import java.util.HashMap; import java.util.Map; import java.util.Scanner; /** * Overwriting Try to do a program in which:
*
* 0- Be commented to explain it.
* 1- Get a message.
* 2 - Convert it vowels to numbers.
* a/A -> 4
* e/E -> 3
* i/I -> 1
* o/O -> 0
* u/U -> 7
* 3- Show original and converted message.
*
* For example:
* message = "This is Sololearn"
* converted = "Th1s 1s S0l0l34rn"
*/ public class Overwriting { /** * Init a map */ private static final Map translateMap; static { translateMap = new HashMap(); translateMap.put('a', '4'); translateMap.put('e', '3'); translateMap.put('i', '1'); translateMap.put('o', '0'); translateMap.put('u', '7'); translateMap.put('A', '4'); translateMap.put('E', '3'); translateMap.put('I', '1'); translateMap.put('O', '0'); translateMap.put('U', '7'); } public static void main(String[] args) { // Get the input text Scanner scanner = new Scanner(System.in); String input = scanner.nextLine(); System.out.print(input + " --> "); scanner.close(); // Make a chars stream and do our job input.chars() .mapToObj(i -> (char)i) .forEach(i -> { if(translateMap.containsKey(i)) { System.out.print(translateMap.get(i)); } else { System.out.print(i); } }); } }

Char stream to string example