使用java设计一个MyMedia(String mediaName, float price, String press, String artist)类，其中包含MyBook(String bookISBN,String editor)、MyCd(String cdISRC)及MyTape(String tapeISRC)三个子类。按照类的设计模式，完成他们的插入、删除、查找以及查找全部的功能。MyMedia类中有并且还拥有一个interfaceMedias接口和一个MediaTest测试类,interfaceMedias接口的方法有public int addMedia(Vector medias,MyMedia tempMedia); public int deleteMedia(Vector medias); public MyMedia findMedia(Vector medias,String artist); public void printlnMedia(Vector medias); public String input(); 并且MediaTest测试类实现了interfaceMedias接口

好的，我理解了你的问题。你需要我帮你设计一个MyMedia类，包含三个子类MyBook、MyCd和MyTape，并且还需要一个interfaceMedias接口和一个MediaTest测试类，实现插入、删除、查找和查找全部的功能。

首先，我们可以定义一个MyMedia类，其中包含媒体名称、价格、出版社和艺术家等属性。代码如下：

public class MyMedia {
    private String mediaName;
    private float price;
    private String press;
    private String artist;

    public MyMedia(String mediaName, float price, String press, String artist) {
        this.mediaName = mediaName;
        this.price = price;
        this.press = press;
        this.artist = artist;
    }

    public String getMediaName() {
        return mediaName;
    }

    public void setMediaName(String mediaName) {
        this.mediaName = mediaName;
    }

    public float getPrice() {
        return price;
    }

    public void setPrice(float price) {
        this.price = price;
    }

    public String getPress() {
        return press;
    }

    public void setPress(String press) {
        this.press = press;
    }

    public String getArtist() {
        return artist;
    }

    public void setArtist(String artist) {
        this.artist = artist;
    }
}

然后，我们可以定义三个子类MyBook、MyCd和MyTape，分别继承自MyMedia类，并增加自己的属性。代码如下：

public class MyBook extends MyMedia {
    private String bookISBN;
    private String editor;

    public MyBook(String mediaName, float price, String press, String artist, String bookISBN, String editor) {
        super(mediaName, price, press, artist);
        this.bookISBN = bookISBN;
        this.editor = editor;
    }

    public String getBookISBN() {
        return bookISBN;
    }

    public void setBookISBN(String bookISBN) {
        this.bookISBN = bookISBN;
    }

    public String getEditor() {
        return editor;
    }

    public void setEditor(String editor) {
        this.editor = editor;
    }
}

public class MyCd extends MyMedia {
    private String cdISRC;

    public MyCd(String mediaName, float price, String press, String artist, String cdISRC) {
        super(mediaName, price, press, artist);
        this.cdISRC = cdISRC;
    }

    public String getCdISRC() {
        return cdISRC;
    }

    public void setCdISRC(String cdISRC) {
        this.cdISRC = cdISRC;
    }
}

public class MyTape extends MyMedia {
    private String tapeISRC;

    public MyTape(String mediaName, float price, String press, String artist, String tapeISRC) {
        super(mediaName, price, press, artist);
        this.tapeISRC = tapeISRC;
    }

    public String getTapeISRC() {
        return tapeISRC;
    }

    public void setTapeISRC(String tapeISRC) {
        this.tapeISRC = tapeISRC;
    }
}

接着，我们定义一个interfaceMedias接口，并在其中添加插入、删除、查找和查找全部的方法。代码如下：

import java.util.Vector;

public interface interfaceMedias {
    public int addMedia(Vector medias, MyMedia tempMedia);
    public int deleteMedia(Vector medias);
    public MyMedia findMedia(Vector medias, String artist);
    public void printlnMedia(Vector medias);
    public String input();
}

最后，我们定义一个MediaTest测试类，实现interfaceMedias接口，并在其中实现插入、删除、查找和查找全部的功能。代码如下：

import java.util.*;

public class MediaTest implements interfaceMedias {
    public int addMedia(Vector medias, MyMedia tempMedia) {
        medias.add(tempMedia);
        return 1;
    }

    public int deleteMedia(Vector medias) {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入要删除的媒体名称：");
        String mediaName = scan.nextLine();
        for (int i = 0; i < medias.size(); i++) {
            MyMedia media = (MyMedia) medias.get(i);
            if (media.getMediaName().equals(mediaName)) {
                medias.remove(i);
                return 1;
            }
        }
        return 0;
    }

    public MyMedia findMedia(Vector medias, String artist) {
        for (int i = 0; i < medias.size(); i++) {
            MyMedia media = (MyMedia) medias.get(i);
            if (media.getArtist().equals(artist)) {
                return media;
            }
        }
        return null;
    }

    public void printlnMedia(Vector medias) {
        for (int i = 0; i < medias.size(); i++) {
            MyMedia media = (MyMedia) medias.get(i);
            System.out.println("媒体名称：" + media.getMediaName() + "，价格：" + media.getPrice() + "，出版社：" + media.getPress() + "，艺术家：" + media.getArtist());
        }
    }

    public String input() {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入媒体名称：");
        String mediaName = scan.nextLine();
        System.out.println("请输入价格：");
        float price = scan.nextFloat();
        scan.nextLine();
        System.out.println("请输入出版社：");
        String press = scan.nextLine();
        System.out.println("请输入艺术家：");
        String artist = scan.nextLine();
        return mediaName + "," + price + "," + press + "," + artist;
    }

    public static void main(String[] args) {
        Vector medias = new Vector();
        MediaTest test = new MediaTest();
        int choice;
        while (true) {
            System.out.println("请选择要进行的操作：");
            System.out.println("1、插入媒体");
            System.out.println("2、删除媒体");
            System.out.println("3、查找媒体");
            System.out.println("4、查找全部媒体");
            System.out.println("5、退出");
            Scanner scan = new Scanner(System.in);
            choice = scan.nextInt();
            scan.nextLine();
            if (choice == 1) {
                String inputStr = test.input();
                String[] temp = inputStr.split(",");
                MyMedia tempMedia = new MyMedia(temp[0], Float.parseFloat(temp[1]), temp[2], temp[3]);
                test.addMedia(medias, tempMedia);
            } else if (choice == 2) {
                test.deleteMedia(medias);
            } else if (choice == 3) {
                System.out.println("请输入要查找的艺术家：");
                String artist = scan.nextLine();
                MyMedia media = test.findMedia(medias, artist);
                if (media == null) {
                    System.out.println("未找到该艺术家的媒体！");
                } else {
                    System.out.println("已找到该艺术家的媒体，媒体名称：" + media.getMediaName() + "，价格：" + media.getPrice() + "，出版社：" + media.getPress() + "，艺术家：" + media.getArtist());
                }
            } else if (choice == 4) {
                test.printlnMedia(medias);
            } else if (choice == 5) {
                break;
            } else {
                System.out.println("输入错误，请重新输入！");
            }
        }
    }
}

以上就是完整的代码实现。你可以根据自己的需要进行调整和修改。