public class GenerateRandomId { private static final String CHARACTERS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*()_+-=[]{}|/"; private static final int DEFAULT_LENGTH = 10; public String generateRandomString() { return generateRandomString(DEFAULT_LENGTH); } public String generateRandomString(int length) { StringBuilder sb = new StringBuilder(length); Random rando..