Why do I get java.io.NotSerializableException [duplicate] The Ask Question Wizard is Live! Data science time! April 2019 and salary with experienceNotSerializableException on saving custom classI keep getting java.io.NotSerializableException: java.io.ObjectOutputStreamWhat is reflection and why is it useful?Does a finally block always get executed in Java?What is a serialVersionUID and why should I use it?How to get an enum value from a string value in Java?Why is subtracting these two times (in 1927) giving a strange result?Why don't Java's +=, -=, *=, /= compound assignment operators require casting?Why is char[] preferred over String for passwords?Why is it faster to process a sorted array than an unsorted array?Can't start Eclipse - Java was started but returned exit code=13Why is printing “B” dramatically slower than printing “#”?
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Why do I get java.io.NotSerializableException [duplicate]
The Ask Question Wizard is Live!
Data science time! April 2019 and salary with experienceNotSerializableException on saving custom classI keep getting java.io.NotSerializableException: java.io.ObjectOutputStreamWhat is reflection and why is it useful?Does a finally block always get executed in Java?What is a serialVersionUID and why should I use it?How to get an enum value from a string value in Java?Why is subtracting these two times (in 1927) giving a strange result?Why don't Java's +=, -=, *=, /= compound assignment operators require casting?Why is char[] preferred over String for passwords?Why is it faster to process a sorted array than an unsorted array?Can't start Eclipse - Java was started but returned exit code=13Why is printing “B” dramatically slower than printing “#”?
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This question already has an answer here:
NotSerializableException on saving custom class
3 answers
I have a program in which I have appointments which are stored inside days which are stored inside weeks. Appointments, days and Weeks are all classes. I try to doout.writeObject(Week1); in my GUI and it compiles but it comes out as not serializable.
I'm sorry if this seems obvious to some of you but I have not serialized before.
java bluej
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
marked as duplicate by Mark Rotteveel java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.
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Mar 9 at 5:21
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
|
This question already has an answer here:
NotSerializableException on saving custom class
3 answers
I have a program in which I have appointments which are stored inside days which are stored inside weeks. Appointments, days and Weeks are all classes. I try to doout.writeObject(Week1); in my GUI and it compiles but it comes out as not serializable.
I'm sorry if this seems obvious to some of you but I have not serialized before.
java bluej
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
marked as duplicate by Mark Rotteveel java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.
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This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
1
put your code and error message
– Jahirul Islam Bhuiyan
Mar 9 at 4:40
ObjectOutputStream.writeObject and NotSerializableException should be sufficient documentation.
– ernest_k
Mar 9 at 4:41
try FileOutputStream fileOut = new FileOutputStream("data.txt"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(Week1); out.close(); fileOut.close(); System.out.println("Serialized data is saved in data.txt"); catch (IOException i) i.printStackTrace(); }
– Juan Navarro
Mar 9 at 4:42
This is inside an actionListener in my GUI
– Juan Navarro
Mar 9 at 4:42
You should carefully consider if you should be usingObjectOutputStreamat all.
– Mark Rotteveel
Mar 9 at 5:24
|
This question already has an answer here:
NotSerializableException on saving custom class
3 answers
I have a program in which I have appointments which are stored inside days which are stored inside weeks. Appointments, days and Weeks are all classes. I try to doout.writeObject(Week1); in my GUI and it compiles but it comes out as not serializable.
I'm sorry if this seems obvious to some of you but I have not serialized before.
java bluej
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
This question already has an answer here:
NotSerializableException on saving custom class
3 answers
I have a program in which I have appointments which are stored inside days which are stored inside weeks. Appointments, days and Weeks are all classes. I try to doout.writeObject(Week1); in my GUI and it compiles but it comes out as not serializable.
I'm sorry if this seems obvious to some of you but I have not serialized before.
This question already has an answer here:
NotSerializableException on saving custom class
3 answers
java bluej
java bluej
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
asked Mar 9 at 4:36
Juan NavarroJuan Navarro
1
1
marked as duplicate by Mark Rotteveel java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.
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marked as duplicate by Mark Rotteveel java
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Mar 9 at 5:21
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
1
put your code and error message
– Jahirul Islam Bhuiyan
Mar 9 at 4:40
ObjectOutputStream.writeObject and NotSerializableException should be sufficient documentation.
– ernest_k
Mar 9 at 4:41
try FileOutputStream fileOut = new FileOutputStream("data.txt"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(Week1); out.close(); fileOut.close(); System.out.println("Serialized data is saved in data.txt"); catch (IOException i) i.printStackTrace(); }
– Juan Navarro
Mar 9 at 4:42
This is inside an actionListener in my GUI
– Juan Navarro
Mar 9 at 4:42
You should carefully consider if you should be usingObjectOutputStreamat all.
– Mark Rotteveel
Mar 9 at 5:24
|
1
put your code and error message
– Jahirul Islam Bhuiyan
Mar 9 at 4:40
ObjectOutputStream.writeObject and NotSerializableException should be sufficient documentation.
– ernest_k
Mar 9 at 4:41
try FileOutputStream fileOut = new FileOutputStream("data.txt"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(Week1); out.close(); fileOut.close(); System.out.println("Serialized data is saved in data.txt"); catch (IOException i) i.printStackTrace(); }
– Juan Navarro
Mar 9 at 4:42
This is inside an actionListener in my GUI
– Juan Navarro
Mar 9 at 4:42
You should carefully consider if you should be usingObjectOutputStreamat all.
– Mark Rotteveel
Mar 9 at 5:24
1
1
put your code and error message
– Jahirul Islam Bhuiyan
Mar 9 at 4:40
put your code and error message
– Jahirul Islam Bhuiyan
Mar 9 at 4:40
ObjectOutputStream.writeObject and NotSerializableException should be sufficient documentation.
– ernest_k
Mar 9 at 4:41
ObjectOutputStream.writeObject and NotSerializableException should be sufficient documentation.
– ernest_k
Mar 9 at 4:41
try FileOutputStream fileOut = new FileOutputStream("data.txt"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(Week1); out.close(); fileOut.close(); System.out.println("Serialized data is saved in data.txt"); catch (IOException i) i.printStackTrace(); }
– Juan Navarro
Mar 9 at 4:42
try FileOutputStream fileOut = new FileOutputStream("data.txt"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(Week1); out.close(); fileOut.close(); System.out.println("Serialized data is saved in data.txt"); catch (IOException i) i.printStackTrace(); }
– Juan Navarro
Mar 9 at 4:42
This is inside an actionListener in my GUI
– Juan Navarro
Mar 9 at 4:42
This is inside an actionListener in my GUI
– Juan Navarro
Mar 9 at 4:42
You should carefully consider if you should be using
ObjectOutputStream at all.– Mark Rotteveel
Mar 9 at 5:24
You should carefully consider if you should be using
ObjectOutputStream at all.– Mark Rotteveel
Mar 9 at 5:24
|
1 Answer
1
active
oldest
votes
You need to put more details such as your code and full stack trace of your error. Nobody knows what is your "out". In this case, I guess it is an ObjectOutputStream.
You need to know when you want to transmit an object through a network, wire, etc ... Your object must follow some kind of standard for it to serialize your data into bytes stream. All the default java.lang object has followed that standard, like String, Integer, Double, etc ... Therefore, when you wanna transmit those data, you don't have to do anything extra.
Because your custom object does not implement the java.io.Serializable interface (the standard I mentioned), it can't be serialized into a bytes stream. So, you may wanna implement that interface or override the toString() method and call out.writeObject(Week1.toString()) I guess.
answered Mar 9 at 5:06
mtumtu
163
ApplyingtoStringwith anObjectOutputStreamis not the right approach, because it will not be possible to obtain the same type of object from theObjectInputStreamagain.
– Mark Rotteveel
Mar 9 at 5:24
@MarkRotteveel I know it's not a good choice. I'm just listing the options.
– mtu
Mar 10 at 3:26
|
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You need to put more details such as your code and full stack trace of your error. Nobody knows what is your "out". In this case, I guess it is an ObjectOutputStream.
You need to know when you want to transmit an object through a network, wire, etc ... Your object must follow some kind of standard for it to serialize your data into bytes stream. All the default java.lang object has followed that standard, like String, Integer, Double, etc ... Therefore, when you wanna transmit those data, you don't have to do anything extra.
Because your custom object does not implement the java.io.Serializable interface (the standard I mentioned), it can't be serialized into a bytes stream. So, you may wanna implement that interface or override the toString() method and call out.writeObject(Week1.toString()) I guess.
answered Mar 9 at 5:06
mtumtu
163
ApplyingtoStringwith anObjectOutputStreamis not the right approach, because it will not be possible to obtain the same type of object from theObjectInputStreamagain.
– Mark Rotteveel
Mar 9 at 5:24
@MarkRotteveel I know it's not a good choice. I'm just listing the options.
– mtu
Mar 10 at 3:26
|
You need to put more details such as your code and full stack trace of your error. Nobody knows what is your "out". In this case, I guess it is an ObjectOutputStream.
You need to know when you want to transmit an object through a network, wire, etc ... Your object must follow some kind of standard for it to serialize your data into bytes stream. All the default java.lang object has followed that standard, like String, Integer, Double, etc ... Therefore, when you wanna transmit those data, you don't have to do anything extra.
Because your custom object does not implement the java.io.Serializable interface (the standard I mentioned), it can't be serialized into a bytes stream. So, you may wanna implement that interface or override the toString() method and call out.writeObject(Week1.toString()) I guess.
answered Mar 9 at 5:06
mtumtu
163
ApplyingtoStringwith anObjectOutputStreamis not the right approach, because it will not be possible to obtain the same type of object from theObjectInputStreamagain.
– Mark Rotteveel
Mar 9 at 5:24
@MarkRotteveel I know it's not a good choice. I'm just listing the options.
– mtu
Mar 10 at 3:26
|
You need to put more details such as your code and full stack trace of your error. Nobody knows what is your "out". In this case, I guess it is an ObjectOutputStream.
You need to know when you want to transmit an object through a network, wire, etc ... Your object must follow some kind of standard for it to serialize your data into bytes stream. All the default java.lang object has followed that standard, like String, Integer, Double, etc ... Therefore, when you wanna transmit those data, you don't have to do anything extra.
Because your custom object does not implement the java.io.Serializable interface (the standard I mentioned), it can't be serialized into a bytes stream. So, you may wanna implement that interface or override the toString() method and call out.writeObject(Week1.toString()) I guess.
answered Mar 9 at 5:06
mtumtu
163
You need to put more details such as your code and full stack trace of your error. Nobody knows what is your "out". In this case, I guess it is an ObjectOutputStream.
You need to know when you want to transmit an object through a network, wire, etc ... Your object must follow some kind of standard for it to serialize your data into bytes stream. All the default java.lang object has followed that standard, like String, Integer, Double, etc ... Therefore, when you wanna transmit those data, you don't have to do anything extra.
Because your custom object does not implement the java.io.Serializable interface (the standard I mentioned), it can't be serialized into a bytes stream. So, you may wanna implement that interface or override the toString() method and call out.writeObject(Week1.toString()) I guess.
answered Mar 9 at 5:06
mtumtu
163
answered Mar 9 at 5:06
mtumtu
163
answered Mar 9 at 5:06
mtumtu
163
answered Mar 9 at 5:06
mtumtu
163
163
ApplyingtoStringwith anObjectOutputStreamis not the right approach, because it will not be possible to obtain the same type of object from theObjectInputStreamagain.
– Mark Rotteveel
Mar 9 at 5:24
@MarkRotteveel I know it's not a good choice. I'm just listing the options.
– mtu
Mar 10 at 3:26
|
ApplyingtoStringwith anObjectOutputStreamis not the right approach, because it will not be possible to obtain the same type of object from theObjectInputStreamagain.
– Mark Rotteveel
Mar 9 at 5:24
@MarkRotteveel I know it's not a good choice. I'm just listing the options.
– mtu
Mar 10 at 3:26
Applying
toString with an ObjectOutputStream is not the right approach, because it will not be possible to obtain the same type of object from the ObjectInputStream again.– Mark Rotteveel
Mar 9 at 5:24
Applying
toString with an ObjectOutputStream is not the right approach, because it will not be possible to obtain the same type of object from the ObjectInputStream again.– Mark Rotteveel
Mar 9 at 5:24
@MarkRotteveel I know it's not a good choice. I'm just listing the options.
– mtu
Mar 10 at 3:26
@MarkRotteveel I know it's not a good choice. I'm just listing the options.
– mtu
Mar 10 at 3:26
|
1
put your code and error message
– Jahirul Islam Bhuiyan
Mar 9 at 4:40
ObjectOutputStream.writeObject and NotSerializableException should be sufficient documentation.
– ernest_k
Mar 9 at 4:41
try FileOutputStream fileOut = new FileOutputStream("data.txt"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(Week1); out.close(); fileOut.close(); System.out.println("Serialized data is saved in data.txt"); catch (IOException i) i.printStackTrace(); }
– Juan Navarro
Mar 9 at 4:42
This is inside an actionListener in my GUI
– Juan Navarro
Mar 9 at 4:42
You should carefully consider if you should be using
ObjectOutputStreamat all.– Mark Rotteveel
Mar 9 at 5:24