Catalog - Practice Exercises Java

package Catalog;
public class Main
{
	public static void main(String[] args)
	{
		Film[] myFilms = new Film[3];
		Music[] myMusic = new Music[3];
		ComputerProgram[] myComputerProgram = new ComputerProgram[3];
	}
}

public class Item
{
	protected String name;
	protected String code;
	protected String category;
	protected String size;

	public Item()
	{
	}
	public Item(String name, String code, String category, String size)
	{
		this.name = name;
		this.code = code;
		this.category = category;
		this.size = size;
	}

	public final String getName()
	{
		return name;
	}
	public final void setName(String value)
	{
		name = value;
	}
	public final String getCode()
	{
		return code;
	}
	public final void setCode(String value)
	{
		code = value;
	}
	public final String getCategory()
	{
		return category;
	}
	public final void setCategory(String value)
	{
		category = value;
	}
	public final String getSize()
	{
		return size;
	}
	public final void setSize(String value)
	{
		size = value;
	}
}

public class Film extends Item
{
	protected String director;
	protected String mainActor, mainActress;

	public Film()
	{

	}
	public Film(String director, String mainActor, String mainActress)
	{
		this.director = director;
		this.mainActor = mainActor;
		this.mainActress = mainActress;
	}

	public final String getDirector()
	{
		return director;
	}
	public final void setDirector(String value)
	{
		director = value;
	}
	public final String getMainActor()
	{
		return mainActor;
	}
	public final void setMainActor(String value)
	{
		mainActor = value;
	}
	public final String getMainActress()
	{
		return mainActress;
	}
	public final void setMainActress(String value)
	{
		mainActress = value;
	}

	public final void Play()
	{

	}
	public final void RetrieveInformation()
	{

	}
}

public class Music extends Item
{
	protected String singer;
	protected int length;

	public Music()
	{

	}
	public Music(String singer, int length)
	{
		this.singer = singer;
		this.length = length;
	}

	public final String getSinger()
	{
		return singer;
	}
	public final void setSinger(String value)
	{
		singer = value;
	}
	public final int getLenght()
	{
		return length;
	}
	public final void setLenght(int value)
	{
		length = value;
	}

	public final void Play()
	{

	}
	public final void RetrieveInformation()
	{

	}
}
public class ComputerProgram extends Item
{

}