This document provides an overview of serialization in Java. Serialization allows an object to be written to a stream and reconstructed from that stream later. When an object is serialized, its field values are written to preserve the object's state. The transient keyword can exclude fields from serialization. Serialization uses ObjectOutputStream to write objects and ObjectInputStream to read them back. Unique identifiers prevent version conflicts during deserialization. Classes can implement Externalizable for full control over serialization.
Collections Framework is a unified architecture for managing collections, Main Parts of Collections Framework
1. Interfaces :- Core interfaces defining common functionality exhibited by collections
2. Implementations :- Concrete classes of the core interfaces providing data structures
3. Operations :- Methods that perform various operations on collections
Collections Framework is a unified architecture for managing collections, Main Parts of Collections Framework
1. Interfaces :- Core interfaces defining common functionality exhibited by collections
2. Implementations :- Concrete classes of the core interfaces providing data structures
3. Operations :- Methods that perform various operations on collections
https://www.learntek.org/blog/serialization-in-java/
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
https://www.learntek.org/blog/serialization-in-java/
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
Introduction to java beans, java beans, Core java, j2se, getting started with java beans programming, java to standard edition, beans in java, beans programming in java
Java Multi Threading Concept
By N.V.Raja Sekhar Reddy
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The next release of the Java Standard Edition is scheduled for the beginning of 2010. In this session we'll review the latest feature list of what's in and what's out of the next version of the JDK.
An update on the latest news around JavaFX including the 1.2 release and the general availability of JavaFX Mobile for Windows Mobile devices.
Java is a high level, an object oriented and mostly used programming language. It has several applications as in web development, app development, android development etc. This is a ppt that will give a basic idea about java its uses and its applications.
A summary of core data optimization in iOS app. How to search in the large database having more than 100k records.
Perform a search on different types of tags in core data.
Automated Discovery of Deserialization Gadget ChainsPriyanka Aash
Although vulnerabilities stemming from the deserialization of untrusted data have been understood for many years, unsafe deserialization continues to be a vulnerability class that isn't going away. Attention on Java deserialization vulnerabilities skyrocketed in 2015 when Frohoff and Lawrence published an RCE gadget chain in the Apache Commons library and as recently as last year's Black Hat, Muñoz and Miroshis presented a survey of dangerous JSON deserialization libraries. While much research and automated detection technology has so far focused on the discovery of vulnerable entry points (i.e. code that deserializes untrusted data), finding a "gadget chain" to actually make the vulnerability exploitable has thus far been a largely manual exercise. In this talk, I present a new technique for the automated discovery of deserialization gadget chains in Java, allowing defensive teams to quickly identify the significance of a deserialization vulnerability and allowing penetration testers to quickly develop working exploits. At the conclusion, I will also be releasing a FOSS toolkit which utilizes this methodology and has been used to successfully develop many deserialization exploits in both internal applications and open source projects.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
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Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
2. Topics
● What is Serialization?
● What is preserved when an object is serialized?
● Transient keyword
● Process of serialization
● Process of deserialization
● Version control
● Changing the default protocol
● Creating your own protocol via Externalizable
2
4. What is Serialization?
● Ability to read or write an object to a stream
– Process of "flattening" an object
● Used to save object to some permanent storage
– Its state should be written in a serialized form to a
file such that the object can be reconstructed at a
later time from that file
● Used to pass on to another object via the
OutputStream class
– Can be sent over the network
4
5. Streams Used for Serialization
● ObjectOutputStream
– For serializing (flattening an object)
● ObjectInputStream
– For deserializing (reconstructing an object)
5
6. Requirement for Serialization
● To allow an object to be serializable:
– Its class should implement the Serializable interface
● Serializable interface is marker interface
– Its class should also provide a default constructor (a
constructor with no arguments)
● Serializability is inherited
– Don't have to implement Serializable on every class
– Can just implement Serializable once along the
class hierarchy
6
7. Non-Serializable Objects
● Most Java classes are serializable
● Objects of some system-level classes are not
serializable
– Because the data they represent constantly changes
● Reconstructed object will contain different value
anyway
● For example, thread running in my JVM would be
using my system's memory. Persisting it and trying to
run it in your JVM would make no sense at all.
● A NotSerializableException is thrown if you try to
serialize non-serializable objects
7
9. What is preserved when an object
is serialized?
● Enough information that is needed to reconstruct
the object instance at a later time
– Only the object's data are preserved
– Methods and constructors are not part of the
serialized stream
– Class information is included
9
11. When to use transient keyword?
● How do you serialize an object of a class that
contains a non-serializable class as a field?
– Like a Thread object
● What about a field that you don't want to to
serialize?
– Some fields that you want to recreate anyway
– Performance reason
● Mark them with the transient keyword
– The transient keyword prevents the data from being
serialized
– Serialization does not care about access modifiers
such as private -- all nontransient fields are
considered part of an object's persistent state and 11
are eligible for persistence
12. Example: transient keyword
1 class MyClass implements Serializable {
2
3 // Skip serialization of the transient field
4 transient Thread thread;
5 transient String fieldIdontwantSerialization;
6
7 // Serialize the rest of the fields
8 int data;
9 String x;
10
11 // More code
12 }
12
14. Serialization: Writing an Object
Stream
● Use its writeObject method of the
ObjectOutputStream class
public final void writeObject(Object obj)
throws IOException
where,
– obj is the object to be written to the stream
14
15. Serialization: Writing an Object
Stream
1 import java.io.*;
2 public class SerializeBoolean {
3 SerializeBoolean() {
4 Boolean booleanData = new Boolean("true");
5 try {
6 FileOutputStream fos = new
7 FileOutputStream("boolean.ser");
8 ObjectOutputStream oos = new
9 ObjectOutputStream(fos);
10 oos.writeObject(booleanData);
11 oos.close();
12 //continued...
15
18. Deserialization: Reading an Object
Stream
● Use its readObject method of the
ObjectInputStream class
public final Object readObject()
throws IOException, ClassNotFoundException
where,
– obj is the object to be read from the stream
● The Object type returned should be typecasted to
the appropriate class name before methods on that
class can be executed
18
19. Deserialization: Reading an Object
Stream
1 import java.io.*;
2 public class UnserializeBoolean {
3 UnserializeBoolean() {
4 Boolean booleanData = null;
5 try {
6 FileInputStream fis = new
7 FileInputStream("boolean.ser");
8 ObjectInputStream ois = new
9 ObjectInputStream(fis);
10 booleanData = (Boolean) ois.readObject();
11 ois.close();
12 //continued...
19
23. Version Control: Problem Scenario
● Imagine you create a class, instantiate it, and write
it out to an object stream
● That flattened object sits in the file system for some
time
● Meanwhile, you update the class file, perhaps
adding a new field
● What happens when you try to read in the flattened
object?
– An exception will be thrown -- specifically, the
java.io.InvalidClassException
– Why? (See next slide)
23
24. Unique Identifier
● Why exception is thrown?
– Because all persistent-capable classes are
automatically given a unique identifier
– If the identifier of the class does not equal the
identifier of the flattened object, the exception
will be thrown
24
25. Version Control: Problem Scenario
Again
●
However, if you really think about it, why
should it be thrown just because I added a
field? Couldn't the field just be set to its
default value and then written out next time?
●
Yes, but it takes a little code manipulation.
The identifier that is part of all classes is
maintained in a field called serialVersionUID.
●
If you wish to control versioning, you simply
have to provide the serialVersionUID field
manually and ensure it is always the same,
no matter what changes you make to the
classfile.
25
26. How Do I generate a Unique ID?
Use serialver utility
● serialver utility is used to generate a unique ID
● Example
serialver MyClass
MyClass static final long serialVersionUID =
10275539472837495L;
26
28. Provide your own readObject() and
writeObject() methods
● Used when the default behavior of readObject()
and writeObject() are not sufficient
● You provide your own readObject() and
writeObject() in order to add custom behavior
● Example
// Provide your own readObject method
private void readObject(ObjectInputStream in) throws IOException,
ClassNotFoundException {
// our "pseudo-constructor"
in.defaultReadObject();
// now we are a "live" object again, so let's run rebuild and start
startAnimation();
} 28
30. Externalizable Interface
● The writeExternal and readExternal methods of the
Externalizable interface can be implemented by a
class to give the class complete control over the
format and contents of the stream for an object and
its supertypes
● These methods must explicitly coordinate with the
supertype to save its state
● These methods supersede customized
implementations of writeObject and readObject
methods
30
31. How does Object Serialization
Scheme works with Externalizable
● Object Serialization uses the Serializable and
Externalizable interfaces
● Each object to be stored is tested for the
Externalizable interface
– If the object supports Externalizable, the
writeExternal method is called
– If the object does not support Externalizable and
does implement Serializable, the object is saved
using ObjectOutputStream.
31