#classloader

[maficmystery-fr]

Pointies are going slow but still happening. Life kinda came at me hard but I have time to draw again now.

[sayitwithsarcophilus]

I know this is unlikely to happen with higher education being so expensive right now, but if so many college students feel like they don't have the time and energy to do all their work as assigned, I think we need to make it easier to finish college with smaller classloads over a longer period of time. If someone can't handle a 15 credit courseload but can handle 10, they should be able to do that without being penalized, instead of taking on more than they can handle to maintain their status and burning out.

[inbabylontheywept]

I started writing short stories near the end of my senior year of college. Between finishing my senior project early and just having a much lower classload than previous years, I finally had enough breathing room to do things for fun.

I don't think I'd realized how bad the college burnout was until then. Honestly, I've been out of college for a little under 2 years now, and I'd say it's only recently that I've been able to enjoy all the things I used to. Before I graduated, it had been nearly three years since I read a book. I only really started reading again around eight or nine months ago.

Anyway: Those early short stories were published on r/HFY. They had a scifi theme, and as someone who had spent most of their adult life learning about science, I really appreciated that. I also liked the hopefulness of the stories.

The r/HFY subreddit has a yearly awards ceremony, but it lags the stories behind by a year. So the 2024 ceremony was explicitly written for stories in 2022, which is the year I started writing.

The subreddit got 18,000 and change submissions that year. 55 total nominations were chosen.

I was chosen twice. Once for Healing+Lightning=Wizard Launcher and again for Burning Bridges.

I don't know how to handle emotions this big, but I am so fucking proud of my work. Thank you all for reading it.

[forever-stuck-on-java-8]

Spent several hours today arguing with the other devs about how to rewrite our enterprise app launcher/updater because right now its pretty much a trojan.

in a nutshell: It currently downloads the individual JARs from our WildFly server, adds them to its classpath via the system classloader, then launches a target main method through reflection, effectively becoming that running process.

Someone from OPS found the list of security exceptions they needed to add to make it work (spoiler its a lot)

I hope the security team is preparing to have a heart attack when we have our meeting Wednesday

[firelord-zuzu127]

Hey guys! I know I’ve been gone for a hot minute but I had a concussion and finals and what not. I am also about to graduate and wanted to share my speech with you guys as well!

Roll For Initiative

(Firelord Zuko)

During my high school years one of my favorite ways to spend my free time was by playing D&D. I have been an avid Dungeons and Dragon player for about 5 years now. Those of you who happen to know this game, know that you create characters using intricate character sheets and ranking different stats to represent your character. I’m guessing I just lost a good chunk of you, it’s ok, I’m about to land this ship. I think of us as highschool students like characters that have spent the last four years “leveling up” or evolving as people. We are just D&D characters made to conquer this treacherous journey known as high school. Our greatest lesson as students isn't whether we know how to graph a parabola or all the conspiracy theories on the JFK assassination. Because, those lessons aren’t necessarily applicable in everyday life going forward. What is applicable is our character growth. Highschool truly is a journey and the people you meet and challenges you have faced affect who you turn out to be.

One thing about D&D is that the attributes you have are given certain modifiers, so when you roll you can add on a certain modifier. For example I thought I had a +3 in intelligence since I decided to take honors classes. What I didn’t realized was that I had a low wisdom modifier and that was going to be more useful. Wisdom is basically street smarts and common sense while intelligence is more book smart. One of the first the lessons I learned from (MATH TEACHER) was that grades aren’t as important as we think. Even with putting in more effort than ever before I still wasn’t doing as well in math as I used to. It didn’t matter if I had a +3 in intelligence, my rolls were just naturally low. Although, the struggle did make me realize that my grades weren’t going to define me. No college is gonna look back at you freshman year geometry grade and think you’re a failure. They probably aren’t even gonna look at the specific grade. They are more likely just going to look at what classes you took. I even learned to ask for help from a tutor my next year to keep up with my busy classload. It was very beneficial to learn early on perseverance and self worth, as a stable foundation to get through highschool.

This next teacher is probably one of the most impactful teachers in my life. I would compare this to the part of the journey where you meet a wise mentor who takes you under their wings. (ENGLISH TEACHER) was the first highschool teacher I met, even though I didn’t have any classes with him. At the end of 8th grade I remember emailing him because I was terrified about transitioning to highschool and if the teachers were nice. When I eventually became a freshman I was more worried about balancing my school work and extracurriculars. I wasn’t sure if it was worth the stress to join a bunch of different clubs while still having plenty of homework and no study hall. That’s when I realized that (ENGLISH TEACHER) was the sponsor for most of the clubs I wanted to do so and if he could handle teaching all his classes and clubs, then so could I. He taught me to never back down from opportunities and to take risks.

As we reach my Junior year my wisdom has begun to level out with my intelligence. That still didn’t take away from the issue of dyslexia. By that time I had accommodations but was often too anxious to remind my teachers about them. Yet, there was one English teacher who needed no reminder. (ENGLISH TEACHER 2) went above and beyond. When English III required a significant amount of reading and annotating, I didn’t want (ENGLISH TEACHER 2) to have to bend over backwards and read to me everytime. It turned out that I didn’t even have to ask, she had already downloaded recordings for me to use. She said she was willing to do anything that would “Even out the playing field” for me. She taught me that not only am I not a burden but my accommodations were deserved and a necessity.

Ultimately, we reached my senior year, and this is when I met a very special teacher. In D&D there is this class known as a bard. They are mainly seen as musicians and entertainers but during the heat of battle they help to heal party members and provide inspiration. This is the effect (ART TEACHER) had on me. She started teaching art in Mahomet at the beginning of second semester. That is also the semester I decided to take three art classes at once. When I was signing up for these classes a year earlier it was because I had just spent my Junior year completely stressed out. I had panic attacks everyday at even just the thought of going to school. (ART TEACHER) was able to take me from being a student who was terrified to attend class to someone who was openly excited to go to school. She did this by believing in me and never letting me give up. She tells all her students “Don’t crash out”. This means that when I tell myself that I can’t do it, she swoops in and says “Yes, you can.” In fact she always says yes no matter what I ask to do, allowing my creativity to stretch much farther than even just a piece of paper. She cares about her students deeply above all else. She believed in me and supported me and that filled me with the motivation I needed to reach my true potential. I gained initiative.

Undoubtedly, the people who have helped me mature the most as a person are my party members. I don’t just mean metaphorically at this point, the friends I play D&D with have had an immense amount of impact on my emotional development. Just as they support me in battle, they have supported me through life. We started traveling in a pack, never going anywhere alone. We learned to open up and be honest with each other. If we had issues with one another, we sat down and had mature conversations about boundaries and respect. So when it came time for us to fight our true adversaries, we wouldn’t have to face them alone. They never made me feel insignificant or weak if I had my own struggles. They showed me what it feels like to be loved and cherished.

So what lessons did I have to learn over the years to level up? From (MATH TEACHER) I learned the importance of self-worth and perseverance. From (ENGLISH TEACHER) I learned to never turn down opportunities and to leave my comfort zone. With (ENGLISH TEACHER 2) I was appreciated just the way I am and shown that it wasn’t a burden to ask for help. (ART TEACHER) motivated me to stick out through the end and pursue my passions. My party has been with me since the first foe and is here today as we fight the final boss.

I have all these incredible people to thank for endless wisdom, life lessons and my overall character development. Without the teachers and friends in your life you may have never turned out to be who you are today. After all, D&D is a social game, you could never play it alone.

Let me leave you with one final thought, a quote from an iconic dungeon master:

“It’s our time to write the story and we are going to make the world how we want it.” - Brennan Lee Mulligan

[dailydamnation]

Illyana Rasputin in Midnight Suns #1

That tracks for how I imagine Illyana being in front of a classroom. Protecting or saving children? Any day of the week. But keeping a classload of them calm and paying attention? I can’t see that going well for her or the students.

I like this art style much better than the cover. Very nice Illyana. Also Nico.

That’s right, Dessy, you’re a demon from Limbo, you have standards. Avengers, hah!

…Although that whole “demon from Limbo who’s practically a regular girl”-thing has never been addressed to my satisfaction. That’s never been how Limbo demons worked. I guess hell dimensions do reflect their ruler in form and function, so I suppose Illyana’s Limbo birthing a demon girl who just wants to be good kinda makes sense as an expression of Illyana’s subconscious wishes… Crap, I wanted to rant about badly thought out continuity, but I think I accidentally made myself okay with it and came up with a plot point that I really want to see explored…

[twofortea]

KKSK Week 2023 Submissions

Realizing I didn't do much self-promo on here for my kksk week fics, so they get one big post instead :) Day 1: Sharp Tongues Rating: M

Historic AU | Trapped in a small space | Innocent | “Never cruel or cowardly”

Sakura is 18 and set to be wed. It’s out of her hands, as most things are, but as the only child of her family, and a daughter no less, she’s expected to marry someone of prestigious status in order to secure her family’s future (and fortune). She’s been told for years of what life will be like when she’s finally married. The security, the contentment… What she didn’t anticipate from the process was the complete and utter boredom.

Day 2: What Trembles Underfoot Rating: T

Someone else’s show | Wingman

The Avatar has disappeared, and the Fire Nation is quickly expanding their influence across the lands. Kakashi is one of the generals leading the charge against the Earth Kingdom villages, and the days drag along in weary sequence, until a strange woman with green eyes captures his attention.

Day 3: Like To Get To Know You Rating: T

Modern AU | 3AM | Missed connections | “You have my sword”

You have my sword Considering it was the middle of the night and she had a completely ridiculous classload tomorrow, Sakura knew she should just shut her phone off and go back to bed. Yet for some reason, her fingers were already typing out a response. Who is this? The response was an immediate ping back. You’ve stolen more than one?

Day 4: Say What You Wish Rating: T Fantasy AU | Seduction

How does one get unlimited wishes from a genie? Seduce them of course.

Day 5: Office Hours Rating: E (Fem!Kakashi) Swapped | Booty call vs butt dial | “Oops”

She’s in the middle of teaching when her phone starts buzzing. Generally, Sakura has a self-imposed rule not to look at her phone during class since she expects the same focus from her students, but for some reason, today’s buzz has her fingers itching towards her pocket. She glances up to see if anyone is paying attention to her, but the class seems to either be occupied with the video on the projector screen, or asleep on their desk. This feels like as good a time as any to break her rule. Slinking down slightly in her chair, she pulls out her phone and flips it over. Call from: KH

Day 6: Death and the Maiden Rating: Unrated but not explicit Mythology AU | Morning after | “Not if you were the last person on earth”

“Who’s there?” The pause that follows is stifling, unsettling as it seeps into her bones. The room seems empty except for her… did she only imagine the voice? A hallucination borne from one too many sniffs of the red poppies blooming in the field? Then he steps forward.

Day 7: What You Don't Know (Sure Can Hurt You) Rating: T

Canon Divergence | Pakkun makes a startling discovery | Arranged Marriage | “Why are you in my house?”

“I found it,” the pug interrupted, pausing for a moment before he finished his statement, “in the study.” Kakashi’s next words were more of a snarl than anything, “What the hell were you doing there?” “Isn’t that besides the point?” the pug deflected. “Legally, you’ve been married since the girl turned 16.”

[thatenglishmuff]

Rejoice! The tumblr user that I see in my activity is back! :D

hihihii!!!!!!! <33333

yeah uhhhhhh so sorry I disappeared for like 3 months lol, I was furiously writing a UTY fanfic (being posted currently!!) and then school started back up again, and im a double major with full classload as well as rehearsing 2 shows at the same time soooooo yeah I didn't have time to eat, let alone be online... whoops!

but now, ive just closed one of the shows (we did murder on the orient express, and I was mrs.Hubbard, and it was an ABSOLUTE BLAST!!!!!!!!! would do it again in a heartbeat), and tech for my other show starts in a week, so things are starting to mellow out a little, kinda, ish, and im back babeyyyyyy!!!!!!

[katisconfused]

Yeah this is the worst part of burnout. I had a health collapse from trying to keep up with the minimum classload for finacial aid in college with multiple unaccommodated disabilities, and was forced to drop out after hitting the max absences for the semester while still in the drop period. Unable to work or go back to school i sought treatment.

90% of the health care system treated it as a motivational issue. I remember like 4 years of deterioating from that in having a psych evaluation. I was given a depression test with hundreds of questions half of which were rewordings of each other. The results came back with a lot of "I would like to x but cannot". The doctor could not understand why, or why I said I had no intention of subjecting myself to finishing a graphic design degree when I couldn't sit in a desk longer than 20 minutes without nerve pain.

I think this is happening a lot with COVID too. A health problem where the most important thing is rest in a culture where you have to earn the right to it requires the culture to change to accommodate it. So you have to just barely acknowledge it and act like their are tools for individuals to stay healthy while encouraging them to ignore the quietly accumulating damage. And then when you do everything they say and it fucks you up it's still your lack of drive that's the problem and fully on you.

The data does not support the assumption that all burned out people can “recover.” And when we fully appreciate what burnout signals in the body, and where it comes from on a social, economic, and psychological level, it should become clear to us that there’s nothing beneficial in returning to an unsustainable status quo. 

The term “burned out” is sometimes used to simply mean “stressed” or “tired,” and many organizations benefit from framing the condition in such light terms. Short-term, casual burnout (like you might get after one particularly stressful work deadline, or following final exams) has a positive prognosis: within three months of enjoying a reduced workload and increased time for rest and leisure, 80% of mildly burned-out workers are able to make a full return to their jobs. 

But there’s a lot of unanswered questions lurking behind this happy statistic. For instance, how many workers in this economy actually have the ability to take three months off work to focus on burnout recovery? What happens if a mildly burnt-out person does not get that rest, and has to keep toiling away as more deadlines pile up? And what is the point of returning to work if the job is going to remain as grueling and uncontrollable as it was when it first burned the worker out? 

Burnout that is not treated swiftly can become far more severe. Clinical psychologist and burnout expert Arno van Dam writes that when left unattended (or forcibly pushed through), mild burnout can metastasize into clinical burnout, which the International Classification of Diseases defines as feelings of energy depletion, increased mental distance, and a reduced sense of personal agency. Clinically burned-out people are not only tired, they also feel detached from other people and no longer in control of their lives, in other words.

Unfortunately, clinical burnout has quite a dismal trajectory. Multiple studies by van Dam and others have found that clinical burnout sufferers may require a year or more of rest following treatment before they can feel better, and that some of burnout’s lingering effects don’t go away easily, if at all. 

In one study conducted by Anita Eskildsen, for example, burnout sufferers continued to show memory and processing speed declines one year after burnout. Their cognitive processing skills improved slightly since seeking treatment, but the experience of having been burnt out had still left them operating significantly below their non-burned-out peers or their prior self, with no signs of bouncing back. 

It took two years for subjects in one of van Dam’s studies to return to “normal” levels of involvement and competence at work. following an incident of clinical burnout. However, even after a multi-year recovery period they still performed worse than the non-burned-out control group on a cognitive task designed to test their planning and preparation abilities. Though they no longer qualified as clinically burned out, former burnout sufferers still reported greater exhaustion, fatigue, depression, and distress than controls.

In his review of the scientific literature, van Dam reports that anywhere from 25% to 50% of clinical burnout sufferers do not make a full recovery even four years after their illness. Studies generally find that burnout sufferers make most of their mental and physical health gains in the first year after treatment, but continue to underperform on neuropsychological tests for many years afterward, compared to control subjects who were never burned out. 

People who have experienced burnout report worse memories, slower reaction times, less attentiveness, lower motivation, greater exhaustion, reduced work capability, and more negative health symptoms, long after their period of overwork has stopped. It’s as if burnout sufferers have fallen off their previous life trajectory, and cannot ever climb fully back up. 

And that’s just among the people who receive some kind of treatment for their burnout and have the opportunity to rest. I found one study that followed burned-out teachers for seven years and reported over 14% of them remained highly burnt-out the entire time. These teachers continued feeling depersonalized, emotionally drained, ineffective, dizzy, sick to their stomachs, and desperate to leave their jobs for the better part of a decade. But they kept working in spite of it (or more likely, from a lack of other options), lowering their odds of ever healing all the while. 

Van Dam observes that clinical burnout patients tend to suffer from an excess of perseverance, rather than the opposite: “Patients with clinical burnout…report that they ignored stress symptoms for several years,” he writes. “Living a stressful life was a normal condition for them. Some were not even aware of the stressfulness of their lives, until they collapsed.”

Instead of seeking help for workplace problems or reducing their workload, as most people do, clinical burnout sufferers typically push themselves through unpleasant circumstances and avoid asking for help. They’re also less likely to give up when placed under frustrating circumstances, instead throttling the gas in hopes that their problems can be fixed with extra effort. They become hyperactive, unable to rest or enjoy holidays, their bodies wired to treat work as the solution to every problem. It is only after living at this unrelenting pace for years that they tumble into severe burnout. 

Among both masked Autistics and overworked employees, the people most likely to reach catastrophic, body-breaking levels of burnout are the people most primed to ignore their own physical boundaries for as long as possible. Clinical burnout sufferers work far past the point that virtually anyone else would ask for help, take a break, or stop caring about their work.

And when viewed from this perspective, we can see burnout as the saving grace of the compulsive workaholic — and the path to liberation for the masked disabled person who has nearly killed themselves trying to pass as a diligent worker bee. 

I wrote about the latest data on burnout "recovery," and the similarities and differences between Autistic burnout and conventional clinical burnout. The full piece is free to read or have narrated to you in the Substack app at drdevonprice.substack.com

[freshyblog07]

Top Java Interview Questions and Answers You Must Know in 2025

Preparing for a Java developer role? Whether you're a fresher or an experienced candidate, being well-versed with common Java interview questions can significantly boost your confidence and chances of landing the job.

In this blog, we’ll cover the most frequently asked Java interview questions along with quick answers and explanations.

📘 Looking for a complete, detailed list of Java interview questions? 👉 Check out the full guide here: Java Interview Questions – Freshy Blog

🔹 Why Java?

Before jumping into questions, let’s quickly recall why Java is such a sought-after language:

Platform independent

Strong community support

Object-oriented

Robust memory management

Used in web, mobile, and enterprise apps

🔸 Basic Java Interview Questions

What is Java? Java is a high-level, object-oriented programming language known for its platform independence via the Java Virtual Machine (JVM).

What are the main features of Java?

Object-Oriented

Secure

Portable

Robust

Multithreaded

What is the difference between JDK, JRE, and JVM?

JDK: Development kit for Java

JRE: Environment to run Java applications

JVM: Java Virtual Machine that executes code

🔸 OOPs & Core Concepts Questions

What is inheritance in Java? Inheritance allows one class to acquire properties and methods of another class using extends.

What is the difference between method overloading and overriding?

Overloading: Same method name with different parameters in the same class

Overriding: Same method signature in child and parent class

🔸 Advanced Java Interview Questions

What is a Java ClassLoader? A part of JVM that loads classes during runtime.

What is the difference between HashMap and Hashtable?

HashMap: Non-synchronized, allows one null key

Hashtable: Thread-safe, doesn’t allow null keys/values

Explain exception handling in Java. Using try-catch-finally blocks to gracefully handle run-time errors.

📚 Want More Questions with Answers?

These are just a few of the most asked Java questions. If you're preparing for interviews and want more in-depth explanations and examples:

🔗 Visit the full post here: 👉 https://www.freshyblog.com/java-interview-questions/

It includes:

Java 8 features

Multithreading questions

Collections framework

Spring Boot & JDBC-related questions

Real interview scenarios

✅ Final Tips for Java Interviews

Practice coding daily

Build sample projects

Revise OOPs and exception handling

Study frequently used Java libraries

[inkoflethe]

My parents and I were talking about my high school experience last night and my dad said something about how it was so much more intense than most people's.

Which, if we're talking about the general populous, is 100% true. My STEM program had silicone valley vibes.

But he was comparing it to other people in the STEM program. The one with silicone valley vibes.

I laughed so hard and informed him that among that population, my classload and activities intensity was average at most. Probably right around 50 percentile? But very possibly lower and definitely no more than 60. He was so confused and I found it so hilarious.

[freeonlinejavacourse]

Top 60 most asked Java interview questions: crack like hack

Top 60 most asked Java interview questions It gives this guide easy navigation through every possible concept which could assist you either as a beginner entering into the tech world or an experienced developer wanting to progress and learn technical questions in java. Although, we have blogs related to becoming java developer full guide ,  how to become graphic designer in 2025 and Java full stack developer course free : A complete guide check it out.

Core Java Concepts: A refresher course on OOP principles, collections, and exceptions. Advanced Topics: Understanding multithreading, design patterns, Java 8 features including lambda expressions and streams with Java code interview questions. Practical Scenarios: Real-world examples that make you shine during the technical discussions. Interview-Ready: Java code interview questions Solaractical examples and explanations to build unfaltering confidence.

What we have for you ? core java interview question with answers

💡 You will now be brimming with strength, ready to tackle not just the routine questions but also the toughest questions if any arise, impress the hiring managers, and, of course, get through the offer!

👉 So begin your journey to becoming the Java professional everyone wants to have on board.

What is Java? Certainly, Java is a high-level, class-based object-oriented programming language, with minimal implementation dependency. It operates on the principle of “write once, run anywhere.” That is, compiled Java code can be run on all those platforms that support Java without recompilation.”  

What are the unique features of Java? -Dynamic -High

Performance -Secure

Robust

Distributed

Multithreaded

Platform-independent

Object-oriented  

3.Difference between JDK, JRE, and JVM. -JDK: Java Development Kit:  It contains the Java Runtime Environment and an assortment of development tools used for Java application development. -JRE: Java Runtime Environment. This is a part of a computer and thus is not a tool given for Java. It provides the set of libraries and JVM needed to run Java applications. -JVM: Java Virtual Machine. An abstraction of a computer that allows a computer to execute Java programs by converting bytecode into machine-specific code.  

4,What do you understand by ClassLoader in Java? ClassLoader in Java is a component of the Java Runtime Environment that is responsible for dynamically loading Java classes into the Java Virtual Machine. A ClassLoader finds and loads the class files at runtime.

5.Explain Object-Oriented Programming (OOP)

OOP is the programming paradigm based on the idea of “objects,” containing both data and code to manipulate that data. Four key important principles:

Encapsulation -Inheritance

Polymorphism

Abstraction  

6.What is inheritance in Java?

Inheritance is the process of taking attributes and behaviors from one class to another, It is the mechanism through which a new class (subclass) inherits from an existing one (superclass). Inheritance supports code reusability and creates a relationship between classes, i.e., a superclass-subclass relationship. Top 60 most asked Java interview questions is one of important question  

7.Polymorphism in Java?

More simply, polymorphic methods work differently depending on the object invoking them. Thus, polymorphism is of two types: name polymorphism and method overriding.

Compile-time polymorphism (Method Overloading)

Runtime polymorphism (Method Overriding)

8. What is encapsulation in Java?

Certainly, Encapsulation wraps the data (variables) and the code (methods) together as a single unit. Also, Developers achieve this by making the variables private and providing public getter and setter methods. But restricts direct access to some of the object’s components, which can prevent an accident song of data.

9. What is abstraction in Java?

Abstraction refers to the preventing the viewing of the complex implementation details while showing only the essential features of an object. It can be implemented. through abstract classes and interfaces.

10. What is the difference between an abstract class and an interface?

An abstract class is the one with both abstract and concrete methods and can maintain state via instance variables. A class can inherit an abstract class. An interface only has abstract methods (until Java 8, which introduced default and static methods) and cannot maintain state. A class can implement multiple interfaces.

11. What is a constructor in Java?

A constructor is a special method. which is called when an object is created. It has the same name as the class and no return type. It can also be overloaded, meaning that one class can have multiple constructors that can accept different numbers of parameters.

12. What is the difference between method overloading Certainly, Method overloading introduces the same names to multiple methods in the same class. But Method overriding means that a subclass provides a specific implementation. for a method that was already defined in the superclass.

13. What is the ‘this’ keyword in Java?

Although, The ‘this’ keyword refers to the current instance of class. Also It is used to indicate access to class variables and methods, and it helps in distinguishing the class attributes and parameters with identical names. and Top 60 most asked Java interview questions is one of important question

14. What is the ‘super’ keyword in Java?

The ‘super’ keyword refers to the immediate parent class object and can be used to access superclass methods and constructors. 

15. A different comparison is the ‘== operator’ and the ‘equals()’ method in Java.

‘== operator’: Reference Comparison. It checks whether both references point to the same object or not.

‘equals()’ method: Compares for equality of the actual contents of the objects.

16. What is a static variable and a static method?

Static Variable: The variable that is shared across all instances of a class. It relates more to the class than to any instance of it.

Static Method: Refers to methods that belong to a class rather than the instance of an object. They do not require an instance of a class to be called.

17. What are Java Collections? Framework is a name given to the entire collection of classes and interfaces forming commonly reusable collection data structures such as lists, sets, queues, and Maps.

18. What is the difference between an ArrayList and a LinkedList in Java?

ArrayList: Certainly, Use dynamic arrays to store elements; it will provide fast random access but will be slow on insertions and deletions, especially in the middle.

LinkedList: Use doubly linked lists to store elements. It provides for faster insertions and deletions, but slower random access.

19. What is a Map in Java? Although, A map is an object that maps keys to values. It does not permit duplicate keys, and each key can map to at most one value worldwide.

20.What is the difference between HashMap and TreeMap in Java?

HashMap: Implements the Map interface using

21.What is the difference between HashSet and TreeSet?

HashSet: Uses a hash table for storage; does not maintain any order of elements.

TreeSet: Implements the NavigableSet interface and uses a red-black tree to maintain elements in sorted order.

22. Explain the differences between List and Set in Java.

List: It allows duplicate elements and maintains insertion order. Set:   Does not allow duplicate elements and does not guarantee any particular order.

23. Explain the differences between an array and an ArrayList.

Array: Fixed-size, which can store both primitives and objects. ArrayList:   Resizable, storing only objects.

24. What does the final keyword do in Java?

Final   Variable: Cannot change its value. Final   Method: This Cannot be overridden. Final   Class: Cannot be subclassed.

25. What is the difference between String, StringBuilder, and StringBuffer?

String:   Immutable, thread-safe. StringBuilder: Mutable, not synchronized, faster than StringBuffer. StringBuffer:   Mutable, thread-safe.

26. What is the purpose of the transient keyword in Java?

The transient keyword is used to indicate that a field should not be serialized.

27. What is a volatile keyword in Java?

It ensures all the changes to a variable are visible to all threads. Top 60 most asked Java interview questions is one of important question.

28. What are the differences between synchronized and lock in Java?

Synchronized:   Implicit locking mechanism. Lock: Offers more control and flexibility in locking. 

29. What is multithreading in Java? Multithreading allows concurrent execution of two or more threads for maximum utilization of CPU.

30. What are the states of a thread in Java?

New

Runnable

Blocked

Waiting

Timed Waiting

Terminated

31. What is the difference between wait(), notify(), and notifyAll()?

wait(): Pauses the thread and releases the lock.

notify(): Wakes up a single thread waiting on the object’s monitor.

notifyAll(): Wakes up all threads waiting on the object’s monitor.

32. What is garbage collection in Java? Garbage collection is the process of automatically reclaiming memory by removing unused objects.

33. What are the types of memory areas allocated by JVM?

Heap

Stack

Method Area

Program Counter Register

Native Method Stack

34. What are the differences between throw and throws?

throw: Used to explicitly throw an exception.

throws: Declares exceptions in the method signature.

35. What is the difference between checked and unchecked exceptions?

Checked Exceptions: Must be handled or declared in the method signature.

Unchecked Exceptions: Runtime exceptions that do not need to be explicitly handled.

36. What is an enum in Java?

Enums are special data types that define the list of constants.

37. What is reflection in Java?

Reflection is the ability to dynamically inspect and modify a class’s behavior during runtime.

38. What is the difference between shallow cloning and deep cloning?

Certainly, Shallow cloning, like cloning, copies the values of all fields without taking into account the objects referred to. But , Deep cloning is like for all fields, a brand new class instance is created at those places. Top 60 most asked Java interview questions is one of important question

39. What are the types of design patterns in Java?

Creational (e.g., Singleton, Factory) Structural (e.g., Adapter, Proxy) Behavioral (e.g., Observer, Strategy)

40. What is the Singleton design pattern?

A design pattern that restricts the instantiation of a class to just one object and provides a global point of access to it.

To know more click here

[openbooth]

How does the Java ClassLoader System really work? (with pictures) When I plunged into the world of Java class loaders, it was a response to a curious problem. Popular publications, supposed beacons of the Java world, are filled with conflicting and outdated information on the subject.

— https://ift.tt/HYMXS4d

[devtech-ascendancy-hub]

「類」的生命週期、ClassLoader 加載 | JVM 與 Class | Java 為例

Overview of Content JVM 會為 Java 程式提供執行的環境，而 JVM 其中一個重要的任務就是 管理類別、物件的生命週期，這個���文則針對 類（Class）說明 Java虛擬機（JVM）是 Java 程序的核心引擎，負責管理類別和物件的生命週期。本篇將深入探討 Java 類別的生命週期，以及 ClassLoader 在類別加載過程中的作用 JVM 與類加載：探索 JVM 的生命週期，從類別載入到初始化，深入了解 JVM 與類之間的關係。 類的生命週期：從載入階段到初始化階段，逐一解析類別的生命週期過程。 類的加載時機：探討類別的加載時機，包括啟動類別、物件創建和靜態元素初始化等。 Java ClassLoader 特點：了解 Java ClassLoader 的特性，包括 JVM…

[nehaprem]

"Discover Why Java is Trending: Its Features and Surprises"

               Java is a widely-used, platform-independent programming language known for its robustness, security, and versatility. Its object-oriented nature, automatic memory management, and extensive standard library simplify development, while features like multi-threading and robust exception handling enable the creation of high-performance, reliable applications.

Features:

These features make it a popular choice for a variety of application domains, from web development to mobile app development, and from enterprise software to embedded systems. In this introduction, we'll briefly highlight some of the key features of Java:

1.Object Oriented:

A language for object-oriented programming is Java. In Java, every element is an object. Because our software is object-oriented, it is organized as a collection of various objects that include both data and behavior.

By establishing some guidelines, the practice known as object-oriented programming (OOPs) makes it easier to design and maintain software.Basic OOP ideas include:

Object

Class

Inheritance

Polymorphism

Abstraction

Encapsulation

2.Simple

Java is considered an easy-to-learn programming language with a straightforward and comprehensible syntax.

According to Sun Microsystems, the language is deemed simple due to several factors. First, its syntax is rooted in C++, making it more accessible for programmers who already know C++.

3. Secured:

Java is renowned for its robust security features, which make it a preferred choice for developing virus-free systems. The security in Java is attributed to several key factors:

Classloader:

Java employs a Classloader mechanism as part of the Java Runtime Environment (JRE). This component dynamically loads Java classes into the JVM. It enhances security by segregating locally stored class packages from those retrieved from network sources, minimizing potential security risks.

Bytecode Verifier:

The bytecode verifier is responsible for inspecting code fragments for illegal instructions or actions that could breach access rights to objects. It ensures that the code adheres to Java's security constraints.

Security Manager:

Java incorporates a Security Manager component that governs and controls the access rights of classes. It determines which resources a class can access, including  permissions related to reading and writing to the local disk.

4. Platform Independence:

               Java's "Write Once, Run Anywhere" capability allows code to be compiled into bytecode, which can run on any platform with a compatible Java Virtual Machine (JVM). The Java platform differs from most other platforms in the sense that it is a software-based platform that runs on top of other hardware-based platforms. It has two components:

Runtime Environment

API(Application Programming Interface)

 5.Robust:

The term "robust" in English conveys strength and resilience. Java exhibits robust characteristics for the following reasons:

It employs effective memory management strategies.

Java avoids the pitfalls associated with pointers, enhancing security.

Automatic garbage collection, integral to the Java Virtual Machine, efficiently removes unused objects from Java applications.

Java incorporates exception handling and a rigorous type-checking system.

6.Portable:                Java's portability stems from its ability to transport Java bytecode seamlessly across various platforms doesn’t require any platform-specific implementations.

7. Architecture-neutral:

Java achieves architecture neutrality by eliminating implementation-dependent features, such as fixed sizes for primitive types.

In contrast to C programming, where the int data type consumes 2 bytes of memory on a 32-bit architecture and 4 bytes on a 64-bit architecture, Java maintains consistency by allocating 4 bytes of memory for int on both 32-bit and 64-bit architectures.

8. Dynamic:                Java exhibits dynamic characteristics as it enables the on-demand loading of classes and supports functions from its native languages, C and C++.

9. Interpreted:

The interpreted feature of Java refers to the fact that Java source code is not directly executed by the computer's hardware.

Instead, it is first compiled into an intermediate form called bytecode.

This bytecode is then executed by the Java Virtual Machine (JVM), which acts as an interpreter, translating the bytecode into machine-specific instructions at runtime.

10. High-performance:

Java is relatively faster compared to many traditional interpreted programming languages due to its bytecode, which is closer to native code.

However, it may still exhibit some performance lag when compared to fully compiled languages like C++. Java, while technically an interpreted language, does show improved performance over languages like C and C++, which are traditionally compiled.

11. Multi-threaded:

Multi-threading in Java allows for concurrent execution of tasks by creating separate threads, each resembling an independent program running simultaneously.

Java enables the creation of programs that handle numerous tasks concurrently through the definition of multiple threads.

12. Distributed:

Java is considered a distributed programming language because it empowers developers to create distributed applications.

Technologies like RMI (Remote Method Invocation) and EJB (Enterprise JavaBeans) are utilized for building distributed applications in Java.

"If you're looking to expand your knowledge of Java, I highly recommend reaching out to ACTE technologies. They offer certifications and job placement opportunities, and their experienced instructors can greatly enhance your learning experience. These services are available both online and offline. Taking a step-by-step approach and considering enrollment in one of their courses can be a valuable step if you're keen on learning more.

[0xfc963f18dc21]

this entire series is just unhinged but fascinating

summary below

340 (Reversing): if-closure-encoded linked lists

341 (Hexing): writing a classloader that reads binary runtime data for arbitrary classes for the JVM

342 (Typing): type-level N-queens in Haskell

353 (Rewriting): embedding a subset of C as a DSL in Clojure

354 (Unifying): creating a lisp in prolog, then creating a lambda calculus interpreter using that embedded lisp, to create a program in lambda calculus to balance trees