Writing Objects To Files

For a number of reasons, you might need to write an object to a file for future usage. Perhaps your applet needs to keep some sort of “state” and between invocations, it needs to recall a “state” object, or you have a number of different applets that all share data but need a way to do so indirectly without using RMI or CORBA.

A method to accomplish all of the above is to take an object and write it to a file for later retrieval and re-creation.

Here is some sample code that will write an object to a file:

 import java.io.File;import java.io.FileOutputStream;import java.io.ObjectOutputStream;import java.io.IOException;public class WriteObjectToFile  public void writeObject(String filename, Object obj)    File objFile = new File(filename);    try      FileOutputStream fos = new FileOutputStream(objFile);      ObjectOutputStream oos = new ObjectOutputStream(fos);      oos.writeObject(obj);      oos.close();    }    catch (IOException e)      System.out.println();    }  }  public static void main (String args[])    WriteObjectToFile objectWriter = new WriteObjectToFile();    Object localObj = new Object();    String test = "This will appear in the file";    localObj = (object)test;    objectWriter.writeObject("appletFile.obj", localObj);  }}


Using this, you can store the value of any object to a file. As in the example [appletFile.obj], the file will contain the value of [test] object.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

homes in the real estate industry

Exploring the Latest Tech Trends Impacting the Real Estate Industry

The real estate industry is changing thanks to the newest technological advancements. These new developments — from blockchain and AI to virtual reality and 3D printing — are poised to change how we buy and sell homes. Real estate brokers, buyers, sellers, wholesale real estate professionals, fix and flippers, and beyond may

man on floor with data

DevX Quick Guide to Data Ingestion

One of the biggest trends of the 21st century is the massive surge in internet usage. With major innovations such as smart technology, social media, and online shopping sites, the internet has become an essential part of everyday life for a large portion of the population. Due to this internet

payment via phone

7 Ways Technology Has Changed Traditional Payments

In today’s digital world, technology has changed how we make payments. From contactless cards to mobile wallets, it’s now easier to pay for goods and services without carrying cash or using a checkbook. This article will look at seven of the most significant ways technology has transformed traditional payment methods.