DecimalToBinary.java

import java.util.Scanner;

public class DecimalToBinary {
    
    public static void main(String[] args) {
        new DecimalToBinary().run();
    }

    public void toDecimal(int number){
        int binary[] = new int[number];
        int index = 0;
        while(number > 0){
            binary[index++] = number%2;
            number = number/2;
        }
        for(int i = index-1;i >= 0;i--){
            System.out.print(binary[i]);
        }
    }

    private void run() {
        toDecimal(input("Enter a Decimal: "));
    }
    
    public int input(String msg) {
        System.out.println(msg);
        return new Scanner(System.in).nextInt();
    }    
}