0x56794E 0x56794E - 7 months ago 24
Java Question

Why does this code using random strings print "hello world"?

The following print statement would print "hello world".
Could anyone explain this?

System.out.println(randomString(-229985452) + " " + randomString(-147909649));

looks like this:

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)

sb.append((char)('`' + k));

return sb.toString();


When an instance of java.util.Random is constructed with a specific seed parameter (in this case -229985452 or -147909649), it follows the random number generation algorithm beginning with that seed value.

Every Random constructed with the same seed will generate the same pattern of numbers every time.