Creating Class That Throws Errors

I created a class Person:

Java Code:

public class Person {
protected static int MAX_AGE = 150;
protected static int MIN_AGE = 0;
private static final String VALID_WORD_REGEXP = "[a-zA-Z]{3,30}";
private String firstName;
private String lastName;

[Code] ....

I'm trying to learn right way how to throw exceptions. I

Besides that I have couple questions:

I can't quite understand throws statement. I'm thinking throws statement is for passing exceptions one level higher(with are not cought in this caller function). So that would mean I need to put throws in this function only:

Java Code: Person(String firstName, String lastName, int age) mh_sh_highlight_all('java');

Am I right or wrong and is there any other use for it? If so that would mean when

Java Code: Person person = new Person(.....) mh_sh_highlight_all('java');

must be in try tags. How can I avoid it?