Binary Convert

gistfile1.txt

import java.util.*;
public class BinaryConvert
{

    Scanner sc = new Scanner(System.in);

    public BinaryConvert(){

        System.out.println("Press 1 to convert decimal to binary, press 2 to do the opposite.");
        int which = sc.nextInt();
        if(which == 1){
            System.out.println("Please input your decimal number: ");
            int dec = sc.nextInt();
            ArrayList<Integer> newNum = new ArrayList<Integer>();
            while(dec >= 1){

                if(dec % 2 == 0){
                    newNum.add(0);
                }else{
                    newNum.add(1);
                }

                dec /= 2;

            }

            System.out.println("Number in binary: " + newNum);

        }else if(which == 2){
            System.out.println("Please input your binary number: ");
            int bin = sc.nextInt();
            int place = 1;
            int newNum = 0;
            while(bin >= 1){

                if(bin % 10 == 1){
                    newNum += place;
                }
                
                place *= 2;
                bin /= 10;
            }
            
            System.out.println("Number in decimal: " + newNum);
            
        }
    }

}