A good answer might be:

The completed program is given below.

The program has also been improved by accepting input from the user. The program uses the charAt( int index ) method of the String class. This method returns a single character from a string. The first character in a string is at index 0, the next is at index 1, and so on. (Remember: a String is an object, even if it contains only one character. The charAt() method must be used here to get a char that can be used in the switch.)

import java.io.*; class Switcher { public static void main ( String[] args ) throws IOException { String lineIn; char color ; String message = "Color is"; BufferedReader stdin = new BufferedReader ( new InputStreamReader(System.in) ); System.out.println("Enter a color letter:"); lineIn = stdin.readLine(); color = lineIn.charAt( 0 ); // get the first character switch ( color ) { case 'r': case 'R': message = message + " red" ; break; case 'o': case 'O': message = message + " orange" ; break; case 'y': case 'Y': message = message + " yellow" ; break; case 'g': case 'G': message = message + " green" ; break; case 'b': case 'B': message = message + " blue" ; break; case 'v': case 'V': message = message + " violet" ; break; default: message = message + " unknown" ; } System.out.println ( message ) ; } }

QUESTION 11:

What would be wrong if the program were altered to something like:

    switch ( lineIn )
    {
    
      case "red":
      case "Red":
        message = message + " red" ;
        break;

    . . . and so on