public class Password {

	public boolean isValid(String password) {
		if(hasLength(password) && hasLetter(password) && hasNumber(password)) {
			return true; 
		}
		return false;
	}
	
	private boolean hasLength(String password) {
		if(password.length() >= 6) {
			return true;
		}
		return false;
	}
	
	private boolean hasLetter(String password) {
		if(password.matches("[a-z]{1,}") && password.matches("[A-Z]{1,}")) {
			return true;
		}
		return false;
	}
	
	private boolean hasNumber(String password) {
		if( password.matches("[0-9]{1,0}")  ) {
			return true;
		}
		return false;
	}
}