Java：可转换对象和序列化

Question

I need to serialize a Transferable object to I can send it over an object data stream but during runtime I get the error java.io.NotSerializableException & I have no idea whats wrong. How do I fix this?

Here's the part of the code that is causing the error

Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
    Transferable contents = clipboard.getContents(null);
    System.out.println(contents);

    //Initialiaze ObjectStreams
    FileOutputStream fos = new FileOutputStream("t.tmp");
    ObjectOutputStream oos = new ObjectOutputStream(fos);

    //write objects
    oos.writeObject(contents);
    oos.close();

Answer 1

您的具体类必须实现Serializable接口才能执行此操作。

Answer 2

 * Thrown when an instance is required to have a Serializable interface.
 * The serialization runtime or the class of the instance can throw
 * this exception. The argument should be the name of the class.

Hmm. Have you added to your object implements Serializable ?

UPD. Also check that all fields are also serializable. If not - mark them as transient.

Answer 3

It seems that your object have to implements both Transferable and Serializable.

Hope this code helps you

Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
//Initialiaze ObjectStreams
FileOutputStream fos = new FileOutputStream("t.tmp");
ObjectOutputStream oos = new ObjectOutputStream(fos);

clipboard.setContents(new Plop(), null);
final Transferable contents = clipboard.getContents(null);
final Plop transferData = (Plop) contents.getTransferData(new DataFlavor(Plop.class, null));
oos.writeObject(transferData);
oos.close();

with a plop like:

static class Plop implements Transferable, Serializable{

    @Override
    public DataFlavor[] getTransferDataFlavors() {
        return new DataFlavor[0];  //To change body of implemented methods use File | Settings | File Templates.
    }

    @Override
    public boolean isDataFlavorSupported(final DataFlavor flavor) {
        return false;  //To change body of implemented methods use File | Settings | File Templates.
    }

    @Override
    public Object getTransferData(final DataFlavor flavor) throws UnsupportedFlavorException, IOException {
        return this;
    }
}

Answer 4

围绕这个的背心方法是将每个数据风格解析为它的类型的可序列化对象，即将字符串剪贴板内容放入字符串对象