2
Java problem
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I need to generate the following output with a TestProgram.
Lecturer 65374 has 3 students:
Student number 1 has name of Amanda
Student number 2 has name of Patrick
Student number 3 has name of Jay
The Student and Lecturer classes are below.
Meanwhile, here is my attempetd test program:
public class TestProgram_four {
public static void main(String args[])
{
// create an array to hold three student references
Student students[] = new Student[3];
students[0]= new Student (1,"Amanda",65374);
students[1]= new Student (2,"Patrick",65374);
students[2]= new Student (3,"Jay",65374);
// retieve and display attribute values
for (int p=0; p<students.length; p++) {
System.out.println(
"Student number "+
students[p].getNo() +
" has name of " +
students[p].getName()
);
}
}
}
Below are the Lecturer and Student scripts for which I need to create a TestProgram:
But first here is my attempt at the TestProgram. I am getting three error messages saying TestProgram_four.java:15: cannot resolve symbol
symbol : constructor Student (int,java.lang.String,int)
location: class Student
students[0]= new Student (1, "Susan", 65374);
^
There are other two error similar to above for Patrick and Jay
Code: ( java )
import java.util.*;
public class Lecturer // Lecturer class to illustrate 1 to many association with Student
{ // attributes........................................ ........(iii)
private int id;
private String subject;
private Vector students; // implement student association with Vector class
private Lecturer(int anId, String aSubject) // constructor
{ setId(anId);
setSubject(aSubject);
students = new Vector(10); //start with Vector for 10 students
} //.................................................. .....(iv)
public void addStudentToLecturer(Student aStudent) // custom method addStudentToLecturer
{ students.addElement(aStudent); //........................(ii)
aStudent.setLecturer(this); // connect student to lecturer (1..1)
}
public Vector getStudents() // custom method to return vector of students.......(i)
{ return students;}
public void setId(int anId) // set accessor methods
{ id = anId;}
public void setSubject(String aSubject)
{ subject = aSubject;}
public int getId() // get accessor methods
{ return id;}
public String getSubject()
{ return subject;}
public class Student // Student with reference variable and accessors
{ private int no; //attributes
private String name;
private Lecturer lecturer;
public Student(int aNo, String aName, Lecturer aLecturer) //constructor with 2 parameters plus lecturer reference
{ setNo(aNo); //invoke accessors to populate attributes
setName(aName);
setLecturer(aLecturer);
lecturer.addStudentToLecturer(this); //tell lecturer to associate with this student
}
public void setNo(int aNo) //set accessor methods
{ no = aNo;}
public void setName(String aName)
{ name = aName;}
public void setLecturer(Lecturer aLecturer)
{ lecturer = aLecturer;}
public int getNo() //get accessor methods
{ return no;}
public String getName()
{ return name;}
public Lecturer getLecturer()
{ return lecturer;}
}
