"Serializable cannot be resolved to a type"

Question

I'm using Eclipse to create a simple project. I'm trying to implement Serializable in my Java class, but Eclipse is not recognizing it saying "Serializable cannot be resolved to a type" and offering me to create an inteface called Serializable.

public class Location implements Serializable {

Isn't Serializable supposed to be a built in interface? How do I get it to work?

There is no "built in interface" but there are automatic imports (`java.lang`). `Serializable` is in `java.io`, which is _not_ among the automatic imports? See answer from @Reimeus — fge, Jan 03 '13 at 02:32

score 7 · Answer 1 · answered Jan 03 '13 at 02:26

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You need to import it from the java.io package:

import java.io.Serializable;

answered Jan 03 '13 at 02:26

Reimeus

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So the other user who deleted his answer maybe was right. I suggest him/her to undelete. – gd1 Jan 03 '13 at 02:42
Strange....`java.io` is one of the core packages in Java, i.e. it's not an external library. – Reimeus Jan 03 '13 at 02:43
@gd1, I undeleted my answer. – user1329572 Jan 03 '13 at 02:43
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@Imray can you restart Eclipse and see if it makes any difference? Failing that I'd say to install the latest JDK and install for Eclipse. – Reimeus Jan 03 '13 at 02:46
@Imray After adding the import statement, what is the exact error you receive? – arshajii Jan 03 '13 at 02:46
I was looking at my library, and I noticed that my it says "[unbound]" next to it. Could that have something to do with it? – CodyBugstein Jan 03 '13 at 02:54
Your JDK might be ok, in which case you can simply re-install it in Eclipse - [Instructions](http://stackoverflow.com/questions/3542051/eclipse-frustration-with-java-1-7-unbound-library). Otherwise I'd go for a new download. – Reimeus Jan 03 '13 at 02:57

score 3 · Answer 2 · answered Jan 03 '13 at 02:26

3

You have to import java.io.Serializable.

If you click the "error icon" in Eclipse, at the left of the offending line, Eclipse can do it for you. Or just press Ctrl+Shift+O.

answered Jan 03 '13 at 02:26

gd1

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Would you paste the whole class? – gd1 Jan 03 '13 at 02:39
So far it's just that one line – CodyBugstein Jan 03 '13 at 02:41
@MouseEvent I know, but Eclipse is highlight the "java.io" part and telling me it can't resolve it to a type. – CodyBugstein Jan 04 '13 at 05:40

score 1 · Answer 3 · answered Jan 03 '13 at 02:25

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Yes, Serializable is an interface. Perhaps you've failed to configure your build path correctly?

answered Jan 03 '13 at 02:25

user1329572

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For an invalid CP there would likely be many more problems O.o – Jan 03 '13 at 02:27
@pst, "*it saying "Serializable cannot be resolved to a type" and offering me to create an inteface called Serializable*"..you would think OP would recognize that Eclipse would give you the option to import the interface as well.. – user1329572 Jan 03 '13 at 02:28
You're very trusting of posters :-) – Jan 03 '13 at 02:29
@pst, Yeah..I'll remove my answer. – user1329572 Jan 03 '13 at 02:30
No, don't do that. It's not inherently wrong - I up-voted it - and I don't see why this couldn't be the problem, even if I suspect otherwise. – Jan 03 '13 at 05:14
Yes I believe that is it. For some reason when I go to Properties and look at my build path, it says "[unbounded]". – CodyBugstein Jan 04 '13 at 05:41

score 0 · Answer 4 · answered Oct 13 '14 at 10:38

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you have just to right click on your project => buildpath => jre => and you specify the right jre and it will gives you the possibility of importing java.io.Serialisable;

answered Oct 13 '14 at 10:38

Sorinzo

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"Serializable cannot be resolved to a type"

4 Answers4