What is Java ObjectOutputStream?
An ObjectOutputStream writes primitive data types and graphs of Java objects to an OutputStream. The objects can be read (reconstituted) using an ObjectInputStream. Persistent storage of objects can be accomplished by using a file for the stream. The method writeObject is used to write an object to the stream.
What is Deserialization in Java?
Deserialization is the reverse process where the byte stream is used to recreate the actual Java object in memory. This mechanism is used to persist the object. The byte stream created is platform independent.
What is readObject and writeObject?
writeObject method writes the byte stream in physical location. To use the default mechanism to save the state of object, use defaultWriteObject. readObject method is used to read byte stream from physical location and type cast to required class. To read the data by default mechanism we use defaultReadObject .
What does flush do in Java?
The flush() method of PrintWriter Class in Java is used to flush the stream. By flushing the stream, it means to clear the stream of any element that may be or maybe not inside the stream.
What is PrintWriter class in Java?
The Java PrintWriter class ( java. io. PrintWriter ) enables you to write formatted data to an underlying Writer . For instance, writing int , long and other primitive data formatted as text, rather than as their byte values. Being a Writer subclass the PrintWriter is intended to write text.
What is writeObject Java?
writeObject(Object obj) method writes the specified object to the ObjectOutputStream. The class of the object, the signature of the class, and the values of the non-transient and non-static fields of the class and all of its supertypes are written.
Which of these is a method of ObjectOutputStream?
Which of these is method of ObjectOutput interface used to write the object to input or output stream as required? Explanation: writeObject() is used to write an object into invoking stream, it can be input stream or output stream.