Java随机数介于0和0.06之间 [英] Java random number between 0 and 0.06

问题描述

在Java中，我需要在 0 和 0.06 之间随机生成一个数字。

In Java, I need to randomly generate a number between 0 and 0.06.

我在这里看到另一个问题，下面的代码可以解决这个问题：

I saw on another question on here that the following code would do the trick:

Random generator = new Random();
double number = generator.nextDouble() * .06;

然而，这样做会给我很长的数字，比如 0.007044013589130205 和 0.03656588431980957 ，我认为这不是我的导师所期待的。

However, doing that gives me really long numbers like 0.007044013589130205 and 0.03656588431980957, which I don't think is what my instructor is looking for.

有吗无论如何要生成0到0.06之间只有两位或三位小数的随机数？

Is there anyway to generate random numbers between 0 and 0.06 that only have two or three decimal places?

推荐答案

你可以这样做，如果你想要你的数字在[0; 0.06]和差异0.01之间的范围内：

You can do it this way, if you want you number to range between [0;0.06] with 0.01 of difference:

Random generator = new Random();
int number = generator.nextInt(7);
double result = number / 100.0;

您可以推广公式 number = generator.nextInt（max + 1 - min）+ min; 其中max将是您生成的最大数字，并且最小。这将从生成数字[min到max + 1]

You can generalize the formula number = generator.nextInt(max + 1 -min) + min; where max will be the biggest number that you what to generate and min the lowest. This will generate number from [min to max+1]

要增加小数位，你只需要除数量为1000,10000等。

To increase the decimal places you just have to divide number for 1000, 10000 and so on.

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