如何将哈希图和图像保存到同一文件

Question

我想知道如何将HashMap（String，List（Object））保存并加载到文件中。Object类如下所示：

public class FlashCard implements Serializable{
private String question;
private Picture picture;
private ArrayList<String> answers = new ArrayList<>();
private ArrayList<Picture> pictures = new ArrayList<>();

    public FlashCard(){
    }

    // Method should set a list of answers
    public void setAnswers(ArrayList<String> answers){
        this.answers = answers;
    }

    // Method should add an answer to a list of answers
    public void setAnswer(String answer){
    answers.add(answer);
}

    // Method should set a list of answers
    public void setPictures(ArrayList<Picture> pictures){
        this.pictures = pictures;
    }

     // Method should add an answer to a list of answers
public void setPicture(Picture picture){
    pictures.add(picture);
}


public void setQuestion(String question){
    this.question = question;
}

public ArrayList<String> getAnswers(){
    return answers;
}

public ArrayList<Picture> getPictures(){
    return pictures;
}

public String getQuestion(){
    return question;
}
}

图片类从任何图片格式转换为BufferedImage图像。我了解到BufferedImage类不可序列化。 这是否意味着我无法将它们都保存到同一文件中？

Answer 1

您应该能够扩展BufferedImage并使该类实现Serializable 。 像这样：

public class SerializableImage extends BufferedImage implements Serializable{
...
}

然后使用SerializableImage代替BufferedImage ，您应该一切顺利！