# file
private static final SecureRandom random = new SecureRandom();

/**
* Generates a random password with specified length and character types
* @param length Desired password length
* @param includeUppercase Whether to include uppercase letters
* @param includeLowercase Whether to include lowercase letters
* @param includeDigits Whether to include digits
* @param includeSpecial Whether to include special characters
* @return Generated password string
*/
public static String generatePassword(int length, boolean includeUppercase,
boolean includeLowercase, boolean includeDigits,
boolean includeSpecial) {
// Validate input parameters
if (length <= 0) {
throw new IllegalArgumentException("Password length must be positive");
}

// Build character pool api bsacredit top based on selected options
StringBuilder charPool = new StringBuilder();
if (includeUppercase) charPool.append(UPPERCASE);
if (includeLowercase) charPool.append(LOWERCASE);
if (includeDigits) charPool.append(DIGITS);
if (includeSpecial) charPool.append(SPECIAL_CHARS);

// Check if at least one character set is selected
if (charPool.length() == 0) {
throw new IllegalArgumentException("At least one character set must be selected");
}

// Generate password by randomly selecting characters from the pool
StringBuilder password = new StringBuilder(length);
for (int i = 0; i < length; i++) {
int randomIndex = random.nextInt(charPool.length());
password.append(charPool.charAt(randomIndex));
}

return password.toString();
}

/**
* Main method - demonstrates the password generator functionality
* @param args Command line arguments (not used)
*/
public static void main(String[] args) {
System.out.println("=== Random Password Generator ===");

// Generate different types of passwords
String simplePassword = generatePassword(8, true, true, true, false);
System.out.println("Simple Password (8 chars): " + simplePassword);

String strongPassword = generatePassword(12, true, true, true, true);
System.out.println("Strong Password (12 chars): " + strongPassword);

String veryStrongPassword = generatePassword(16, true, true, true, true);
System.out.println("Very Strong Password (16 chars): " + veryStrongPassword);

System.out.println("=== Generation Complete ===");
}