Equals Signature / Constructors And Arguments

In Java code, write class called Student with the following features:

• a private instance variable int studentNumber that is initialized to zero.
• a private instance variable String firstName;
• a private instance variable String lastName;
• a constructor which takes an integer argument and two String arguments to initializes the three respective data items.
• a public method with signature equals(Student s) . . .

So far this is my code :

public class student {
private int studentnumber = 0;
public student () {
firstname= "forename":
lastname="surname":
public student (integer studentnumber, string firstname, string lastname) {
this.firstname= firstname
this.lastname= lastname:

My question is how do i add the integer in the argument do i have to use int =? and how would i go about doing the public signature equals...