Java Program to Generate Random Numbers Using Middle Square Method

Code:

import java.util.Random;
import java.util.Scanner;


public class Middle_Suqare_Method 
{
    static int a[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000};
    static int middleSquareNumber(int numb, int dig)
    {
        int sqn = numb*numb, next_num=0;
        int trim = (dig/2);
        sqn = sqn / a[trim];
        for(int i=0; i
        {
            next_num += (sqn%(a[trim]))*(a[i]);
            sqn = sqn/10;
        }
        return next_num;
    }
    public static void main(String args[])
    {
        System.out.println("Enter the #-digit random numbers you want: ");
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int start=1, end=1;

        start = a[n-1];
        end = a[n]; 

        Random rand = new Random();
        int number = rand.nextInt(end-start)+start;
        System.out.print("The random numbers are:\n" +number+", ");
        int new_number=0;
        for(int i=0; i<9 font="" i="">
        {
            number = Middle_Suqare_Method.middleSquareNumber(number, n);
            System.out.print(number+", ");
        }
        System.out.print("...");

        sc.close();
    }
}


Output:

Enter the #-digit random numbers you want: 
2
The random numbers are:
89, 92, 46, 11, 12, 14, 19, 36, 29, 84, ...


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