import java.security.SecureRandom;

public class PasswordGenerator {

    final String lowercaseCharacters = "abcdefghjkmnpqrstuvwxyz";
    final String uppercaseCharacters = "ABCDEFGHJKMNPQRSTUVWXYZ";

    int length = 12;

    public int getLength() {
        return length;
    }

    public void setLength(int length) {
        this.length = length;
    }

    public String generateRandomPassword() {
        StringBuilder generatedPassword = new StringBuilder();
        SecureRandom rand = new SecureRandom();
        String characterPool = "";

        characterPool += lowercaseCharacters;
        characterPool += uppercaseCharacters;

        for (int generatorPosition = 0; generatorPosition < getLength(); generatorPosition++) {
            generatedPassword.append(characterPool.charAt(rand.nextInt(characterPool.length())));
        }
        return generatedPassword.toString();
    }
}