PhoneNumberMeme.java

package com.company;

import java.util.Scanner;

/**
 * Created by Simon on 11-12-2015.
 */


public class PhoneKeyPad {

    private static String telefoonnummer = "";

    public static void main(String [] args) {


        Scanner scanner = new Scanner(System.in);
        System.out.println("Voer een string in: ");

        // scannen van een string
        String input = scanner.next();

        // lengte van de string
        int lengte = input.length();


        for (int i = 0; i < lengte; i++) {
            System.out.print(getNumber(Character.toUpperCase(input.charAt(i))));
            }
        }
    
        public static int getNumber(char letter){

            int nummer = 0;
        if(letter == 'A' || letter == 'B' || letter == 'C'){
            nummer = 2;        }
        if(letter == 'D' || letter == 'E' || letter == 'F'){
            nummer = 3;        }
        if(letter == 'G' || letter == 'H' || letter == 'I'){
            nummer =  4;        }
        if(letter == 'J' || letter == 'K' || letter == 'L'){
            nummer =  5;        }
        if(letter == 'M' || letter == 'N' || letter == 'O'){
            nummer =  6;        }
        if(letter == 'P' || letter == 'Q' || letter == 'R' || letter == 'S'){
            nummer =  7;        }
        if(letter == 'T' || letter == 'U' || letter == 'V'){
            nummer =  8;        }
        if(letter == 'W' || letter == 'X' || letter == 'Y' || letter == 'Z'){
            nummer =  9;        }

            return nummer;
        }
}