Question

How to initialize char array with random characters in Java

Answer 1

import java.util.Random;

public class CharArrayRandomizer {
    private static final int SIZE = 10;
    
    private static void initializeCharArrayWithRandomCharacters(char[] arr) {
        String characters = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
        
        Random random = new Random();
        
        for (int i = 0; i < arr.length; i++) {
            arr[i] = characters.charAt(random.nextInt(characters.length()));
        }
    }

    public static void main(String[] args) {
        char[] arr = new char[SIZE];
        
        initializeCharArrayWithRandomCharacters(arr);
        
        for (char ch : arr) {
            System.out.print(ch + " ");
        }
    }
}

 
 
/*
run:
 
F x P V D U g O 9 K 
 
*/

 

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