How to generate the random string or random password using Salesforce Apex?

Hi,

Adding some code snippet

Here is a static method that accepts a desired string length as an argument. It takes a full string of ASCII numbers and letters and loops through the index of your desired string length, randomly choosing an index in the full character string.

public static String generateRandomString(Integer len) {
final String chars = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz’;
String randStr = ”;
while (randStr.length() < len) {
Integer idx = Math.mod(Math.abs(Crypto.getRandomInteger()), chars.length());
randStr += chars.substring(idx, idx+1);
}
return randStr;
}

Thanks