module.java

This example shows how to create a second window and also how to read and write from/to a text file

import java.util.*;
/**
 * A class  to represent a module.
 * It contains a module title and a list of studnts on the module
 * It is intended to be used in a GUI example
 * 
 * @author Ian Bradley 
 * @version 10/04/2007
 */
public class Module
{
    private String moduleName;
    private ArrayList<Student> students;

    /**
     * Constructor for objects of class Module
     */
    public Module(String moduleName)
    {
        this. moduleName = moduleName;
        students = new ArrayList<Student>();
    }

    /**
     * getter for module name
     * 
     * @return   the name of the module
     */
    public String getModuleName()
    {
        return moduleName;
    }
    
    /**
     * add a student to the module
     * 
     * @param name the student's name
     * @param id the student's id
     */
    public String addStudent(String name, String id)
    {
        if  (name.equals("")) 
            return "Error - Empty name field\n";
        else
        if (id.equals(""))
           return "Error - Empty id field\n";
        
        students.add( new Student(name,id) );
        return name + " " + id +  " added to module " + moduleName;
    }
    
    /**
     * gets list of students on module
     * 
     * @return   the list of students
     */
    public String getAllStudents()
    {
        if ( students.size() > 0 )
        {
            String allStudents = "";
            for ( Student s : students)
            {
                allStudents = allStudents + s.getName() + "  " + s.getID() + "\n";
            }
            return allStudents;
        }
        return "Empty Module";
    }
    
    public String searchByName(String name)
    {
        for ( Student s : students )
        {
            if ( s.getName().equals(name))
                return name + " is on module " + moduleName + "\n";
        }
        return name + " is NOT on module " + moduleName + "\n";
    }
    
    
    public String deleteFromModule(String name)
    {
        int index = 0;
        for ( Student s : students )
        {
            if ( s.getName().equals(name))
            {
                students.remove(index);
                return name + " removed from  module " + moduleName + "\n";
            }
            index++;
        }
        return name + "  NOT found on module " + moduleName + "\n";
    }
    
    
}