Cómo imprimir el triángulo de Pascal en un ejemplo de código Java

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Ejemplo: pascal triángulo java

/*
Author: Jeffrey Huang
*/
import java.util.*;publicclassPascalTriangleCreatorpublicstaticlongfactorial(long n)/*
        The whole purpose of this method is to find the factorial of a number,
        since java does not have a built in method for it. Calculating n choose 
        r is done using factorial, and since this code will be used repeatedly,
        it is wise to put it in a separate method.
        */long factorial;if(n==0)
            factorial=1;else
            factorial=1;for(int counter=1;counter<=n;counter++)
                factorial=factorial*counter;return factorial;publicstaticlongFinalValue(long n,long r)//Calculates n choose r by calling the factorial method.returnfactorial(n)/(factorial(n-r)*factorial(r));publicstaticvoidmain(String[] args)
     Scanner sc=newScanner(System.in);long rows=1;long i,j;while(rows!=0)rows>20)
      System.out.println("Invalid input.");
      System.out.println("How many rows of Pascal's triangle would you like to print? (0 to stop; 1-20 rows)");
      rows=sc.nextLong();/*
  The following if else block makes the code more efficient. Otherwise, if the user 
  enters zero at any other point than at the start of the loop, the program will go 
  through the long process of trying to print a triangle before terminating the
  program. 
  
  Using the following method, it is true that rows==0 is tested for twice, but
  it shortens the execution time immensely. And we know that when zero is true
  for the if statement, it is guaranteed to be true when breaking the loop.
  */if(rows==0)
      System.out.println("Program terminated by user.");elsefor(i =0; i < rows; i++)//Iterates through the number of rows required.for(j =0; j <= rows-i; j++)
           System.out.print("   ");//Iterates the printing of spaces.for(j =0; j <= i; j++)if((FinalValue(i, j))>9999)
             System.out.print(" ");elseif((FinalValue(i, j))>999)
             System.out.print("  ");elseif((FinalValue(i, j))>99)
             System.out.print("   ");elseif((FinalValue(i, j))>9)
             System.out.print("    ");else
            System.out.print("     ");
            System.out.print(FinalValue(i, j));//Prints a number of spaces plus a number.
         System.out.println();
 sc.close();

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