如何创建矩形的一个矩形类的数组？ [英] How to create an array of Rectangles with a Rectangle class?

问题描述

我的工作是应该用随机高度，随机宽度和颜色随机从一个字符串返回选定的10矩形阵列的分配。

I'm working on an assignment that is supposed to return an array of 10 rectangles with a random height, random width, and random color selected from a string.

该程序工作正常，返回的对象的一个​​四边形，但我将如何实现这个创造的10矩形阵列，然后返回在一个循环中每一个？

The program works fine to return the objects for ONE rectangle, but how would I implement this to create an array of 10 rectangles and THEN return each one in a loop?

下面是我的对象我的类文件：

Here's my class file with my objects:

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。我设置一个随机的高度和宽度随机并从颜色串随机颜色。

Here is my client program so far. I am setting a random height and a random width and selecting a random color from the colors String.

我希望能够为10个不同的矩形阵列做到这一点：

I would like to be able to do this for an array of 10 different rectangles:

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！

推荐答案

创建矩形阵列和矩形添加到每个索引。

Create an array of rectangles and add a rectangle to each index.

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;
}

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