Topic: 请教产生随机数的范围？

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1.请教产生随机数的范围？ Copy to clipboard
Posted by: soskitty
Posted on: 2005-05-31 21:18

书上说 Math.random（）方法产生“介于”0与1之间的随机数，请问包不包括1？
拿例子来说就是：(int)(Math.random()*20)有没有可能产生20？

顺便问一下我想自己测试的话该怎么测试？

谢谢！
2.Re:请教产生随机数的范围？ [Re: soskitty] Copy to clipboard
Posted by: why
Posted on: 2005-05-31 21:35

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Math.html#random()
Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0.

What do you wnat to 自己测试?
3.Re:请教产生随机数的范围？ [Re: soskitty] Copy to clipboard
Posted by: soskitty
Posted on: 2005-06-01 09:32

谢谢元老！！
4.Re:请教产生随机数的范围？ [Re: soskitty] Copy to clipboard
Posted by: yinpeng263
Posted on: 2005-06-08 03:59

demo code

http://www.java2s.com/ExampleCode/Development-Class/Random.htm

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