Question

How would I be able to input a chemical compound in order to get the molecular mass of the compound while using the Stacks class to find the sum but not use the Scanner class?

Answer 1

//Please comment it you have any queries

Answer:

Firstly, there are multiple ways to give input from the user in java. If you do not to use the Scanner class, then you can use BufferedReader class instead in Java.

To input chemical compound without Scanner class, you can use below code

Syntax:

import java.util.*;
import java.lang.*;
import java.io.*;
public class Stacks
{
   public static void main (String[] args) throws java.lang.Exception
   {
    BufferedReader chemicalCompound = new BufferedReader(new InputStreamReader(System.in));

  // Reading data using readLine

  String strChemicalCompound = chemicalCompound.readLine();
}
  

}

// Note: To read other types, we use functions like Integer.parseInt(), Double.parseDouble(). EX

int size = Integer.parseInt(chemicalCompound.readLine());