,根据传 入电子设备的不同打印不同的功能

package a;


public class demo {




public static void main(String[] args) {


DianZiChanPin  P = new  MP3("苹果电脑");


P.gongnengd();



DianZiChanPin  S = new  diannao("华为手机");


S.gongnengs();


DianZiChanPin M = new  diannao("诗书画唱MP3");


M.gongnengM();




}


}



class DianZiChanPin {


public String name;


public DianZiChanPin (String name) {


this.name = name;


}


public void gongnengd() {


System.out.println(this.name + "的功能是看钉钉");


}



public void gongnengs() {


System.out.println(this.name + "的功能是打电话");


}


public void gongnengM() {


System.out.println(this.name + "的功能是听歌");


}



}



class diannao extends DianZiChanPin  {


public diannao(String name) {


super(name);


}


}


class shouji extends DianZiChanPin  {


public shouji(String name) {


super(name);


}


}


class MP3 extends DianZiChanPin  {


public  MP3(String name) {


super(name);


}


}



按要改名的类,再按F2就可以换类的名。

4.声明抽象类人,包含编号,姓名,年龄属性,包含抽象方法吃饭,学习, 声明接口购物,声明接口上课,声明接口做备课,声明接口做作业,声明老 师类继承自抽象类人类实现购物和备课的接口,声明学生类继承抽象类人类 实现写作业和上课的接口,在main函数中进行调用


package b;


public class demo {

public static void main(String[] args) {

ren t = new teacher();// /向上转型,抽象类


gouwu t1 = new teacher();// 向上转型,接口


beike t2 = new teacher();

t.name = "诗书";

t.chifan();

t1.maidx();

t2.bk();

ren s = new student();

shangke s1 = new student();

zuozuoye s2 = new student();

s.name = "画唱";

s.xuexi();

s1.sk();

s2.zzy();

}


}


abstract class ren {

String id;

String name;

int age;


public abstract void chifan();


public abstract void xuexi();

// 抽象类不能包含学习,因为所有人不一定都学习,题目有错,这里按题目要求来,课程声明为接口

}


interface gouwu {

public abstract void maidx();

}


interface shangke {

public abstract void sk();

}


interface beike {

public abstract void bk();

}


interface zuozuoye {

public abstract void zzy();

}


class teacher extends ren implements gouwu, beike {


public void chifan() {

System.out.println(this.name + "在吃饭");

}


public void bk() {

System.out.println("在备课");

}


public void maidx() {

System.out.println("在买东西");


}


public void xuexi() {

}

}


class student extends ren implements zuozuoye, shangke {

public void xuexi() {

System.out.println(this.name + "在学习");

}


public void sk() {

System.out.println("在上课");

}


public void zzy() {

System.out.println("在做作业");

}


public void chifan() {

}

}


5.完善租车系统

package b;

import java.util.Scanner;

public class zuche{


public static void main(String[] args) {


che xiaohuoche=new huoche(1,"小货车",30, 0, 3);


che dahuoche=new huoche(2,"大货车",50,0, 5);


che xiaokeche=new keche(3,"小客车",40,4,0);


che dakeche=new keche(4,"大客车",80,10,0);


che xiaopika=new pika(5,"小皮车",60,2,4);


che dapika=new pika(6,"大皮车",100,4,8);


che[] c=new che[6];


c[0]=xiaohuoche;c[1]=dahuoche;c[2]=xiaokeche;


c[3]=dakeche;c[4]=xiaopika;c[5]=dapika;


yonghu yh=new yonghu();


che[] c_zuche = null;


while(true){


System.out.println("---------神舟租车系统-----------");


System.out.println("请输入你的操作:1.登录  2.注册  3.跳出系统");


Scanner s=new Scanner(System.in);


int num=s.nextInt();


if(num==1){


System.out.println("----执行登录操作----");


System.out.println("请输入用户名:");


String uname=s.next();


System.out.println("请输入你的密码");


String pwd=s.next();


if(uname.equals(yh.uname)&&pwd.equals(yh.pwd)){


System.out.println("登录成功!");


break;


}else{


System.out.println("登录失败");


}


}else if(num==2){


System.out.println("----执行注册操作----");


System.out.println("请输入用户名:");


String uname=s.next();


System.out.println("请输入你的密码");


String pwd=s.next();


System.out.println("请输入你的姓名");


String name=s.next();


yh.uname=uname;


yh.pwd=pwd;


yh.name=name;


System.out.println("注册成功!");


}else if(num==3){


System.exit(0);


}


}


//租车操作


while(true){


System.out.println("欢迎,"+yh.name+"请选择你的操作:");


System.out.println("1.查看车辆列表  2.进行租车  3.查看我的租车总价格,总载人量,总载物量 4.跳出系统");


Scanner s1=new Scanner(System.in);


int num=s1.nextInt();


if(num==1){


for(che i:c){/*相当于for(int i=0;i<c.length;i++)*/


i.jieshao();


}


}else if(num==2){


System.out.println("请输入你要租的车辆数");


int num1=s1.nextInt();


c_zuche=new che[num1];


for(int i=0;i<num1;i++){


System.out.println("请输入第"+(i+1)+"车辆的编号");


int bianhao=s1.nextInt();


switch(bianhao){


case 1:


c_zuche[i]=xiaohuoche;break;


case 2:


c_zuche[i]=dahuoche;break;


case 3:


c_zuche[i]=xiaokeche;break;


case 4:


c_zuche[i]=dakeche;break;


case 5:


c_zuche[i]=xiaopika;break;


case 6:


c_zuche[i]=dapika;break;


}


}


System.out.println("租车成功!");


}else if(num==3){


if(c_zuche==null){


System.out.println("你还没有进行租车呢!");


}else{


int zongjiage=0;


int zongzairenliang=0;


int zongzaiwuliang=0;


for(che i:c_zuche){


i.jieshao();


zongjiage+=i.jiage;


zongzairenliang+=i.zaikeliang;


zongzaiwuliang+=i.zaiwuliang;


}


System.out.println("总价格"+zongjiage+"总载人量"+


zongzairenliang+"总载物量"+zongzaiwuliang);


}


}else{


System.exit(0);/*终止系统,不可为break,break是跳出循环*/


}


}


}


}


class yonghu{


String uname;


String pwd;


String name;


}


abstract class che{



int bianhao;


String name;


int jiage;


int zaikeliang;


int zaiwuliang;


public che(int bianhao, String name, int jiage, int zaikeliang,


int zaiwuliang) {


this.bianhao = bianhao;


this.name = name;


this.jiage = jiage;


this.zaikeliang = zaikeliang;


this.zaiwuliang=zaiwuliang;


}


abstract void jieshao();


}


class huoche extends che {


public huoche(int bianhao, String name, int jiage,


int zaikeliang,int zaiwuliang) {


super(bianhao,name,jiage, zaikeliang,zaiwuliang);


}


void jieshao() {


System.out.println("编号"+this.bianhao+"\t名称"+this.name+


"\t价格"+this.jiage+"\t载物量"+this.zaiwuliang);


}


}


class keche extends che{


public keche(int bianhao, String name, int jiage, int zaikeliang,


int zaiwuliang) {


super(bianhao, name, jiage, zaikeliang, zaiwuliang);


}


void jieshao() {


System.out.println("编号"+this.bianhao+"\t名称"+


this.name+"\t价格"+this.jiage+"\t载人量"+this.zaikeliang);


}


}


class pika extends che{


public pika(int bianhao, String name, int jiage, int zaikeliang,


int zaiwuliang) {


super(bianhao, name, jiage, zaikeliang, zaiwuliang);


}


void jieshao() {


System.out.println("编号"+this.bianhao+"\t名称"+


this.name+"\t价格"+this.jiage+"\t载人量"+this.zaikeliang+"载物量"+


this.zaiwuliang);


}




}





Java oop的题2(重要5题):静态属性销售,动物类,电子产品类,抽象类人,系统的评论 (共 条)

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