Pattern

import java.io.*;
class NUMBER_TRIANGLE
{
    public static void main(String args[])throws IOException
    {
        InputStreamReader reader=new InputStreamReader(System.in);
        BufferedReader input=new BufferedReader(reader);
        System.out.println("ENTER THE NUMBER OF ROWS TILL WHERE TRIANGLE SHOULD CONTINUE");
        int n=Integer.parseInt(input.readLine());
        int r=1;
        int t;
        for(int i=0;i<n;i++)
        {
            t=n-1;
            t=t-i;
            for(String space=" ";t>0;t--)
            {
                System.out.print(space);
            }
         
            for(int j=1;j<=r;j++)
            {
                System.out.print(j);
            }
            r=r+2;
            System.out.println();
        }
      
    }
}1>Download CLASS File
2>Download SOURCE CODE