Question

我想使用for循环向用户询问3部电影的标题，流派和评级，并将信息存储在一个数组中，然后将信息显示给他们。实例变量是私有的，使用了getter和setter但是我不知道在尝试使用for循环获取信息时如何使用MovieTestDriver类中的getter和setter。

class Movie {

    // Create instance variables for the Movie class.
    private String title;
    private String genre;
    private int rating;

    // Use getters and setters to set and display the variables.
    // Getters.
    public String getTitle() {
        return title;
    }
    public String getGenre() {
        return genre;
    }
    public int getRating() {
        return rating;
    }

    // Setters.
    public void setTitle(String newTitle) {
        title = newTitle;
    }
    public void setGenre(String newGenre) {
        genre = newGenre;
    }
    public void setRating(int newRating) {
        rating = newRating;
    }

    void playIt() {
        System.out.println(getTitle() + "- Now Playing!");
    }
}

import java.util.Scanner;

public class MovieTestDriver {

    public static void main(String[] args) {

    Scanner input = new Scanner(System.in);

    // Creates a Movie array of size 3.
    Movie[] movies = new Movie[3];  
    String getTitle;
    String getGenre;
    int getRating;
    // Allows user to enter variables 3 times and populate movie object and store them in an array.
    for (int i=0; i< movies.length; i++) {
        System.out.println("Please enter the title of Movie " + (i+1));
        getTitle = input.nextLine();
        System.out.println("Please enter the genre of Movie " + (i+1));
        getGenre = input.nextLine();
        System.out.println("Please enter the rating (1-5) of Movie " + (i+1));
        getRaing = input.nextInt();

    }

}

Answer 1

使用其他方法创建电影实例。并且可以通过另一个来显示电影:)这样你的代码就会清晰可读。

 public static void main(String[] args) {

    Scanner input = new Scanner(System.in);

    // Creates a Movie array of size 3.
    Movie[] movies = new Movie[3];  
    // Allows user to enter variables 3 times and populate movie object and store them in an array.
    for (int i=0; i< movies.length; i++) {
       movies[i] = inputMovie(input);
    }
 }

 private static Movie inputMovie(Scanner input){
        Movie movie = new Movie();
        System.out.println("Please enter the title of Movie " + (i+1));
        movie.setTitle(input.nextLine());
        System.out.println("Please enter the genre of Movie " + (i+1));
        movie.setGenre(input.nextLine());
        System.out.println("Please enter the rating (1-5) of Movie " + (i+1));
        movie.setRating(input.nextInt());
        return movie;
 }

用于在Java中封装时用户输入的循环

1 个答案: