www.pudn.com > SRS.rar > Course.java

// Course.java - Chapter 16 version. 
 
// Copyright 2000 by Jacquie Barker - all rights reserved. 
 
// A MODEL class. 
 
 
import java.util.*; 
 
public class Course { 
	//------------ 
	// Attributes. 
	//------------ 
 
	private String courseNo; 
	private String courseName; 
	private double credits; 
	private Vector offeredAsSection; // of Section object references 
	private Vector prerequisites; // of Course object references 
	 
	//---------------- 
	// Constructor(s). 
	//---------------- 
 
	public Course(String cNo, String cName, double credits) { 
		setCourseNo(cNo); 
		setCourseName(cName); 
		setCredits(credits); 
 
		// Note that we must instantiate empty vectors. 
 
		offeredAsSection = new Vector(); 
		prerequisites = new Vector(); 
	} 
 
	//----------------- 
	// Get/set methods. 
	//----------------- 
 
	public void setCourseNo(String cNo) { 
		courseNo = cNo; 
	} 
	 
	public String getCourseNo() { 
		return courseNo; 
	} 
	 
	public void setCourseName(String cName) { 
		courseName = cName; 
	} 
	 
	public String getCourseName() { 
		return courseName; 
	} 
	 
	public void setCredits(double c) { 
		credits = c; 
	} 
	 
	public double getCredits() { 
		return credits; 
	} 
	 
	//----------------------------- 
	// Miscellaneous other methods. 
	//----------------------------- 
 
	// Used for testing purposes. 
 
	public void display() { 
		System.out.println("Course Information:"); 
		System.out.println("\tCourse No.:  " + getCourseNo()); 
		System.out.println("\tCourse Name:  " + getCourseName()); 
		System.out.println("\tCredits:  " + getCredits()); 
		System.out.println("\tPrerequisite Courses:"); 
 
		// We take advantage of another of the Course class's 
		// methods in stepping through all of the prerequisites. 
 
		if (hasPrerequisites()) { 
			Enumeration e = getPrerequisites(); 
			while (e.hasMoreElements()) { 
				Course c = (Course) e.nextElement(); 
				System.out.println("\t\t" + c.toString()); 
			} 
		} 
		else System.out.println("\t\t(none)"); 
 
		// Note use of print vs. println in next line of code. 
 
		System.out.print("\tOffered As Section(s):  "); 
		for (int i = 0; i < offeredAsSection.size(); i++) { 
			Section s = (Section) offeredAsSection.elementAt(i); 
			System.out.print(s.getSectionNo() + " "); 
		} 
 
		// Print a blank line. 
		System.out.println(""); 
	} 
	 
	public String toString() { 
		return getCourseNo() + ":  " + getCourseName(); 
	} 
 
	public void addPrerequisite(Course c) { 
		prerequisites.add(c); 
	} 
 
	public boolean hasPrerequisites() { 
		if (prerequisites.size() > 0) return true; 
		else return false; 
	} 
 
	public Enumeration getPrerequisites() { 
		return prerequisites.elements(); 
	} 
 
	public Section scheduleSection(int secNo, char day, String time,  
				       String room, int capacity) { 
		// Create a new Section (note that we're now assigning 
		// the section number by passing it in). 
		Section s = new Section(secNo, day, time, this, room, capacity); 
		 
		// ... and then remember it! 
		offeredAsSection.addElement(s); 
		 
		return s; 
	} 
}