如何实现Java的随机值每次不同？
如何实现Java的随机值每次不同？
提问于 2018-08-03 05:27:15
我在代码中使用了相同的随机对象，当我第一次测试我的程序时，我从随机代码中得到了以下值：
13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0, 80, 33, 3, 0, 45, 6, 2, 51, 50, 3, 0, 1, 1, 0, 2, 3, 0, 0, 2, 0, 3, 0, 1, 33, 1, 22, 7, 55, 92, 33, 1, 5, 6, 10, 2, 1, 85, 26, 1, 3, 42, 16, 0, 2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 4, 97, 57, 85, 28, 0, 2, 3, 9, 36, 1, 19, 4, 0, 71, 9, 2, 3, 76, 6, 3, 0, 96, 84, 22, 0, 0, 1, 1, 0, 1, 0, 0, 2, 0, 0, 0, 0, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 1, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0, 3, 0, 6, 1, 64, 39, 2, 0, 51, 31, 13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0, 80, 33, 3, 0, 45, 6, 2, 51, 50, 3, 0, 1, 1, 0, 2, 3, 0, 0, 2, 0, 3, 0, 1, 33, 1, 22, 7, 55, 92, 33, 1, 5, 6, 10, 2, 1, 85, 26, 1, 3, 42, 16, 0, 2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 4, 97, 57, 85, 28, 0, 2, 3, 9, 36, 1, 19, 4, 0, 71, 9, 2, 3, 76, 6, 3, 0, 96, 84, 22, 0, 0, 1, 1, 0, 1, 0, 0, 2, 0, 0, 0, 0, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 1, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0, 3, 0, 6, 1, 64, 39, 2, 0, 51, 31我第二次得到：
13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0, 2, 1, 1, 3, 1, 0, 33, 9, 61, 1, 2, 54, 59, 99, 28, 0, 88, 11, 0, 0, 92, 24, 0, 47, 43, 83, 13, 1, 1, 53, 46, 22, 0, 2, 0, 0, 0, 0, 2, 0, 13, 8, 1, 16, 6, 2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 0, 97, 57, 85, 28, 5, 2, 3, 3, 36, 4, 19, 0, 0, 71, 9, 2, 3, 76, 6, 0, 0, 0, 2, 4, 2, 0, 1, 0, 1, 1, 0, 0, 0, 2, 6, 1, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 0, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0, 13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0, 2, 1, 1, 3, 1, 0, 33, 9, 61, 1, 2, 54, 59, 99, 28, 0, 88, 11, 0, 0, 92, 24, 0, 47, 43, 83, 13, 1, 1, 53, 46, 22, 0, 2, 0, 0, 0, 0, 2, 0, 13, 8, 1, 16, 6, 2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 0, 97, 57, 85, 28, 5, 2, 3, 3, 36, 4, 19, 0, 0, 71, 9, 2, 3, 76, 6, 0, 0, 0, 2, 4, 2, 0, 1, 0, 1, 1, 0, 0, 0, 2, 6, 1, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 0, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0回答 2
Stack Overflow用户
发布于 2018-08-03 13:39:52
你的两个序列远不是随机整数序列，重复次数很多，子序列的大部分是相等的，应该是代码中有误导致的：
13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0,
80, 33, 3, 0, 45, 6, 2, 51, 50, 3, 0, 1, 1, 0, 2, 3, 0, 0, 2, 0, 3, 0, 1, 33, 1, 22, 7, 55, 92, 33, 1, 5, 6, 10, 2, 1, 85, 26, 1, 3, 42, 16, 0,
2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 4, 97, 57, 85, 28, 0, 2, 3, 9, 36, 1, 19, 4, 0, 71, 9, 2, 3, 76, 6, 3, 0, 96, 84, 22, 0, 0, 1, 1, 0, 1, 0, 0, 2, 0, 0, 0, 0, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 1, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0, 3, 0, 6, 1, 64, 39, 2, 0, 51, 31,
13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0,
80, 33, 3, 0, 45, 6, 2, 51, 50, 3, 0, 1, 1, 0, 2, 3, 0, 0, 2, 0, 3, 0, 1, 33, 1, 22, 7, 55, 92, 33, 1, 5, 6, 10, 2, 1, 85, 26, 1, 3, 42, 16, 0,
2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 4, 97, 57, 85, 28, 0, 2, 3, 9, 36, 1, 19, 4, 0, 71, 9, 2, 3, 76, 6, 3, 0, 96, 84, 22, 0, 0, 1, 1, 0, 1, 0, 0, 2, 0, 0, 0, 0, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 1, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0, 3, 0, 6, 1, 64, 39, 2, 0, 51, 31序列2：
// In sync with sequence 1
13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0,
// Out of sync with sequence 1
2, 1, 1, 3, 1, 0, 33, 9, 61, 1, 2, 54, 59, 99, 28, 0, 88, 11, 0, 0, 92, 24, 0, 47, 43, 83, 13, 1, 1, 53, 46, 22, 0, 2, 0, 0, 0, 0, 2, 0, 13, 8, 1, 16, 6,
// Back in sync!
2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 0, 97, 57, 85, 28, 5, 2, 3, 3, 36, 4, 19, 0, 0, 71, 9, 2, 3, 76, 6, 0, 0, 0, 2, 4, 2, 0, 1, 0, 1, 1, 0, 0, 0, 2, 6, 1, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 0, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0,
13, 9, 10, 12, 14, 11, 15, 10, 8, 6, 12, 9, 7, 7, 6, 1, 0, 0, 0,
// Out of sync again...
2, 1, 1, 3, 1, 0, 33, 9, 61, 1, 2, 54, 59, 99, 28, 0, 88, 11, 0, 0, 92, 24, 0, 47, 43, 83, 13, 1, 1, 53, 46, 22, 0, 2, 0, 0, 0, 0, 2, 0, 13, 8, 1, 16, 6,
// Back in sync....
2, 34, 0, 1, 2, 8, 0, 73, 1, 4, 66, 59, 49, 99, 2, 0, 97, 57, 85, 28, 5, 2, 3, 3, 36, 4, 19, 0, 0, 71, 9, 2, 3, 76, 6, 0, 0, 0, 2, 4, 2, 0, 1, 0, 1, 1, 0, 0, 0, 2, 6, 1, 58, 2, 1, 2, 1, 0, 1, 5, 0, 0, 0, 0, 4, 21, 59, 3, 1, 6, 3, 6, 0, 0, 3, 2, 2, 3, 5, 3, 0, 6, 5, 60, 3, 4, 4, 2, 6, 1, 3, 5, 1, 5, 26, 4, 0, 25, 5, 0, 61, 2, 0, 29, 2, 1, 34, 57, 55, 61, 1, 1, 21, 6, 1, 3, 0, 56, 6, 23, 6, 0, 47, 1, 1, 55, 0, 0, 5, 1, 4, 0, 57, 21, 45, 2, 0Stack Overflow用户
发布于 2018-08-03 15:21:14
- 这两种执行并不完全共享相同的调用顺序
- 在PRNG中发现了一个窃听器
- 建议你创建一个“尽可能短”的应用程序，该应用程序可以复制差异
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/-100000498
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