Java: How to make this Serializable?

Question

I need the following class to be Serializable.

package helpers;

public class XY implements Comparable
{
    public int x;
    public int y;

    p         


        

Answer 1

Please see the SerializationUtils API provided by Apache Commons Lang.

This is much safer and more maintenance friendly. :)

Answer 2

Implementing Serializable will do the trick, but you must write the object with an ObjectOutputStream, not just an OutputStream.

Answer 3

You just need to inherit from java.io.Serializable:

public class XY implements Comparable<XY>, java.io.Serializable

Check more about serialization here.