import javax.swing.JOptionPane; public class TelephoneDigits { { char letter; String inputMessage; String inputString; String outputMessage; inputMessage = "Program to convert uppercase " + "leteers to their corresponding telephone digits.\n" + "To stop the program enter #.\n" + "ENTER A LETTER: "; inputString = letter = inputString.charAt(0); while (letter != '#') { outputMessage = "The letter you entered is: " + letter + "\n" + "The corresponding telephone digit is: "; if (letter >= 'A' && letter <= 'Z') { switch (letter) { case 'A': case 'B': case 'C': outputMessage = outputMessage + "2"; break; case 'D': case 'E': case 'F': outputMessage = outputMessage + "3"; break; case 'G': case 'H': case 'I': outputMessage = outputMessage + "4"; break; case 'J': case 'K': case 'L': outputMessage = outputMessage + "5"; break; case 'M': case 'N': case 'O': outputMessage = outputMessage + "6"; break; case 'P': case 'Q': case 'R': case 'S': outputMessage = outputMessage + "7"; break; case 'T': case 'U': case 'V': outputMessage = outputMessage + "8"; break; case 'W': case 'X': case 'Y': case 'Z': outputMessage = outputMessage + "9"; } } else outputMessage = outputMessage + "INVALID INPUT"; inputMessage = "Enter another uppercase letter to find its correspondinf" + "telephone digit. \n" + "To stop the program enter #.\n" + "Enter a letter: "; inputString = letter = inputString.charAt(0); } } }
inputMessage = "Program to convert uppercase " + "leteers to their corresponding telephone digits.\n" + "To stop the program enter #.\n" + "ENTER A LETTER: ";