Question

我正在尝试创建一个允许用户输入有关电影的信息的数组

public void addMovie() {
  for(int x = 0; x < mlist.length; x++) {
     mlist[x] = new Movies();
     System.out.println("What is the title of the movie? ");
     title = scan.nextLine();
     System.out.println("What is the genre of the movie? ");
     genre = scan.nextLine();
     System.out.println("Who is the director of the movie? ");
     director = scan.nextLine();
     System.out.println("What is the cost of the movie? ");
     cost = scan.nextInt();
  }
}

当我编译时，它说

mlist[x] = new Movies();

构造函数类电影中的电影无法应用于给定类型;

完整代码：

import java.util.Scanner;

public class Movies
{
   private String title, genre, director;
   private int cost;
   Movies mlist[] = new Movies[5];

   Scanner scan = new Scanner(System.in);

   public Movies(String mtitle, String mgenre, String mdirector, int mcost)
   {
      title = mtitle;
      genre = mgenre;
      director = mdirector;
      cost = mcost;
   }

   public void addMovie()
   {
      for(int x = 0; x < mlist.length; x++)
      {
         mlist[x] = new Movies();
         System.out.println("What is the title of the movie? ");
         title = scan.nextLine();
         System.out.println("What is the genre of the movie? ");
         genre = scan.nextLine();
         System.out.println("Who is the director of the movie? ");
         director = scan.nextLine();
         System.out.println("What is the cost of the movie? ");
         cost = scan.nextInt();
      }
   }


   public String getTitle()
   {
      return title;
   }
   public String getGenre()
   {
      return genre;
   }
   public String getDirector()
   {
      return director;
   }
   public int getCost()
   {
      return cost;
   }
}

Answer 1

在函数addMovie（）中，您将从用户那里获取输入，而不是在任何地方使用它。不要调用无参数构造函数，而是调用您创建的参数化构造函数，并将输入值传递给此构造函数。

代码：

public void addMovie() {
    for (int x = 0; x < mlist.length; x++) {
        // Deleted the call to default constructor.
        System.out.println("What is the title of the movie? ");
        title = scan.nextLine();
        System.out.println("What is the genre of the movie? ");
        genre = scan.nextLine();
        System.out.println("Who is the director of the movie? ");
        director = scan.nextLine();
        System.out.println("What is the cost of the movie? ");
        cost = scan.nextInt();
        // Added this code
        mlist[x] = new Movies(title,genre,director,cost);
    }
}

这应解决错误。

无法初始化每个数组索引中的对象

1 个答案: