What Is The Transient Keyword In Java?

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The transient keyword in Java is used to avoid serialization. If any object of a data structure is defined as a transient, then it will not be serialized.

Serialization is the ​process of converting an object into a byte stream.

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In the code below, we have created a Member class object with a transient int id and a simple String name. Since the id is transient,​ it cannot be written in the file, so ​0 is stored instead.

import java.io.Serializable; import java.io.*; class HelloWorld { public static class Member implements Serializable{ transient int id; // This will not serialized. String name; // constructor public Member(int i, String k) { this.id = i; this.name = k; } } public static void main(String args[]) throws Exception { Member temp =new Member( 2, "Clausia");//creating object //writing temp object into file FileOutputStream fread=new FileOutputStream("member.txt"); ObjectOutputStream fout=new ObjectOutputStream(fread); fout.writeObject(temp); fout.flush(); fout.close(); fread.close(); System.out.println("Data successfully saved in a file"); // retrieving the data from file. ObjectInputStream fin=new ObjectInputStream(new FileInputStream("member.txt")); Member membr=(Member)fin.readObject(); System.out.println(membr.id+" "+membr.name+" "); fin.close(); } }Run

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