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Java Programming

1 reply on 1 page. Most recent reply: Nov 21, 2002 9:56 PM by Daniel Ray

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Ian Andrew

Posts: 3
Nickname: sunkey
Registered: Nov, 2002

Java Programming

Posted: Nov 15, 2002 7:43 AM

Below is a lab programm to be submitted by Nov. 22, 02:

Write a program that will model a University. Write a class to model a Student, each student has a name and an address. Implement a method called deplayStudent that displays the information of a student in a window. Use the static method showInputDialog in the class JOptionPane, found in the javax.swing package. Each University has a list of Students that that are enrolled. Using an array to model the list of Students, implement a University class that has 50 students enrolled. Add to your university class, a method displayAllStudents that will call the displayStudent method for all the students enrolled.

I HAVE TRIED TO WRITE THE PROGRAM MYSELF BUT GETTING ERRORS
THAT I CANNOT DEBUG. I AM NOT SURE HOW IMPLEMENT THE SOLUTION. I AM THERFORE SEEKING ASSISTANT IN COMPLETING IT IN TIME TO BE HANDED IN.

HERE WHAT I TRIED TO DO:

/* This class models the Student Object. It takes as
input two Strings the name and the address and
constructs a Student Object.
*/

import javax.swing.*;

public class Student
{
String student_name;
String student_address;

public Student(String name, String address)
{
this.student_name = name;
this.student_address = address;
}
public void displayStudent()
{
JOptionPane.showMessageDialog(null, "Name :" +
student_name + "/n" + "Address : " +
student_address);
}

public void AddStudent(Student st)
{
student_list[next_student++];
}

} // End class Student

===========================================================

* Class to model the University */

public class University
{
Student [] student_list = new Student[50];
int next_index = 0 ;

public void displayAllStudents()
{
for (int st_pos = 0; st_pos <
student_list.length; st_pos++)

student_list[st_pos].displayStudent();
}

public static void main(String [] args)
{
String inputname, inputaddress;
int counter = 0;

do
{
TextIO.put("Student Name : ");
inputname = TextIO.getlnString();

TextIO.put("\n\n Student Address : ");
inputaddress = TextIO.getlnString();

student_info[counter] = new Student
(inputname, inputaddress);

displayStudent();

TextIO.put("\n Enter Another Student Y/N ? ");
counter++;

} while ( counter < 50 || TextIO.getlnBoolean() );

TextIO.putln("\n\n\nOKcounter Student'S' were
entered. Goodbye.");

displayAllStudent();

}

}

Daniel Ray

Posts: 53
Nickname: budoray
Registered: Oct, 2002

Re: Java Programming

Posted: Nov 21, 2002 9:56 PM

I may be late helping you here, but this sticks out

public void AddStudent(Student st)
{
student_list[next_student++];
}

You're not adding the student into the array. Try ..

student_list[next_student++] = st;

Ray

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