How to generate random alphanumeric string of given size in Java
In this section, we will show you how to generate random alphanumeric string of given size in Java. Example 1: Use SecureRandom import java.security.SecureRandom ; public class Main { //Create a String of the characters which can be included in the string private static final String ALPHA_NUMERIC_STRING = "ABCDEFGHIJKLMNOPQRSTUVWXY" + "Zabcdefghijklmnopqrstuvwxyz0123456789" ; // Driver code public static void main ( String [] args) { String randomAlphaNumericString = generateAlphaNumericString ( 25 ); System . out .println( randomAlphaNumericString ); } //Method to generate Random AlphaNumeric String public static String generateAlphaNumericString ( int length) { SecureRandom random = new SecureRandom(); StringBuilder builder = new StringBuilder(length); for ( int i = 0 ; i < length; i ++) { builder .append( ALPHA_NUMERIC_STRING . ...