segitiga kata menggunakan java

import java.io.*;

class babIX

{

            public static void main(String[] args) throws Exception

            {

                        DataInputStream aldy = new DataInputStream(System.in);

                        MyInput Input = new MyInput();

                        CetakSegitiga CS = new CetakSegitiga();

                        String Kalimat, Ulang = "n";

System.out.println("\n===============================================");

                        System.out.println("Nama\t\t: xxxxxxxxxxxxxxxxxxxxxx");

                        System.out.println("Npm\t\t: xxxxxxxxxxxxxxxxxxxxxxx");

System.out.println("===============================================\n");

                        do

                        {

                                    Kalimat = Input.InputString();

                                    CS.Cetak(Kalimat);               

System.out.println("\n===============================================");

System.out.print("Apakah anda ingin mengulang kembali(y/t):");

                                    Ulang = aldy.readLine();

                                    Ulang = Ulang.toLowerCase();

System.out.println("===============================================\n");

                        }

                        while (Ulang.equals("y"));

            }

}

class MyInput

{

            public String InputString() throws Exception

            {

                        DataInputStream aldy = new DataInputStream(System.in);

                        System.out.print("\nMasukkan kalimat\t: ");

                        String Input = aldy.readLine();

System.out.println("===============================================\n");

                        return Input;   

            }

}

class CetakSegitiga

{

            public static void Cetak(String Kalimat) throws Exception

            {

                        int Panjang = Kalimat.length()-1;

                        int Bantu = Panjang;              

                        for (int j=Panjang; j>=0; j--)

                        {

                                    for (int K=0; K<=j; K++)

                                    {

                                                System.out.print(" ");

                                    }

                                    for (int L=Bantu; L<=Panjang; L++)

                                    {

                                                System.out.print(Kalimat.charAt(L));

                                    }

                                    Bantu = Bantu-1;

                                    System.out.println();

                        }

            }

}