Question

How to create an array containing a range of characters in Java

Answer 1

import java.util.Arrays;

public class CharacterRangeArray {
    public static char[] CreateCharacterRangeArray(char startChar, char endChar) {
        if (endChar < startChar) {
            throw new IllegalArgumentException("End character must be greater than or equal to start character.");
        }

        char[] charArray = new char[endChar - startChar + 1];
        for (int i = 0; i <= endChar - startChar; i++) {
            charArray[i] = (char) (startChar + i);
        }
        
        return charArray;
    }

    public static void main(String[] args) {
        // Create an array of lowercase characters
        char[] charArray = CreateCharacterRangeArray('a', 'm');
        System.out.println(Arrays.toString(charArray));

        // Create an array of uppercase characters
        char[] upperCaseArray = CreateCharacterRangeArray('A', 'M');
        System.out.println(Arrays.toString(upperCaseArray));
    }
}



/*
run:

[a, b, c, d, e, f, g, h, i, j, k, l, m]
[A, B, C, D, E, F, G, H, I, J, K, L, M]

*/

 

70+ SQL courses for beginners and professionals