Java guessing the system gets random numbers

int randomnumber= (int) (Math.random () *8) +1;

  The comment is: Get a random integer from 1 to 8.

/*************************************************************************
> File Name:GuessNumber.java
> author:ma6174
> Mail: [email protected]
> Created time:2016 October 14 Friday 08:01 14 seconds
************************************************************************/

Import Java.util.Scanner;

Class Guessnumber {
public static void Main (string[] args) {
int randomnumber = (int) (Math.random () *100) + 1;
System.out.println (Randomnumber);

while (true) {

Scanner sc = new Scanner (system.in);
SYSTEM.OUT.PRINTLN ("Pls your guess number 0~100");

int guessnumber = Sc.nextint ();

if (Guessnumber > Randomnumber)
SYSTEM.OUT.PRINTLN ("error = = = guessnumber > randomnumber");
else if (Guessnumber < Randomnumber)
SYSTEM.OUT.PRINTLN ("error = = = Guessnumber < Randomnumber");
Else
{
System.out.println ("Good good boy!!!");
Break
}
}

}
}

Java guessing the system gets random numbers