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Java Tutorial : Java IO (Java Serialization with Transient keyword) |
import java.io.Serializable; public class Employee implements Serializable { private static final long serialVersionUID = 765764534241652904L; private int id; private String name; /* * If we don't want to serialize any data member of a * class, you can mark it as transient. */ private transient int age; public Employee(int id, String name, int age) { super(); this.id = id; this.name = name; this.age = age; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }
import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectOutputStream; public class SerializationDemo { public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException { SerializationDemo serializationDemo = new SerializationDemo(); serializationDemo.writeEmployeeObject(); } private void writeEmployeeObject() throws FileNotFoundException, IOException { FileOutputStream fileOutputStream = null; ObjectOutputStream objectOutputStream = null; try { fileOutputStream = new FileOutputStream("employee.txt"); objectOutputStream = new ObjectOutputStream(fileOutputStream); Employee employee = new Employee(101, "Peter", 32); System.out.println("Id = " + employee.getId()); System.out.println("Name = " + employee.getName()); System.out.println("Age = " + employee.getAge()); /* * Write the specified object to the * ObjectOutputStream. */ objectOutputStream.writeObject(employee); System.out .println("Successfully written employee object to the file.\n"); } finally { if (objectOutputStream != null) { /* * Closing a ObjectOutputStream will also * close the OutputStream instance to which * the ObjectOutputStream is writing. */ objectOutputStream.close(); } } } }
Id = 101 Name = Peter Age = 32 Successfully written employee object to the file.employee.txt
DeSerializationDemo.java
import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.ObjectInputStream; public class DeSerializationDemo { public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException { DeSerializationDemo deSerializationDemo = new DeSerializationDemo(); deSerializationDemo.readEmployeeObject(); } private void readEmployeeObject() throws IOException, FileNotFoundException, ClassNotFoundException { FileInputStream fileInputStream = null; ObjectInputStream objectInputStream = null; try { fileInputStream = new FileInputStream("employee.txt"); objectInputStream = new ObjectInputStream(fileInputStream); /* * Read an object from the ObjectInputStream. */ Employee employee = (Employee) objectInputStream.readObject(); System.out .println("Successfully read employee object from the file."); System.out.println("Id = " + employee.getId()); System.out.println("Name = " + employee.getName()); /* * If you deserialize the object, you will get * the default value for transient variable,So * for age we will get 0 */ System.out.println("Age = " + employee.getAge()); } finally { if (objectInputStream != null) { /* * Closing a ObjectInputStream will also * close the InputStream instance from which * the ObjectInputStream is reading. */ objectInputStream.close(); } } } }
Successfully read employee object from the file. Id = 101 Name = Peter Age = 0Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_Serialization_transient_App.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_Serialization_transient_App
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/9ef303db3f229fc70e7cf47baac5692282611e62/BasicJava/JavaIODemo_Serialization_transient_App/?at=master
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