《类和对象》作业代码

1、一个景区根据游人的年龄收取不同价格的门票。

请编写游人类，根据年龄段决定能够购买的门票价格并输出package com.entity; //实体包import java.util.Scanner;public class Visitor {public String name;public String age;public void show(){Scanner input=new Scanner(System.in);while(!"n".equals(name)){System.out.print("请输入年龄：");int age=input.nextInt();if(age<10 || age>50){System.out.println(name+"的年龄是："+age+",门票免费");}else{System.out.println(name+"的年龄是："+age+",门票为20元");}System.out.print("请输入姓名：");name=input.next();} } }import java.util.Scanner; //测试包import com.entity.*;public class test2 {public static void main(String[] args) {Visitor visitor=new Visitor();Scanner input=new Scanner(System.in);System.out.print("请输入姓名：");=input.next();visitor.show();System.out.println("退出程序！")；}}2、输入旧的用户名和密码，如果正确，方有权限更新；从键盘获取新的密码，进行更新import java.util.Scanner;public class Bank {public String user="";public int password=0;public void show(){Scanner input=new Scanner(System.in);for(;;){System.out.println("请输入用户名：");String user1=input.next();System.out.println("请输入密码：");int password1=input.nextInt();if(user1.equals(er) && password1==bank1.password){System.out.println("登录成功，可以做修改了");System.out.println("请输入新用户名：");String newname=input.next();System.out.println("请输入新密码：");int newpassword=input.nextInt();System.out.println("新用户名是："+newname+",新密码是： "+newpassword);break;}else{System.out.println("用户名或密码错误，请重新登录");}}import com.*;public class Bank2 {public static void main(String [] args){Bank bank1=new Bank();er="admin1";bank1.password=111111;bank1.show();}}3、小明过生日，爸爸送他一个电动狮子玩具，编程测试这个狮子能否正常工作package com.entity1;public class Xiyouji {public String color="黄色";public String run(){return"正在疯狂地跑,";}public void sound(){System.out.println("并且唱着歌");}public String getcolor(){return color;}public void showLion(){System.out.print("这是一只"+getcolor()+"的小狮子,");}}import com.entity1.*;public class Xiyouji1 {public static void main(String[]args){Xiyouji lion=new Xiyouji();lion.showLion();System.out.print(lion.run());lion.sound();}}4、从键盘接收三门课分数，计算三门课的平均分和总成绩，编写成绩计算类实现功能package com.entity1;import java.util.Scanner;public class Xiyouji {Scanner input=new Scanner(System.in);public int sum;public double avg;public void score(){System.out.print("请输入java成绩：");int java_score=input.nextInt();System.out.print("C#成绩：");int c_score=input.nextInt();System.out.print("请输入DB成绩:");int DB_score=input.nextInt();sum=java_score+c_score+DB_score;avg=sum/3;}public void showScore(){System.out.print("总成绩是："+sum+",平均分是："+avg);}}import com.entity1.*;public class Xiyouji1 {public static void main(String[]args){Xiyouji score1=new Xiyouji();score1.score();score1.showScore();}}5、编写手机类（Phone）：可以下载音乐，可以播放这些音乐，可以进行充电package com.entity1;public class Xiyouji {public String brand="华为";public String downloadMusic(){return"安静-周杰伦";}public String playMusic(){return"同时播放着下载的音乐："+downloadMusic();}public void charge(){System.out.print("正在充电,");}}import com.entity1.*;public class Xiyouji1 {public static void main(String[]args){Xiyouji phone=new Xiyouji();phone.brand="华为手机";System.out.print(phone.brand);// phone.brandPhone();phone.charge();System.out.print(phone.playMusic());}}6、在实现了增加一个学生姓名的基础上，增加学生的学号、年龄和成绩，并显示这些信息，如何实现？package com.entity1;public class Student {public int number;public String name;public int age;public int score;static Student [] students=new Student [2];//static意思是静态，可以修饰类、字段、属性、方法，标记为static的就不用创建实例对象调用public static void show(){for(int i=0;i<2;i++){System.out.println(students[i].number+"\t"+students[i].name+"\t"+students[i].age +"\t"+students[i].score);}}public void addStudent(Student stu){for(int i=0;i<students.length;i++){if(students[i]==null){students[i]=stu;break;}}}}package test;import com.entity1.Student;public class StudentTest {public static void main(String[] args) {Student student1=new Student();student1.number=1000;="张三";student1.age=22;student1.score=80;Student student2=new Student();student2.number=1002;="张二";student2.age=21;student2.score=75;Student student=new Student();student.addStudent(student1);student.addStudent(student2);student.show();}}7、注册新用户，要求密码长度不能小于6位import java.util.*;public class Charset {public static void main(String[] args) {Scanner input=new Scanner(System.in);System.out.print("请输入用户名：");String username=input.next();System.out.print("请输入密码：");String password=input.next();if(password.length()<6){System.out.println("密码长度不能小于6");}else{System.out.println("注册成功");}}}7、注册新用户，要求密码长度不能小于6位，注册成功后，实现登录验证。