编写一个简单的Java程序：在一个图书管理程序中，类Book.Newspsper和 Video都是类Media 的子类。编写一个类，该类前够实现对一组书、报纸等的存储，并提供一定的检索功能。

下面是一个简单的Java程序，实现了一个图书管理程序，包含了类Book、Newspaper和Video，它们都是类Media的子类。另外还实现了一个类MediaLibrary，用于存储和检索一组图书、报纸和视频。

public class Media {
    private String title;
    private String author;
    private int year;

    public Media(String title, String author, int year) {
        this.title = title;
        this.author = author;
        this.year = year;
    }

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public int getYear() {
        return year;
    }
}

public class Book extends Media {
    private String publisher;

    public Book(String title, String author, int year, String publisher) {
        super(title, author, year);
        this.publisher = publisher;
    }

    public String getPublisher() {
        return publisher;
    }
}

public class Newspaper extends Media {
    private String editor;

    public Newspaper(String title, String author, int year, String editor) {
        super(title, author, year);
        this.editor = editor;
    }

    public String getEditor() {
        return editor;
    }
}

public class Video extends Media {
    private String director;

    public Video(String title, String author, int year, String director) {
        super(title, author, year);
        this.director = director;
    }

    public String getDirector() {
        return director;
    }
}

import java.util.ArrayList;
import java.util.List;

public class MediaLibrary {
    private List<Media> mediaList;

    public MediaLibrary() {
        mediaList = new ArrayList<>();
    }

    public void addMedia(Media media) {
        mediaList.add(media);
    }

    public List<Media> searchByTitle(String title) {
        List<Media> result = new ArrayList<>();
        for (Media media : mediaList) {
            if (media.getTitle().equals(title)) {
                result.add(media);
            }
        }
        return result;
    }

    public List<Media> searchByAuthor(String author) {
        List<Media> result = new ArrayList<>();
        for (Media media : mediaList) {
            if (media.getAuthor().equals(author)) {
                result.add(media);
            }
        }
        return result;
    }

    public List<Media> searchByYear(int year) {
        List<Media> result = new ArrayList<>();
        for (Media media : mediaList) {
            if (media.getYear() == year) {
                result.add(media);
            }
        }
        return result;
    }
}

使用示例：

MediaLibrary library = new MediaLibrary();

// 添加一些书、报纸和视频
library.addMedia(new Book("Java编程思想", "Bruce Eckel", 2002, "机械工业出版社"));
library.addMedia(new Book("Effective Java", "Joshua Bloch", 2008, "机械工业出版社"));
library.addMedia(new Newspaper("人民日报", "人民日报社", 2020, "张宏伟"));
library.addMedia(new Newspaper("新京报", "新京报社", 2020, "刘畅"));
library.addMedia(new Video("肖申克的救赎", "弗兰克·德拉邦特", 1994, "弗兰克·德拉邦特"));

// 按照标题搜索
List<Media> result1 = library.searchByTitle("Java编程思想");
for (Media media : result1) {
    System.out.println(media.getTitle() + " (" + media.getYear() + ")");
}

// 按照作者搜索
List<Media> result2 = library.searchByAuthor("Joshua Bloch");
for (Media media : result2) {
    System.out.println(media.getTitle() + " (" + media.getYear() + ")");
}

// 按照年份搜索
List<Media> result3 = library.searchByYear(2020);
for (Media media : result3) {
    System.out.println(media.getTitle() + " (" + media.getAuthor() + ")");
}