英文:
How do I take user input and store it into an array that is in another class? || Java
问题
以下是翻译好的内容：
我正在尝试获取多个用户输入（在这种情况下是字符串/名称），并将其存储到另一个类中的数组中。
根据我所研究的内容，许多建议使用列表而不是数组，但在这种情况下指定要使用数组。
我能够通过使用旨在接收整数输入的代码来分解问题，我已经对其进行了更改以接收字符串，然而，在我输入例如要输入3个名称的情况下，代码提示我输入名称，只允许输入2个。
这是初始化数组的类：
public class Movie {
private String id;
private String name;
private String description;
private String[] genre;
private String[] actors;
private String[] language;
private String countryOfOrigin;
private Map<String, Integer> ratings;
// 构造函数
public Movie(String id, String name, String description, String[] genre, String[] actors, String[] language, String countryOfOrigin, Map<String, Integer> ratings){
this.id = id;
this.name = name;
this.description = description;
this.genre = genre;
this.actors = actors;
this.language = language;
this.countryOfOrigin = countryOfOrigin;
this.ratings = ratings;
}
// 设置器
public void setid(String id){
this.id = id;
}
public void setname(String name){
this.name = name;
}
public void setDescription(String description){
this.description = description;
}
public void setGenre(String[] genre){
this.genre = genre;
}
public void setActors(String[] actors){
this.actors = actors;
}
// 获取器
public String getId(){
return id;
}
public String getName(){
return name;
}
public String getDescription(){
return description;
}
public String[] getGenre(){
return genre;
}
public String[] getActors(){
return actors;
}
}
这是带有人们输入姓名代码的主文件：
public class Main {
public static void main(String[] args) {
// 初始化Scanner
Scanner input = new Scanner(System.in);
System.out.println("有多少位演员主演这部电影？：");
int num = input.nextInt();
String array[] = new String[num];
System.out.println("现在输入这" + num + "位演员的姓名：");
for (int i = 0; i < array.length; i++){
array[i] = input.nextLine();
}
}
}
我的问题是我不确定是否需要首先将值存储到本地数组“array”中，然后将该数组分配给类Movie的演员数组，还是直接将值分配给类Movie的演员数组。如果是这样，我不确定如何做到这一点。
我上面提到的另一个问题是，如果我要求存储3个名称，它只允许我输入2个。
英文:
I'm trying to take multiple user inputs (which will be strings in this case / names) and store it into an array that is in another class
Based on what I've researched many advise to use a list instead of an array, but in this case an array was specified to be used.
I was able to breakdown the problem by using code that was meant to receive an integer as input and I had made changes to receive a string instead, however, in the case where I entered for example, 3 names were to be entered and the code prompted me to enter the names, only 2 were allowed to be entered
Here's the class where the array was initialized
public class Movie {
private String id;
private String name;
private String description;
private String[] genre;
private String[] actors;
private String[] language;
private String countryOfOrigin;
private Map<String, Integer> ratings;
//Constructor
public Movie(String id, String name, String description, String[] genre, String[] actors, String[] language, String countryOfOrigin, Map<String, Integer> ratings){
this.id = id;
this.name = name;
this.description = description;
this.genre = genre;
this.actors = actors;
this.language = language;
this.countryOfOrigin = countryOfOrigin;
this.ratings = ratings;
}
//setters
public void setid(String id){
this.id = id;
}
public void setname(String name){
this.name = name;
}
public void setDescription(String description){
this.description = description;
}
public void setGenre(String[] genre){
this.genre = genre;
}
public void setActors(String[] actors){
this.actors = actors;
}
//getters
public String getId(){
return id;
}
public String getName(){
return name;
}
public String getDescription(){
return description;
}
public String[] getGenre(){
return genre;
}
public String[] getActors(){
return actors;
}
Here's the main file with the code for the person to enter the names
public class Main{
public static void main(String[] args) {
//Scanner initialization
Scanner input = new Scanner(System.in);
System.out.println("How many actors star in this movie?: ");
int num = input.nextInt();
String array[] = new String[num];
System.out.println("Enter the " + num + " actors starred now");
for (int i = 0; i < array.length; i++){
array[i] = input.nextLine();
}
}
My problem is I'm not sure if I need to first store the values into the local array "array" and THEN assign said array to the class Movie actors array, or if I need to directly assign the values into the class Movie actors array. If so, I'm unsure how to do that.
My other problem is the one mentioned above where if I entered 3 names to be stored, it only allows me to enter 2
答案1
得分: 0
import java.util.Arrays;
import java.util.Scanner;
class Movie {
private String[] actors;
private String director;
private int year;
Movie() {
}
public Movie(String[] actors, String director, int year) {
this.actors = actors;
this.director = director;
this.year = year;
}
public String[] getActors() {
return actors;
}
public void setActors(String[] actors) {
this.actors = actors;
}
public String getDirector() {
return director;
}
public void setDirector(String director) {
this.director = director;
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
@Override
public String toString() {
return "Movie [actors=" + Arrays.toString(actors) + ", director=" + director + ", year=" + year + "]";
}
}
public class Main {
public static void main(String[] argv) throws Exception {
// Scanner initialization
Scanner input = new Scanner(System.in);
System.out.print("How many actors star in this movie?: ");
int num = Integer.parseInt(input.nextLine());
String array[] = new String[num];
System.out.println("Enter the " + num + " actors starred now");
for (int i = 0; i < array.length; i++) {
array[i] = input.nextLine();
}
System.out.print("Enter the name of the director:");
String director = input.nextLine();
System.out.print("Enter the release year:");
int year = Integer.parseInt(input.nextLine());
Movie movie1 = new Movie(array, director, year);
// Alternatively
Movie movie2 = new Movie();
movie2.setActors(array);
movie2.setDirector(director);
movie2.setYear(year);
// Display
System.out.println(movie1);
}
}
Use Scanner::nextLine instead of Scanner::nextInt. The problem you are facing is because the new line character (Enter) after the int input is being assigned to array[0]. Check https://stackoverflow.com/questions/13102045/scanner-is-skipping-nextline-after-using-next-or-nextfoo for more information.
A sample run:
How many actors star in this movie?: 2
Enter the 2 actors starred now
James
Bond
Enter the name of the director:Xyz
Enter the release year:2010
Movie [actors=[James, Bond], director=Xyz, year=2010]
<details>
<summary>英文:</summary>
> My problem is I'm not sure if I need to first store the values into
> the local array "array" and THEN assign said array to the class Movie
> actors array, or if I need to directly assign the values into the
> class Movie actors array. If so, I'm unsure how to do that.
Do it as follows:
import java.util.Arrays;
import java.util.Scanner;
class Movie {
private String[] actors;
private String director;
private int year;
Movie() {
}
public Movie(String[] actors, String director, int year) {
this.actors = actors;
this.director = director;
this.year = year;
}
public String[] getActors() {
return actors;
}
public void setActors(String[] actors) {
this.actors = actors;
}
public String getDirector() {
return director;
}
public void setDirector(String director) {
this.director = director;
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
@Override
public String toString() {
return "Movie [actors=" + Arrays.toString(actors) + ", director=" + director + ", year=" + year + "]";
}
}
public class Main {
public static void main(String[] argv) throws Exception {
// Scanner initialization
Scanner input = new Scanner(System.in);
System.out.print("How many actors star in this movie?: ");
int num = Integer.parseInt(input.nextLine());
String array[] = new String[num];
System.out.println("Enter the " + num + " actors starred now");
for (int i = 0; i < array.length; i++) {
array[i] = input.nextLine();
}
System.out.print("Enter the name of the director:");
String director = input.nextLine();
System.out.print("Enter the release year:");
int year = Integer.parseInt(input.nextLine());
Movie movie1 = new Movie(array, director, year);
// Alternatively
Movie movie2 = new Movie();
movie2.setActors(array);
movie2.setDirector(director);
movie2.setYear(year);
// Display
System.out.println(movie1);
}
}
> My other problem is the one mentioned above where if I entered 3 names
> to be stored, it only allows me to enter 2
Use `Scanner::nextLine` instead of `Scanner::nextInt`. The problem you are facing is because the new line character (Enter) after the `int` input is being assigned to `array[0]`. Check https://stackoverflow.com/questions/13102045/scanner-is-skipping-nextline-after-using-next-or-nextfoo for more information.
**A sample run:**
How many actors star in this movie?: 2
Enter the 2 actors starred now
James
Bond
Enter the name of the director:Xyz
Enter the release year:2010
Movie [actors=[James, Bond], director=Xyz, year=2010]
</details>
# 答案2
**得分**: 0
你可以用多种方法解决这个问题，因为你声明了私有数组 actors，所以你需要使用 getter 和 setter 方法来设置和获取数据。你还缺少一个构造函数。
```java
public class Movie
{
private String[] actors;
public Movie(String[] actors)
{
this.actors = actors;
}
public String[] getActors()
{
return actors;
}
public void setActors(String[] actors)
{
this.actors = actors;
}
}
然后你可以简单地创建一个新的 Movies 对象并将数组放入其中，就像这样：
Movies movies = new Movies(array);
System.out.println(Arrays.toString(anime.getActors()));
以获取存储在你的数组中的所有演员。
英文:
You can approach this problem in many ways, since you declared the array actors private you will need to use a getter and setter method to set and get the data. You also are missing a constructor.
public class Movie
{
private String[] actors;
public Movie(String[] actors)
{
this.actors = actors;
}
public String[] getActors()
{
return actors;
}
public void setActors(String[] actors)
{
this.actors = actors;
}
}
Then you can simply create a new object Movies and put in your array like this:
Movies movies = new Movies(array);
System.out.println(Arrays.toString(anime.getActors()));
to get all the actors stored in your array.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论