java将信息存储到另一个类的数组中

Question

我已经做了一段时间了，但似乎还没弄明白。我需要将用户输入从另一个对象存储到一个数组中，但我无法让它工作。我不确定这是我的构造器还是我遗漏了什么，但我们非常感谢您的帮助

这是输出程序

    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       System.out.println("Enter   'p' to create a polygon");
       String in = sc.next();

    if (in.equals("p")) {
        System.out.println("How many sides?");
        int numSides = sc.nextInt();
        int side=0; 

        Polygon ps;
        for (int i = 1; i <= numSides; i++) {

            System.out.println("Enter the length of side " + i);
            side = sc.nextInt();
             ps = new Polygon(side);

        }
         ps = new Polygon(side);

这是另一个类的构造函数

public class Polygon {
    protected int[] sideLengths;


public Polygon(int sides){
    sideLengths= new int[sides];

}

Answer 1

 public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       System.out.println("Enter   'p' to create a polygon");
       String in = sc.next();


            if(in.equalsIgnoreCase("p")) {
                Integer sides[];
                System.out.println("How many sides?");
                int numSides = sc.nextInt();
                int side=0; 
                if(numSides>0){
                    sides = new Integer[numSides];
                }
                Polygon ps;
                for (int i = 1; i <= numSides; i++) {

                    System.out.println("Enter the length of side " + i);
                    side = sc.nextInt();
                    sides[i] = side;

                }

                ps = new Polygon(sides);
            }
     }

public class Polygon {
    private Integer[] sides;
    public Polygon(Integer[] sides){
        this.sides = sides;
    }
}

现在我们已经创建了一个边大小的数组，数组作为参数传递给构造函数，用于初始化多边形的对象