How to fill a matrix with uppercase AND lowercase characters

Question

Hello and thank you for reading this. I have written code that fills a 2d triangular array, but it only fills with lower case letters. How do I get it to also fill with uppercase letters?

Here is a small part of the code:

public static void fillSpecialMatrice(char[][] matrice) {
   Random random = new Random();
   for(int i = 0; i < matrice.length; i++) {
      for(int j = 0; j < matrice.length-i; j++) {
         matrice[i][j] = (char) (random.nextInt(26) + 'a');
      }
   }
}

How the triangular matrix looks when printed:

Add 'A', intead of 'a'. I don't really understand your question, do you want a mix of lower-upper case? — vish4071, Mar 02 '22 at 21:19

vish4071 · Answer 1 · 2022-03-02T23:14:27.227

You can randomize upper and lower-cases as well. Something like this:

public static void fillSpecialMatrice(char[][] matrice) {
    Random random = new Random();
        for(int i = 0; i < matrice.length; i++) {
            for(int j = 0; j < matrice.length-i; j++) {
                   case_int = random.nextInt(2);
                   case_char = (case_int == 0 ) ? 'a' : 'A';
                   matrice[i][j] = (char) (random.nextInt(26) + case_char);
     }
    }
  }

How to fill a matrix with uppercase AND lowercase characters

1 Answers1