我创建客户端和服务器,然后在添加客户端类的序列化的目的,然后简单地刚走到客户在我的硬盘驱动器的文件夹,并将其粘贴到服务器correponding位置,都classname.class和classname.java分别.

它在我自己的笔记本电脑上运行良好但是当我想继续我在其他系统上工作时,当我打开项目文件夹并在客户端尝试连接到服务器后,出现以下错误:

Exception in thread "main" java.io.InvalidClassException: projectname.clasname; local class incompatible: stream classdesc serialVersionUID = -6009442170907349114, local class serialVersionUID = 6529685098267757690
    at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:562)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1582)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1731)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)

到底是怎么回事？是因为我使用较旧版本的IDE运行程序？

编辑

import java.io.Serializable;
import java.net.URL;

public class KeyAdr implements Serializable {
  private static final long serialVersionUID = 6529685098267757690L;

  public URL adr;
  public String key;
}