Question

一些随机数生成，想知道我是否可以使用循环来生成所有这些数字，而不是将所有整数写出来。还有比这更好的方法吗？我可以直接离开吗？

    public static int rx1 = 0+(int)(Math.random()*760);
public static int ry1 = 0+(int)(Math.random()*555);
public static int rx2 = 0+(int)(Math.random()*760);
public static int ry2 = 0+(int)(Math.random()*555);
public static int rx3 = 0+(int)(Math.random()*760);
public static int ry3 = 0+(int)(Math.random()*555);
public static int rx4 = 0+(int)(Math.random()*760);
public static int ry4 = 0+(int)(Math.random()*555);
public static int rx5 = 0+(int)(Math.random()*760);
public static int ry5 = 0+(int)(Math.random()*555);
public static int rx6 = 0+(int)(Math.random()*760);
public static int ry6 = 0+(int)(Math.random()*555);
public static int rx7 = 0+(int)(Math.random()*760);
public static int ry7 = 0+(int)(Math.random()*555);
public static int rx8 = 0+(int)(Math.random()*760);
public static int ry8 = 0+(int)(Math.random()*555);
public static int rx9 = 0+(int)(Math.random()*760);
public static int ry9 = 0+(int)(Math.random()*555);
public static int rx10 = 0+(int)(Math.random()*760);
public static int ry10 = 0+(int)(Math.random()*555);
public static int rx11 = 0+(int)(Math.random()*760);
public static int ry11 = 0+(int)(Math.random()*555);
public static int rx12 = 0+(int)(Math.random()*760);
public static int ry12 = 0+(int)(Math.random()*555);
public static int ry13 = 0+(int)(Math.random()*555);
public static int rx13 = 0+(int)(Math.random()*760);
public static int rx14 = 0+(int)(Math.random()*555);
public static int ry14 = 0+(int)(Math.random()*555);
public static int rx15 = 0+(int)(Math.random()*760);
public static int ry15 = 0+(int)(Math.random()*555);

public static int rx16 = 0+(int)(Math.random()*760);
public static int ry16 = 0+(int)(Math.random()*555);
public static int rx17 = 0+(int)(Math.random()*760);
public static int ry17 = 0+(int)(Math.random()*555);
public static int rx18 = 0+(int)(Math.random()*760);
public static int ry18 = 0+(int)(Math.random()*555);
public static int rx19 = 0+(int)(Math.random()*760);
public static int ry19 = 0+(int)(Math.random()*555);
public static int rx20 = 0+(int)(Math.random()*760);
public static int ry21 = 0+(int)(Math.random()*555);
public static int rx21 = 0+(int)(Math.random()*760);
public static int ry22 = 0+(int)(Math.random()*555);
public static int rx22 = 0+(int)(Math.random()*760);
public static int ry23 = 0+(int)(Math.random()*555);
public static int rx23 = 0+(int)(Math.random()*760);
public static int ry24 = 0+(int)(Math.random()*555);
public static int rx24 = 0+(int)(Math.random()*760);
public static int ry25 = 0+(int)(Math.random()*555);
public static int rx25 = 0+(int)(Math.random()*760);
public static int ry26 = 0+(int)(Math.random()*555);
public static int rx27 = 0+(int)(Math.random()*760);
public static int ry28 = 0+(int)(Math.random()*555);
public static int rx28 = 0+(int)(Math.random()*760);
public static int ry29 = 0+(int)(Math.random()*555);
public static int ry30 = 0+(int)(Math.random()*555);
public static int rx30 = 0+(int)(Math.random()*760);
public static int rx31 = 0+(int)(Math.random()*555);
public static int ry31 = 0+(int)(Math.random()*555);
public static int rx32 = 0+(int)(Math.random()*760);
public static int ry32 = 0+(int)(Math.random()*555);

Answer 1

将它们放在两个数组中：

public static int[] x = new int[32];
public static int[] y = new int[32];

for(int i = 0; i < 32; i++)
{
    x[i] = (int)(Math.random()*760);
    y[i] = (int)(Math.random()*555);
}

Answer 2

您可以使用相同的数组。这是示例程序

package com.stackoverflow.test;

public class RandomCheck {

    public static void main(String args[]) {

        int[] tempArray = new int[64];

        for (int i = 0; i < 64; i++) {
            if (i % 2 == 0)
                tempArray[i] = (int) (Math.random() * 760);
            else
                tempArray[i] = (int) (Math.random() * 555);
        }

        for (int i = 0; i < 64; i++) {
            System.out.print(tempArray[i] + " , ");
        }

    }
}

Answer 3

您可以将for(;;)循环与ArrayList一起使用。从问题中不清楚是否需要这些数字的固定数量。

import java.util.ArrayList;
import java.lang.Math;
public class Main{

    public static void main(String args[]){
        int n = 32; // No of random numbers requried for x and y
        ArrayList<Integer> randomNumbersListX = new ArrayList<Integer>();
        ArrayList<Integer> randomNumbersListY = new ArrayList<Integer>();
        for(int i=1; i<=n ; i++){
             randomNumbersListX.add((int)(Math.random()*760));
             randomNumbersListY.add((int)(Math.random()*555));
        }
         for(int i=0; i<randomNumbersListX.size() ; i++){
            System.out.println("rx"+(i+1)+" "+randomNumbersListX.get(i));
            System.out.println("ry"+(i+1)+" "+randomNumbersListY.get(i));
        }
    }
}

为了使变量乘以而不是1000，您可以使用另一个Math.random()乘以1000.因此randomNumbersList.add((int)Math.random()*math.random()*1000);将成为解决方案。

请查看此Ideone snippet

Answer 4

这将是一种方法：

public static final int RX_SIZE = 32;
public static final int RY_SIZE = 32;
public static int rx[] = new int[RX_SIZE];
public static int ry[] = new int[RY_SIZE];

static {
    for(int i = 0; i < RX_SIZE; i++) {
        rx[i] = 0+(int)(Math.random()*760);
    }
    for(int i = 0; i < RY_SIZE; i++) {
        ry[i] = 0+(int)(Math.random()*555);
    }
}

但这取决于您的具体需求。

Answer 5

您可以按照here

所述使用Commons Math

示例，以下将生成一个50个长整数的随机序列，介于1和1,000,000之间，使用当前时间（以毫秒为单位）作为JDK PRNG的种子：

RandomData randomData = new RandomDataImpl(); 
for (int i = 0; i < 1000; i++) {
    value = randomData.nextLong(1, 1000000);
}

Answer 6

我们可以简单地使用java的random（）并将其作为：

public static int [] x = new int [32];

public static int [] y = new int [32];

for（int i = 0; i＆lt; 32; i ++）

{

x [i] =（int）（Math.random（）* 760）;

y[i] = (int)(Math.random()*555);

}

有关Math.random（）的更多信息，可以点击链接http://www.w3schools.com/jsref/jsref_random.asp http://msdn.microsoft.com/en-us/library/ie/41336409(v=vs.94).aspx

更好的方法来生成随机数

6 个答案: