Enter a sentence or phrase

// **********************************************************
//   length.java
//
//   This program reads in strings (phrases) and counts the
//   number of blank characters and certain other letters
//   in the phrase.
// **********************************************************
 
import java.util.Scanner;
 
public class Length
{
  public static void main (String[] args)
  {
      String phrase;    // a string of characters
      int countBlank;   // the number of blanks (spaces) in the phrase
      int length;       // the length of the phrase
      int countA = 0; // the number of a's in the phrase
      int countE = 0; // the number of e's in the phrase
      int countS = 0; // the number of s's in the phrase
      int countT = 0; // the number of t's in the phrase
      char ch;          // an individual character in the string
 
	Scanner scan = new Scanner(System.in);
 
      // Print a program header
      System.out.println ();
      System.out.println ("Character Counter");
      System.out.println ();
 
      // Read in a string and find its length
      System.out.print ("Enter a sentence or phrase: ");
      //System.out.print ("Enter a sentence, phrase, or 'quit' to exit program: ");
      phrase = scan.nextLine();
      length = phrase.length();
 
      // Initialize counts
      countBlank = 0;
 
      // a for loop to go through the string character by character
      // and count the blank spaces
 
      for(int i = 0; i < phrase.length(); i++)
    {
    ch = phrase.charAt(i);
 
    switch (ch)
    {
    case ' ': countBlank++;
    break;
    case 'a':
    case 'A': countA++;
    break;
    case 'e':
    case 'E': countE++;
    break;
    case 's':
    case 'S': countS++;
    break;
    case 't':
    case 'T': countT++;
    break;
    }
      }
      // Print the results 
      System.out.println ();
      System.out.println ("Number of blank spaces: " + countBlank);
      System.out.println ("Number of A's: " + countA);
      System.out.println ("Number of E's: " + countE);
      System.out.println ("Number of S's: " + countS);
      System.out.println ("Number of T's: " + countT);
      System.out.println ();
    }
}

length = phrase.length();

length = phrase.length();

        ...
        String phrase; // a string of characters
        ...
        // Read in a string and find its length
        System.out.print ("Enter a sentence or phrase: ");
        ...
        System.out.println ();
    }

        ...
        String phrase = ""; // a string of characters
        ...
        while (!phrase.equals("quit")) {
            // Read in a string and find its length
            System.out.print ("Enter a sentence or phrase: ");
            ...
            System.out.println ();
        }
    }

while (!phrase.equals("quit")) {