java - 如何使用 Rectangle 类创建矩形数组？

Question

我正在做一项作业，该作业应该返回一个由 10 个矩形组成的数组，这些矩形具有从字符串中选择的随机高度、随机宽度和随机颜色。

该程序可以正常返回一个矩形的对象，但我如何实现这一点以创建一个包含 10 个矩形的数组，然后在循环中返回每个矩形？

这是我的类文件和我的对象:

import java.util.*;

public class Rectangle 
{
    private double width;
    private double height;
    public static String color = "White";
    private Date date;

Rectangle() {
    width = 1;
    height = 1;
    date = new Date(); 
    }

Rectangle (double w, double h) {
    width = w;
    height = h;
    date = new Date();
    }

public double getHeight() {
    return height;
    }

public void setHeight(double h) {
    height = h;
    }

public double getWidth() {
    return width;
    }

public void setWidth(double w) {
    width = w;
    }

public static String getColor() {
    return color;
    }

public static void setColor(String c) {
    color = c;
    }

public Date getDate() {
    return date;
    }

public void setDate (Date d) {
    date = d; 
    }

public double getArea() {
    return width * height;
    }

public double getPerimeter() {
    return 2  * (width + height);
    }

public String toString() {
    String S;
    S = "Rectangle with width of " + width;
    S = S + " and height of " + height;
    S = S + " was created on " + date.toString();
    return S;
    }

}

这是到目前为止我的客户端程序。我正在设置随机高度和随机宽度，并从颜色字符串中选择随机颜色。

我希望能够对 10 个不同矩形的数组执行此操作:

import java.util.*;

public class ClientRectangle 
{
    public static void main(String[] args)
    {
        String[] colors = {"White","Blue","Yellow","Red","Green"};

        Rectangle r = new Rectangle();
        int k;
        for(int i = 0; i < 10; i++)
        {
            r.setWidth((Math.random()*40)+10); 
            r.setHeight((Math.random()*40)+10);
            System.out.println(r.toString() + " has area of " + r.getArea() + " and perimeter of " + r.getPerimeter());
            k = (int)(Math.random()*4)+1;
            System.out.println(colors[k]);

        }



    }
}       

谢谢!

Answer 1

创建一个矩形数组并向每个索引添加一个矩形。

Rectangle[] arr = new Rectangle[10];

for(int i = 0; i < 10; i++)
{
 Rectangle r = new Rectangle();
 r.setWidth((Math.random()*40)+10); 
 r.setHeight((Math.random()*40)+10);

 arr[i] = r;
}