Validate name, last names, phone number and email on Android

public class Validator { /** * returns true if param is email * * @param email * @return */ public boolean isEmailValid(CharSequence email) { return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches(); } /** * Returns true if string only contains alphabetical chars and whitespaces, ideal for * validating names and last names * * @param name * @return */ public boolean isAlpha(String name) { return name.matches("[a-zA-Z|\\s]+"); } /** * If the string contains at least 7 digits, ideal for validating phone numbers * * @param phone * @return */ public boolean isPhoneNumber(String phone) { int count = 0; for (int i = 0; i < phone.length(); i++) { char c = phone.charAt(i); if (Character.isDigit(c)) { count++; } } if (count >= 7) { return true; } else { return false; } } }