面对对象编程Demo

电影信息查询系统

整体实现难度不大，但是小细节容易出错。

   public static void main(String[] args) {
    //主方法
            //定义四个movie对象类型数组
           movie[] movies = new movie[4];
           //利用movie[0-3]是一个个地址，用有参构造器初始化每个对象
            movie m1 = new movie("水门桥",1,38.9,9.8,"吴京","徐克","12万");
            movie m2 = new movie("出拳吧！",2,39,7.8,"田雨","唐晓白","3.5万");
            movie m3 = new movie("月球陨落",3,42,7.9,"贝瑞","罗兰","17.9万");
            movie m4 = new movie("一点就到家",4,35,8.7,"刘昊然","许宏宇","10.8万");
            movies[0] = m1;
            movies[1] = m2;
            movies[2] = m3;
            movies[3] = m4;
    // 也可以movies[1] = new movie("水门桥",1,38.9,9.8,"吴京","徐克","12万");
    //创建一个电影操作类的对象，接收电影数据，对其经行业务处理
            operator movieOperator = new operator(movies);
    //        movieOperator.PrintfMoviesALL();
    //        movieOperator.searchMovieById(5);
            Scanner s = new Scanner(System.in);
    while (true) {
        System.out.println("-----------------------------------");
        System.out.println("-------欢迎使用小古电影系统！------");
        System.out.println("------1.显示系统所有电影信息------");
        System.out.println("------2.通过编号查询系统电影------");
        System.out.println("---------输入数字进行操作---------");
        System.out.println("-----------------------------------");
        int num = s.nextInt();
        switch (num) {
            case 1:
                movieOperator.PrintfMoviesALL();
                break;
            case 2:
                System.out.println("请输入你要查询的电影id:");
                int id = s.nextInt();
                movieOperator.searchMovieById(id);
                break;
            default:
                System.out.println("您输入的指令有误，请重新输入!");
        }
    }
        }
    }

package top.xiaoguyouqu.object;

public class movie {
//    电影对象实体类
    //定义成员对象
    private String name;//电影名
    private int id;//电影id
    private double price;//电影价格
    private double score;//电影平分
    private String actor;//电影主演
    private String director;//电影导演
    private String other;//其他信息


//必须提供一个公考的无参构造器
public movie(){

}

//贴心提供一个有参构造器
public movie(String name ,int id,double price,double score,String actor,String director,String other ){
    this.name = name;
    this.id = id;
    this.price = price;
    this.score = score;
    this.actor = actor;
    this.director = director;
    this.other = other;
}

//为每个成员提供get set 方法
public void setName(String name){
    this.name = name;
}
public String getName(){
    return name;
}
public void setId(int id){
    this.id = id;
}
public int getId(){
    return id;
}
public void setPrice(double price){
    this.price = price;
}
public double getPrice(){
    return price;
}
public void setScore(double score){
    this.score = score;
}
public double getScore(){
    return score;
}
public void setActor(String actor){
    this.actor = actor;
}
public String getActor(){
    return actor;
}
public void setDirector(String director){
    this.director = director;
}
public String getDirector(){
    return director;
}
public void setOther(String other){
    this.other = other;
}
public String getOther(){
    return other;
}
}

package top.xiaoguyouqu.object;

public class operator {
//    数据处理类
    //定义成员对象
private movie[] movies;
//将传入的数组赋给这个类的成员对象
public operator(movie[] movies){
    this.movies = movies;
}
//对数据进行处理

//1.展示系统中的全部电影
public void PrintfMoviesALL(){
    System.out.println("小古电影系统全部电影有：");
    for (int i = 0; i < movies.length; i++) {
        System.out.println("--------------------");
        System.out.println("电影名称："+movies[i].getName());
        System.out.println("电影id："+movies[i].getId());
        System.out.println("电影价格："+movies[i].getPrice());
        System.out.println("电影评分："+movies[i].getScore());
        System.out.println("电影主演："+movies[i].getActor());
        System.out.println("电影导演："+movies[i].getDirector());
        System.out.println("电影热度："+movies[i].getOther()+"人想看");
        System.out.println("--------------------");
    }
}

//2.允许用户通过电影编号id来查询某个电影的详细信息
public void searchMovieById(int id){
    for (int i = 0; i < movies.length; i++) {
        if (movies[i].getId() == id){
            System.out.println("-------------------");
            System.out.println("电影名称："+movies[i].getName());
            System.out.println("电影id："+movies[i].getId());
            System.out.println("电影价格："+movies[i].getPrice());
            System.out.println("电影评分："+movies[i].getScore());
            System.out.println("电影主演："+movies[i].getActor());
            System.out.println("电影导演："+movies[i].getDirector());
            System.out.println("电影热度："+movies[i].getOther()+"人想看");
            System.out.println("--------------------");
            return;
        }
    }
    System.out.println("很抱歉，没有找到有关该影片的信息！");
}
}