course.java

国外的数据结构与算法分析用书

package Entities;

import dslib.list.LinkedListUos;

/**	This class models a course, that is a description
	a possible class you could take at the university */
public class Course
{
	protected String description;
	
	protected int number;

	public CourseSection sections[];
	
	protected int creditUnits;
	
	public int creditUnits()
	{
		return creditUnits;
	}
	
	public int number()
	{
		return number;
	}
	
	public String description()
	{
		return description;
	}
	
	/**	Create a new course from a course number and the
		credit units associated with that course */
	public Course(int num, int cUnits, String desp)
	{
		number = num;
		creditUnits = cUnits;
		description = desp;
		sections = new CourseSection[10];
	}


	/**	Set the description of the course to be 'newDescription' */
	public void changeDescription(String newDescription)
	{
		description = newDescription;
	}

	/**	Add a new section for this course */
	public void addSection(CourseSection newSection)
	{
		sections[newSection.secNumber()] = newSection;
	}

	/**	Return the course section 'num' if it exists */
	public CourseSection getCourseSection(int num)
	{
		return sections[num];
	}

	/**	Return a string representation of the sections
		associated with this course that have room for more students */
	public LinkedListUos openSections()
	{
		LinkedListUos result = new LinkedListUos();
		for (int i = 0; i < sections.length; i++)
			if ((sections[i] != null) && (!sections[i].isFull()))
				result.insert(sections[i]);
		return result;
	}
	
 	public String toString()
	{
		String result = "";

		result += "\nCurrent section : ";
		for (int i = 0; i < sections.length; i++)		
			if (sections[i] != null)
				result += sections[i];

		if (result.equals(""))
			result += "\nNo sections yet";
		result += "\nDescription : " + description;	
		result += "\nNumber : " + number;
		result += "Credit Units : " + creditUnits;
		return  result;
	}  
	
} /* end of Course */