Java Programming

Hi, everyone! I am writing a program to translate English text to morse code. I need to use space to seperate between characters, but not necessarily to seperate words with forwars slash(/).
And here is the code I wrote:

import java.util.*;

public class MorseCode
{
  public static void main(String[]args)
  {
      Scanner s = new Scanner(System.in);
      System.out.println("Please input the English text you want to translate:");
      String input = s.nextString();
      s.nextLine();
      MorseCode x = MorseCode();
                                
      String result = x.encode(input);
      System.out.println("The result is:" + result);
    }
    public static String encode(String input)
    {
        String input1 = input.toLowerCase();
        for(int i=0; i<input1.length(); i++)
        char c = input1.charAt(i);
        switch(c)
        {
            case a:
            System.out.print(".- ");
            break;
            case b:
            System.out.print("-... ");
            break;
            case c:
            System.out.print("-.-. ");
            break;
            case d:
            System.out.print("-.. ");
            break;
            case e:
            System.out.print(". ");
            break;
            case f:
            System.out.print("..-. ");
            break;
            case g:
            System.out.print("--. ");
            break;
            case h:
            System.out.print(".... ");
            break;
            case i:
            System.out.print(".. ");
            break;
            case j:
            System.out.print(".--- ");
            break;
            case k:
            System.out.print("-.- ");
            break;
            case l:
            System.out.print(".-.. ");
            break;
            case m:
            System.out.print("-- ");
            break;
            case n:
            System.out.print("-. ");
            break;
            case o:
            System.out.print("--- ");
            break;
            case p:
            System.out.print(".--. ");
            break;
            case q:
            System.out.print("--.- ");
            break;
            case r:
            System.out.print(".-. ");
            break;
            case s:
            System.out.print("... ");
            break;
            case t:
            System.out.print("- ");
            break;
            case u:
            System.out.print("..- ");
            break;
            case v:
            System.out.print("...- ");
            break;
            case w:
            System.out.print(".-- ");
            break;
            case x:
            System.out.print("-..- ");
            break;
            case y:
            System.out.print("-.-- ");
            break;
            case z:
            System.out.print("--.. ");
            break;
            case 0:
            System.out.print("----- ");
            break;
            case 1:
            System.out.print(".---- ");
            break;
            case 2:
            System.out.print("..--- ");
            break;
            case 3:
            System.out.print("...-- ");
            break;
            case 4:
            System.out.print("....- ");
            break;
            case 5:
            System.out.print("..... ");
            break;
            case 6:
            System.out.print("-.... ");
            break;
            case 7:
            System.out.print("--... ");
            break;
            case 8:
            System.out.print("---.. ");
            break;
            case 9:
            System.out.print("----. ");
            break;
            case .:
            System.out.print(".-.-.- ");
            break;
            case ,:
            System.out.print("--..-- ");
            break;
            case ?:
            System.out.print("..--.. ");
            break;
            default:
        }
    }
}

I have got different compiler complains when I checked my code with Bluej and Eclipse. I got a lot more complains from Eclipse. Why?
The first compiler error I got from Bluej is about this code

char c = input1.charAt(i);

the complain is: .'class' expected
Why I need a class here? I have declared the class at the very beginning.


Another complain which comes from Eclipse

String input = s.nextString(); 

The complain I got is: the method nextString() is undefined for the type Scanner
Why we can use nextInt() but not nextString()? besides int, is there any other type I can use with the Scanner type? and if I want to use the nextString() method here, what should I do?
Thank you very much!