random seed什么意思

最新推荐文章于 2024-10-31 14:28:57 发布

phoenix_cat

最新推荐文章于 2024-10-31 14:28:57 发布

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分类专栏： java 文章标签： c/c++ c# 人工智能

本文链接：https://blog.youkuaiyun.com/phoenix_cat/article/details/84653986

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本文探讨了随机数生成的原理，特别是加入种子的情况下如何确保生成值的一致性。此外，还提供了一个生成不重复7位随机字符串的示例算法，可用于密码或唯一标识符的创建。

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简而言之，加种子，生成的值是相等的，不加种子，是以当前系统时钟为种子的，生成的随机数是不相等的。

refurl:http://blog.sina.com.cn/s/blog_64d5f4bd0100h0zz.html

另外，放一个生成不重复的7位数的算法：

String arr[]={"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","i"
				,"j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"
				,"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","I"
				,"J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"
				,"!","@","#","$","%","^","&","*"};
		String myRandom="";
		for(int i=0;i<7;i++){
			int lotteryNumber=new Random().nextInt(60);
			myRandom=myRandom+arr[lotteryNumber];
		}
		System.out.println("myRandom:"+myRandom);

7位不重复的数字参考URL：

http://bbs.youkuaiyun.com/topics/320148022