JAVA面向对象基础：案例--电影系统 成员变量与局部变量区别

package com.itheima.DuiXianganli;

public class Movie {
    private int id;
    private String name;
    private double price;
    private double score;
    private String director;
    private String info;
    public int getId() {
        return id;
    }


    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public double getScore() {
        return score;
    }

    public void setScore(double score) {
        this.score = score;
    }

    public String getDirector() {
        return director;
    }

    public void setDirector(String director) {
        this.director = director;
    }

    public String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }
    public Movie(int id, String name, double price, double score, String director, String info) {
        this.id = id;
        this.name = name;
        this.price = price;
        this.score = score;
        this.director = director;
        this.info = info;
    }

    public Movie() {
    }
}

package com.itheima.DuiXianganli;

public class MovieOperater {
    private Movie[] movies;
    public MovieOperater(Movie[] movies){
        this.movies=movies;
    }

    public void printAllMovies(){
        System.out.println("系统全部电影信息");
        for (int i = 0; i < movies.length; i++) {
            Movie m=movies[i];
            System.out.println("编号"+m.getId());
            System.out.println("名称"+m.getName());
            System.out.println("价格"+m.getPrice());
            System.out.println("-------------------------------");
        }
    }
    public void searchMovieByid(int id){
        for (int i = 0; i < movies.length; i++) {
            Movie m=movies[i];
            if( m.getId()==id){
                System.out.println("该电影详细信息：");
                System.out.println("编号"+m.getId());
                System.out.println("名称"+m.getName());
                System.out.println("价格"+m.getPrice());
                System.out.println("得分"+m.getScore());
                System.out.println("导演"+m.getDirector());
                System.out.println("详细信息："+m.getInfo());
                System.out.println("-------------------------------");
                return;//查找到了直接结束了，没有一直执行到输出”无“
            }
            System.out.println("无");
        }



    }

}

package com.itheima.DuiXianganli;

import java.util.Scanner;

public class DuiXianganli {
    public static void main(String[] args) {
        Movie[] movie = new Movie[4];
        Movie m1 = new Movie(1, "544", 56, 56, "vvv", "sdfdsfdsfsdf");
        Movie m2 = new Movie(2, "544", 56, 56, "vvv", "sdfdsfdsfsdf");
        Movie m3 = new Movie(3, "544", 56, 56, "vvv", "sdfdsfdsfsdf");
        Movie m4 = new Movie(4, "544", 56, 56, "vvv", "sdfdsfdsfsdf");
        for (int i = 0; i < movie.length; i++) {
            switch (i) {
                case 0:
                    movie[i] = new Movie(1, "544", 56, 56, "vvv", "sdfdsfdsfsdf");
                    break;
                case 1:
                    movie[i] = m2;
                    break;
                case 2:
                    movie[i] = m3;
                    break;
                case 3:
                    movie[i] = m4;
                    break;
            }
        }
        MovieOperater movieOperater = new MovieOperater(movie);
        while (true) {
            System.out.println("==电影系统==");
            System.out.println("1.查询电影所有信息");
            System.out.println("2.根据id查询某个电影的详细信息展示");
            System.out.println("3.退出系统");
            System.out.println("请您输入操作指令：");
            Scanner scanner = new Scanner(System.in);
            int num = scanner.nextInt();
            switch (num) {
                case 1:
                    movieOperater.printAllMovies();
                    break;
                case 2:
                    System.out.println("请您输入查询电影编号：");
                    int id = scanner.nextInt();
                    movieOperater.searchMovieByid(id);
                    break;
                case 3:
                    return;
                default:
                    System.out.println("您输入的内容有误");
            }
        }
    }
}