Java Code

import java.awt.*;
import javax.swing.*;
public class CourseApplet extends JApplet
{
	Course math, history, cs;
	JList list;
	DefaultListModel model = new DefaultListModel( );
	public void init( )
	{
		math = new Course( "Calculus", 4 );// call constructor method in Course
		history = new Course( "History", 3 );
		cs = new Course( "Java", 4 );
		list = new JList( model );
		model.addElement( math.toString( ) );
		model.addElement( history.toString( ) );
		model.addElement( cs.toString( ) );
		setLayout( new FlowLayout( ) );
		add( list );
	}
}

public class Course
{
   private int numCredits;		// instance variable
   private String title; 		// instance variable		
   public Course( String name, int nCredits )   // constructor
   {
	title = name;
	numCredits = nCredits;
   }
   public String getTitle( ) 		 // getter method
   {
 	return title;   
   } 
   public int getNumCredits( ) 	 // getter method
   {	
	return numCredits;
   }
   public void setTitle( String t ) 	 // setter method
   { 
	title = t;
   }
   public void setNumCredits( int nc)     // setter method
   {	
	numCredits = nc;
   }
   public String toString( ) 	// returnStr is a local variable
   {
      String returnStr =  title;
      returnStr += " ( " + numCredits + " ) ";
      return returnStr;
   }
}