Serialization - JAVA

How to Read entire file into character array in Java - File Handling in java

FileReader's read(char []) function allows you to load entire file into the character array.

This program shows how to Read an entire file into character array in Java..

Student.java

public class Student implements Serializable{
 int id;
 String name;
 
 public Student(int id, String name) {
  this.id = id;
  this.name = name;
 }
 
 public Student() {
 }

 public void display(){
  System.out.println("ID: " + id);
  System.out.println("Name: " + name);
 }
}

FileIO.java

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class FileIO{

 public static void main(String[] args) {
  Student student = new Student(1, "Name 1");
  student.display();
  
  System.out.println("Serializing...\n");
  serialize(student);
  
  System.out.println("Deserializing and reading into new object...");
  System.out.println("Student#2 object");
  Student student2 = new Student();
  student2 = deserialize(student2);
  student2.display();
  
 }

 private static Student deserialize(Student student2) {
  ObjectInputStream objectInputStream;
  try {
   objectInputStream = new ObjectInputStream(new FileInputStream("myFile.ser"));
   student2 = (Student) objectInputStream.readObject();
   if (objectInputStream!=null)
    objectInputStream.close();
  } catch (ClassNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
  return student2;
 }

 private static void serialize(Student student) {
  //Serialize student information into file.
  ObjectOutputStream objectOutputStream;
  try {
   objectOutputStream = new ObjectOutputStream(new FileOutputStream("myFile.ser"));
   objectOutputStream.writeObject(student);
   if (objectOutputStream!=null)
    objectOutputStream.close();
  } catch (IOException e) {
   e.printStackTrace();
  }
 }

}