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Java - generate random char array of size 10

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Created by:

Payne

654

1. Generate random char array of size 10 with Random

Edit

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public static char[] randomCharArray(int len) {
    String alphabet =
            "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
            "abcdefghijklmnopqrstuvwxyz" +
            "0123456789";
​
    StringBuilder b = new StringBuilder();
​
    for (int i = 0; i < len; i++) {
        int randIdx = new Random().nextInt(alphabet.length());
        char randChar = alphabet.charAt(randIdx);
        b.append(randChar);
    }
​
    return b.toString().toCharArray();
}

Example:

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// [v, K, 5, f, H, R, k, j, O, K]
System.out.println(Arrays.toString(randomCharArray(10)));
​
// [h, U, x, V, u, P, C, c, 1, I]
System.out.println(Arrays.toString(randomCharArray(10)));
​
// [F, Z, p, i, 0, d, O, X, a, B]
System.out.println(Arrays.toString(randomCharArray(10)));