Perulangan bersarang Java (input Buffer)

Membuat segitiga atas
import java.io.*;
class Bintang1
{
   public static void main(String[] args)throws IOException
  {
  BufferedReader br;
  br = new BufferedReader(new InputStreamReader(System.in));

int i,j,n;
System.out.print("Nilai n : ");
n = Integer.parseInt(br.readLine());
  for (i=1; i<=n; i++)
{
for (j=0; j<i; j++)
{
System.out.print("*");
}
System.out.println("");
}
}
  }
hasil :

Membuat segitiga bawah
import java.io.*;
class Bintangbawah
{
   public static void main(String[] args)throws IOException
  {
  BufferedReader br;
  br = new BufferedReader(new InputStreamReader(System.in));

int i,j,n;
System.out.print("Nilai n : ");
n = Integer.parseInt(br.readLine());
  for (i=1; i<=n; i++)
{
for (j=0; j<=n-i; j++)
{
System.out.print("*");
}
System.out.println("");
}
}
  }
hasilnya :

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