为什么这段代码使用随机字符串打印出了”hello world”

Question

System.out.println(randomString(-229985452) + " " + randomString(-147909649)); public static String randomString(int i){ Random ran = new Random(i); StringBuilder sb = new StringBuilder(); while (true) { int k = ran.nextInt(27); if (k == 0) break; sb.append((char)('`' + k)); } return sb.toString(); } 从这篇博客看到的这个问题，但是他的解释，我没看明白。希望大神解释下。

Answer 1

 

new Random(-229985452).nextInt(27)
The first 6 numbers that the above random generates are:

8
5
12
12
15
0
and the first 6 numbers that new Random(-147909649).nextInt(27) generates are:

23
15
18
12
4
0
Then just add those numbers to the integer representation of the character ` (which is 96):

8 + 96 = 104 --> h
5 + 96 = 101 --> e
12 + 96 = 108 --> l
12 + 96 = 108 --> l
15 + 96 = 111 --> o

23 + 96 = 119 --> w
15 + 96 = 111 --> o
18 + 96 = 114 --> r
12 + 96 = 108 --> l
4 + 96 = 100 --> d