How can we save an object in our program and restore it when the program rerun? For example, suppose that we are playing a computer chess game. We close the game before it finished. When we restart the game, it should resume from where we had left it, instead of from the beginning....
Java provides a mechanism, called object serialization where an object can be represented as a sequence of bytes that includes the object's data as well
There are a few open-source projects that can convert Java objects to JSON. However, most of them require that you place Java annotations in your classes; something that you can not do if you do not have access to the source-code. Most also do not fully support the use of Java Generic...
Java's serialization mechanism verifies version consistency by judging the serialVersionUID of the class. When deserializing, the JVM will compare the serialVersionUID in the byte stream passed with the serialVersionUID of the corresponding local entity class. If they are the same, they are conside...
Always include it as a field, for example: “private static final long serialVersionUID = 7526472295622776147L; ” include this field even in the first version of the class, as a reminder of its importance. Do not change the value of this field in future versions, unless you are knowingly...
It requires a class named Person, which is shown in the following example. C# Copy namespace ExampleApplication { public class Person { public int PersonID { get; set; } public string Name { get; set; } public bool Registered { get; set; } } } Remarks The Deserialize method is eq...
For example, if an application uses ArrayList extensively but never uses an ArrayList subclass, treating ArrayList as final could allow FieldSerializer to save 1-2 bytes per ArrayList field. Closures Kryo can serialize Java 8+ closures that implement java.io.Serializable, with some caveats. ...
importjava.io.*;classPersonimplementsSerializable{privatestaticfinallongserialVersionUID=1L;Stringname;transientintage;publicPerson(Stringname,intage){this.name=name;this.age=age;}}publicclassSerializationExample{publicstaticvoidmain(String[]args){Personperson=newPerson("Alice",30);try{FileOutputStreamfileOu...
For example,java.io.ByteArrayOutputStreamcan be used to receive the bytes ofObjectOutputStream. From it you can get abyte[]of the result which, in turn, can be used withByteArrayInputStreamas input toObjectInput. How can I create anObjectInputStreamfrom anObjectOutputStreamwithout a file in...
package java.io; public class ObjectStreamField implements Comparable { public ObjectStreamField(String fieldName, Class fieldType); public ObjectStreamField(String fieldName, Class fieldType, boolean unshared); public String getName(); public Class getType(); public String getTypeString(); public ...