EN
Java - generate random string from letters and digits of size 10
13 points
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public static String randomString(int len) {2
String alphabet =3
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +4
"abcdefghijklmnopqrstuvwxyz" +5
"0123456789";6
7
StringBuilder b = new StringBuilder();8
9
for (int i = 0; i < len; i++) {10
int randIdx = ThreadLocalRandom.current().nextInt(alphabet.length());11
char randChar = alphabet.charAt(randIdx);12
b.append(randChar);13
}14
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return b.toString();16
}Example:
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System.out.println(randomString(10)); // oBmUYZ3MIg2
System.out.println(randomString(10)); // 8gGOjO5Ga23
System.out.println(randomString(10)); // RVrvgA9OkdGenerated random text will contains:
- upper letters: A-Z
- lower case letters: a-z
- digits: 0-9
