Display fixed numbers pyramid pattern java

Write a program to display the following output

1
1 1
1 1 1

import java.util.Scanner;
public class NumberGenerator
{
   public static void main(String[] args)
   {
            int i,j;
            System.out.println("ENTER THE NUMBER TO BE DISPLAYED :-");
            Scanner sc=new Scanner(System.in);
            int a=sc.nextInt();
            System.out.println("ENTER THE SIZE :-");
            int n=sc.nextInt();
            for(i=0;i<n;i++)
             {
                        for(j=0;j<=i;j++)
                        System.out.print(" "+a);
                        System.out.println();
            } 
}