java - 在java中声明一个对象数组(包括代码)？

Question

public class Pig {
    private int pigss;
    private Pig[] pigs;

public Pig[] pigNumber (int pigss)
{
    pigs = new Pig [pigss];
    return pigs;
}

包含main方法的代码:

public class animals{

    public static void main(String[] args){

    Pig cool = new Pig();
    Scanner keyboard = new Scanner (System.in);

    System.out.println("How many pigs are there?");

    int pigss = Integer.parseInt( keyboard.nextLine() );
    cool.pigNumber(pigss);
    //This is where I have trouble. I want to use the array pigs here in the main method, this is what i tried:

    Pig[] pigs = cool.pigNumber(pigss);

然后我尝试使用 for 循环并将值(字符串)分配给数组索引(pigs[])。但给我的错误是:无法从 String 转换为 Pig。任何提示表示赞赏。谢谢。

     for(int j = 0; j < pigs.length; j++)
     {
      System.out.println("What is the pig " + (j+1) + "'s name");
      pigs[j] = keyboard.nextLine();

    }

Answer 1

您的 pig 将需要一个属性来包含您尝试传递的字符串值:

public class Pig {

    private String name;

    public void setName(String n) {
        name = n;
    }

    public String getName() {
        return name;
    }

然后当你想将此字符串值分配给你的 pig 时:

int indexOfPig = 0; // Or whatever it is supposed to be
pigs[indexOfPig].setName("I am a string");

在java中只能使用int作为数组的索引