Contoh Program Konversi Bilangan ke Penyebutan Java

import java.util.Scanner;

public class KonversiBilangan{
    String[] angka={"","Satu","Dua","Tiga","Empat","Lima","Enam","Tujuh","Delapan","Sembilan","Sepuluh","Sebelas"};
    
    public String terbilang(long  x){
        int y;
        String bilang="";
        String[] satuan={""," Ribu "," Juta "," Milyar "," Trilyun "," Quadrilyun "," Quintilyun "};
        if(x > Math.pow(10, 20)) return "Bilangan terlalu besar";
        for(int i=6;i>0;i--){
            y =  (int) (x/Math.pow(10, i*3));
            if(y > 0){
                if(y==1 && i==1) bilang += " Seribu "; else bilang += sebut(y) + satuan[i];
            } x %= Math.pow(10, i*3);
        }
        bilang+=sebut((int)x);
        return bilang;
    }

    public String sebut(int x){
        String bilang="";
        int y = x / 100;
        if(y > 0){
            bilang = angka[y]+" Ratus ";
            if(y == 1)bilang="Seratus ";
            x%=100;
        }
        if(x<12)bilang += angka[x];
        else{
            y=x/10;
            x%=10;
            if(y==1)
                bilang +=angka[x] + " Belas";
            else
                bilang += angka[y]+ " Puluh "+ angka[x];
        }
        return bilang;
    }

    public static void main(String[] coedotz) {
        Scanner input = new Scanner(System.in);
        System.out.print("Masukan Bilangan yang akan disebut: ");
        System.out.println(new KonversiBilangan().terbilang(input.nextLong()));
        input.close();
    }
}