call second constructor?

[N. Gonzalez]

My program currently does not increment for each new student object created although this was defined in a larger constructor in the Student class (that calls upon a smaller constructor that generates a student id that should increment for each new student).

I'm uncertain of how to go about accomplishing this.
Should I be creating a whole set of Student objects again, now using the second constructor, because the contstructor I called for the Student object array didn't take the student id as an input parameter?

I barely understand what I'm doing and I've been at this all day...any hints or guidance is appreciated.

public class StudentTest {
 
public static void main (String[] args) {
 
String course = Student.getCourse ();
String coursenumber = Student.getClassNum ();
String instructor = Student.getInstructor ();
System.out.println ("");
System.out.println(" Course: " + course + "\t Course Number: " + coursenumber + "\n Instructor: " + instructor + "\n");
 
Student [] studentarray = new Student [6];
studentarray [0] = new Student ("Mary","Smith","111 Smith Street","New York","NY",10001,"[e-mail]","212-555-1111",true);
studentarray [1] = new Student ("Bill","Brown","222 Brown street","New York","NY",10002,"[e-mail]","212-555-2222",true);
studentarray [2] = new Student ("Jill","Jones","333 Jones Street","New York","NY",10003,"[e-mail]","212-555-3333",true);
studentarray [3] = new Student ("John","Martin","444 Martin Street","New York","NY",10004,"[e-mail]","212-555-4444",true);
studentarray [4] = new Student ("Bob","Wilson","555 Wilson Street","New York","NY",10005,"[e-mail]","212-555-5555",true);
studentarray [5] = new Student ("Betty","Boop","666 Boop Street","New York","NY",10006,"[e-mail]","212-555-6666",false);
 

System.out.println(" Full Class Roster:" + "\n");

for (int i=0; i<studentarray.length; i++){
System.out.println(studentarray[i].toString() + "\n");
}

int enrolled = Student.getEnrollment ();
System.out.println("\n Number of students enrolled before prerequisite check: " + enrolled + "\n");
 

}
}

 
//make all data private
class Student{
 
/** 
 * create static class variables
 */
private static String classNumber = "P10.1234.01";
private static String className = "Advanced Topics in Poetry";
private static StringinstructorName = "Prof. Walt Whitman";
private static intenrollCount = 0;
 
/**
 * create instance variables
 */

private Stringfirstname, lastname, streetaddress, city, state, emailaddress, telephone;
private intstudentid, zipcode;
private booleanprereq = true;

/**
 * Create a constructor for the class that takes student firstname and lastname;  
 * Constructor should generate a student id (start with 1000 and increment for each new student) 
 */
Student (String first, String last) {
firstname = first;
lastname = last;

studentid = 1000;
studentid +=1;
 
enrollCount++;
}

/**
 * Create second constructor that takes all fields (firstname, lastname, address, city, etc.);  
 * Constructor should not take student id as an input parameter;
 * It should use the first constructor to initialize firstname and lastname
 */
Student (String first, String last, String street, String cty, String st, int zip, String email, String phone, boolean pre) {

this (first, last);

streetaddress = street;
city = cty;
state = st;
zipcode = zip;
emailaddress = email;
telephone = phone;
prereq = pre;
}

 /**
 * create getter (and setter?) methods for each class variable
 */
static String getClassNum () {
return (classNumber);
}
static String getCourse () {
return (className);
}
static String getInstructor () {
return (instructorName);
}
static int getEnrollment () {
return (enrollCount);
}

 
/**
 * create getter and setter method for each instance variable
 */
int getStudentID () {//accessors for student ID number field
return (studentid);
}
void setStudentID (int studentid) {
this.studentid = studentid;
}

String getFirstName () {//accessors for first name field
return (firstname);
}
void  setFirstName (String firstname) {
this.firstname = firstname;
}
 
String getLastName () {//accessors for last name field
return (lastname);
}
void  setLastName (String lastname) {
this.lastname = lastname;
}
 
String getStreetAddress () {//accessors for street address field
return (streetaddress);
}
void  setStreetAddress (String streetaddress) {
this.streetaddress = streetaddress;
}
 
String getCity () {//accessors for city field
return (city);
}
void  setCity (String city) {
this.city = city;
}
 
String getState () {//accessors for state field
return (state);
}
void  setState (String state) {
this.state = state;
}
 
int getZipCode () {//accessors for zipcode field
return (zipcode);
}
void  setZipCode (int zipcode) {
this.zipcode = zipcode;
}
 
String getEmail () {//accessors for email field
return (emailaddress);
}
void  setEmail (String emailaddress) {
this.emailaddress = emailaddress;
}
 
String getTelephone () {//accessors for telephone field
return (telephone);
}
void  setTelephone (String telephone) {
this.telephone = telephone;
}
 
boolean getPreReq () {//accessors for prerequisite field
return (prereq);
}
void  setPreReq (boolean prereq) {
this.prereq = prereq;
}

/**
 * My own method
 */
public void prereqCheck () {
System.out.println ("Student has completed prerequisite course: Introduction to Poetry");
}

/**
 * Create a toString( ) string method for the class; it should output all data.
 */
public String toString () {
String studentprofile = "\t Student Name: " +  firstname + " " + lastname +
"\n \t Student ID Number: " + studentid +
"\n \t Address 1: " + streetaddress + 
"\n \t Address 2: " + city + ", " + state + " " + zipcode +
"\n \t Email Address: " + emailaddress + 
"\n \t Telephone: " + telephone;
return (studentprofile);
}

}

[N. Gonzalez]

I also tried this and it didn't work...

 
 for (int i=0; i<studentarray.length; i++){
int id = studentarray[i].getStudentID();
id++;
System.out.println(studentarray[i].toString() + "\n");
}

Need some direction, please...

[Jeanne Boyarsky]

studentid = 1000;
studentid +=1;

These two lines are giving you the problem. For each object, you set the id to 1000 and then increment it by one. But since this happens for each student, you never get anywhere with the incrementing.

You really want this to be two variables. One to keep track of the current maximum assigned student id and one to keep track of the student id for that particular student. Tip: Think about which one of these needs to be static.

[N. Gonzalez]

So are you saying one will be a static class variable and one and instance variable?

I guess I'm confused with the instructions that the constructor should generate the student id.