Java: Why do we use getter and setter methods?

a thread...

In Java classes, we normally create the getter and setter methods to read and update class level fields respectively.

Let's find out why do we following this practice.

Consider a class "Account", having fields like accountName and accountBalance - to show the name and balance of the account.

As a common practice, both the variables are private and define the public getter and setter method to read and write their values.

Eg:

Using the above example, let's see different use-cases where having getter and setter methods can be game-changing.

1. Validation:

The public getter and setter method act as a single door to access the private fields.

Before updating the value we can run any validation in the setter method and accordingly allow field modification.

Eg:

Navigation in Ancient India

#LongThread

Indian civilization has been without a break for the last few millennia. This means there have been external connections and indigenous maritime assets.

Among the remains, the maritime assets archaeology are much prized and cited, a dock being the most prized. It also precludes the requirement of knowledge of the seas i.e. a compass.

The very word Navigation is derived from the Sanskrit word ‘Navgatih’. The word navy is also derived from Sanskrit ‘Nou’.

There were Sanskrit terms for many parts of a ship. The ship’s anchor was known as Nava-Bandhan-Kilaha which literally means ‘a nail to tie up a ship’. The sail was called Vata Vastra, which means ‘wind-cloth’.

Angular Roadmap for Beginners in 2022.

🧵

⇝ Fundamentals ⇜

➙ Typescript
➙ Angular CLI
➙ NgModules

• Components

➙ Class
➙ Template
➙ Metadata

• Template Syntax

➙ Interpolation
➙ Property Binding
➙ Two-way binding
➙ Pipes
➙ Template Reference Variables

➪ Directives

➪ Component

• Structural
➙ ngSwitch
➙ ngFor
➙ ngIf

• Attribute
➙ NgClass
➙ NgStyle

➪ Component Styling
➙ Input
➙ Output

➪ Component Interaction
➙ Lifecycle methods

⇝ Advanced Topics ⇜

➪ Services

➙ Dependency Injection
➙ Providing Services

➪ Observables

➙ Creating Observables
➙ Subscribing to Observables
➙ Executing Observables
➙ Disposing Observables
➙ Operators

🌺Shree Jagannath Temple, Khallikot, Ganjam, Odisha🌺

This temple is Recognised as the 2nd largest Jagannath Temple after Puri Jagannath Temple. If historians are to be believed, construction of this Temple in Khallikote was started in 1730 by King

Jagannath Mardraja-I& completed by his grandson Jagannath Mardraja-II in year 1868.According to some ancient texts Bhagwan Jagannath along with brother Balbhadra & sister Subhadra spent some of their time in this temple during their exile when Mughals attacked Sri Mandira in Puri

This temple is grand & the outer walls are beautifully carved with the sculptures of Dasavatara, AstaDigapalas, Different other avataras of Vishu ( i.e. Janardhan, Madhav, Lakshmi Narayan etc), some beautiful Nagas, Nartakis etc.

Every single stone is carved beautifully in this temple which will mesmerize you for sure.But this ancient Shree Jagannath Temple in Khallikote of Ganjam district is in a dilapidated state due to alleged lack of maintenance by the government.

It is believed that if immediate steps are not taken towards the renovation of the temple, the centuries-old structure might even collapse.

76 Super Tips to make killer profits doing Option Buying in #BankNifty

On the occasion of our 76th Independence Day.
🧵

76. BankNifty's move depends on moves of mainly 5 banks - HDFCBank, ICICI Bank, SBI, Kotak & Axis bank: track OI buidup & PA of these daily.

75. Open charts of each of these banks daily & see which is near an important resistance or support, that can affect BankNifty's movement immensely the next day - track that bank closely the next day.

74. HDFCBank (26%) & ICICIbank (23%) are the biggest contributor in BankNifty : give more importance to these two.

73. SBI, Kotak & Axis bank each contribute around 11%, but if two of them align with each other & HDFCBank & ICICI are neutral, they'll decide the direction.

72. SBI being the major PSU bank, can move opposite to these giants & create a turbulence, keep it in mind.

Magic formula for Financial independence:-

Mcap less than 1000 cr
EBIDTA minimum 15%
Existing capacity above 85%
New upcoming capex minimum 50% of current fixed asset
Reducing Debt
Majority of new capex from internal accruals.

I am sure this will help you find good stocks.

Vwap with Pivot Points

Intraday Trading strategy for Trend followers ( Will share also for mean reversion trader as soon as possible )

Intraday Trading Strategy Thread 🧵

Support us by Retweet to reach and benefit maximum traders

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A basic framework of the system with calculation using simple standard pivot point with default settings ( On Trading view traditional pivot points )

Always focus first on risk per trade and then reward

Scroll down for examples👇

Chart example no - 1 for Trend Followers. Read the wording in the chart image along with the above framework to understand in a better way

Scroll down for more examples 👇

Chart example - 2 . Using pullback rejection maximum times make our risk smaller with high reward

Scroll down for more examples 👇 c

Chart example - 3. When the range are wider lesser the chance for Directional moves only high chance of sideways auction

Scroll down for more examples 👇

If you struggle with focus, read this:

Psychology thread

1. Eliminate distractions. 

Make a practice to block time in your schedule to do a specific task or activity.

Shutting off both internal and external disturbances can help you to concentrate.

2.Reduce multitasking. 

Attempting to perform multiple activities at the same time makes us feel productive.

It’s also a recipe for lower focus, poor concentration, and lower productivity. And lower productivity can lead to burnout.

3. Practice mindfulness and meditation. 

Meditation is the #1 exercise to increase your brainpower.

Stress clouds your thinking, so relieve stress with meditation. It’s easy!

4. Get more sleep.

Many factors affect your sleep.

A good laugh and a long sleep are the best cures in the doctor’s book. 
• Irish Proverb

Trump supporters have gathered outside Mar-a-Lago to stand up for treason

History of GDP (PPP)

from 1 AD to 1000 AD India was richest country of the world.
Then Islamic terrorists came in India and China became first.
Again in 1600 rule of Birtish East India company India became first country.

Then british rule and its money drain policy made India worst and Soon India became down.
In 1950 India was on 9th Rank And this position remain till 1975

In 2000 during Atal era India did good growth and India reached at third position And In 2000 Ind GDP(PPP) INDIA became 5 trillion dollar economy.
From 2000 to 2011 during UPA era
India gained only 1 trillion $ and GDP was 6 trillion US $

In 2014 when Modi came India was 7 trillion dollar GDP
Now In 2022 India is becoming 12 trillion dollar GDP.

Simply UPA from 2005- 2014 performed very bad else we could have achieved 18 trillion US $ GDP if we have the same growth as during ABV time.

90 million active demat accounts in India.

Less than 1% understand Fibonacci retracement.

This mega thread will help you understand better—starting today:

Collaborated with @AdityaTodmal

1/What is Fibonnaci (Fibo) retracement?:

•Fibo retracement levels help us to identify potential reversal area or identifying potential entry point after a pullback.

•It represents various levels of significance within a swing high and low.

2/How to plot the Fibo?

•Spot the recent swing high & swing low (usually a peak & a low) on a chart.

•Plot the Fibo on these points.

•You'll get 5 key levels of support & resistance (S/R) in between the peak & low.

•Key Fibonacci ratios: 23.6%, 38.2%, 50%, 61.8%, & 100%.

3/ Importance of retracement levels:

• The retracement level forecast can determine the level at which retracement is likely to occur.

• These retracement levels offer traders a favourable entry to open new trades in the direction of the trend.

4/ When to apply Fibo:

•Fibonacci analysis can be applied when there is a noticeable up-move or down-move in prices.

•Applying it in range bound markets would turn out to be a futile exercise.

Buyers vs Sellers

A simple technique to understand the index direction using candlesticks chart.

Intraday Trading Thread 🧵

Retweet to reach & benefit maximum traders

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Here i am just trying to focus on few candlestick formation and trying to understand buyers vs sellers at reference levels. In trading less is more

Type 1 - Buyers aggression
Type 2 - Sellers aggression
Type 3 - Full confusion

Follow stay away approach when you are confused

Chart 1. Looking at candlesticks formation at reference levels is way more better than looking candlesticks everywhere or every second

Scroll down 👇

Chart example - 2

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Chart example - 3

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Important Concepts from Power of Stocks— Subhasish Pani

7+ years of trading experience in 14 tweets🧵

Collaborated with @niki_poojary

1/— Inside Candles

Inside Candle, breakout strategy has very good accuracy.

There are two candles in the inside candle, the mother candle, and the baby candle.

He trades the breakout of the high/low of the baby candle with the opposite level as a stop loss.

When to pyramid the trade if it goes right?

The next level to add more quantity is the mother candle's high or low, depending on a breakout or breakdown.

The stop loss will remain the baby candle low during a breakout and vice versa during a breakdown.

2/— Big Gap up

If the market is bullish, next day if it opens a big gap up then the buyers are already in profit.

Most traders don't want to see their MTM reduced in such times.

Wait for the first red candle and short the first 5 min red candle with a day high stop.

The R:R is too good in such setups.

There are multiple videos of him catching the day high with this setup.

Everyone's looking for selling puts and he makes money selling calls.

Lets start !!!

On Saturday we got surprised announcement of Excise Cut !!

Lets see how the market are placed

As per EOD data, on weekly chain (26/5 expiry)Top 10 CE OI is standing at Rs 254,154,9742/- and top 10 PE OI is standing at Rs 422,770,9945/-. On the face of it, looks like PE value is almost double of CE OI. But here one has to understand that BNF was up 1000 points on Friday

and by nature CE OI will be less. Now going one step further , we will see if BNF starts to crack above 34500, then CE writer to the tune of Rs 1,44,92,96,512/- will be in trouble and above 34800 the figure goes to Rs 2,21,63,59,860/-. Means almost 90% of top 10 CE OI will be

trapped. On PE side the writer will be trapped below 34200 only to the tune of Rs 3,06,01,91,770.00 .

Lets concentrate more on CE side due to AFTER MARKET NEWS !!.

We noticed " OI IMBALANCE BETWEEN CE AND PE " last week(TuesdaY) which exploded on Thursday on

downside and then BNF DID DHAARAMMMM !!!. Here we are seeing the exact opposite scenario. The reason for expecting good upmove on upside is that there is literally NO WRITING IN PE above 34500 and if BNF starts to travel above 34500, then the CE seller will be in loss and

BNF made a high of 34800 today and then fell to 34490 towards the end. A fall of 300 points from the top. Every fall and rise are lead by few stocks and today the fall was lead by NIFTY and in NIFTY ,RELIANCE was the villian. Generally whenever Nifty will fall it will take other

down also. So BNF fell today under the weight of Reliance. Now some data churning of this fall.

If you will see the OC of BNF weekly, there was across the board PE writing while there was reduction in CE OI even after this steep fall from the high.

Lets see what happened to 34300 CE during this fall. This is the nearest ITM on closing basis today.

See in below PIC the price of 34300CE is falling and OI is also falling. Fall in OI with rise in Price is bullish for the option, where as fall in OI with fall in price means

smart money getting out at cheap cost. The marked four boxes will reveal a big story in itself. I really dont know what will happen tomorrow neither interested to know also. Carrying ZERO position makes life easy. But seeing EOD data of BNF, i wont be bearish on BNF

The AVWAP from weekly high on this CE is at 370 and we closed around 358 today. Nothing much. But if this CE trades above 370 tomorrow , i will like to participate in upmove rather than downmove.

In 2012, my first options trade lost $9,000.

12 months later I was making $1,100 per week trading in my free time.

What changed?

I read 20 books on options and finished a master’s degree.

But what took my game to the next level was Python.

Here’s the code I still use today:

A quick primer on options in case you're not familiar:

• Over $450 billion in notional trades DAILY
• 39 million options contracts trade DAILY
• 25% of total options trading is from retail

So how do we make money?

Trade options with a simple, 3-part framework:

1. Design your risk
2. Value the position
3. Measure and monitor

Now pair this framework with Python and you get a potent combination for making money trading options.

Let's dig in:

To design our risk profile, we need the option payoff.

Let's start by defining the variables we need:

• Stock price
• Strike price
• Time to expiration
• Interest rate
• Volatility

We also define market prices for demonstrating trades.

Remember our payoff functions for calls and puts?

• call = max(S - K, 0)
• put = max(K - S, 0)

We can define them in Python in one line of code each.

And here's where it gets really interesting.

हर शुभ कार्य से पहले क्यों बनाया जाता है स्वास्तिक, जानिए इसका कारण और रहस्य?

स्वस्तिक अत्यन्त प्राचीन काल से भारतीय संस्कृति में मंगल और शुभता का प्रतीक माना जाता रहा है। हिंदू धर्म में किसी भी शुभ कार्य से पहले स्वास्तिक का चिन्ह अवश्य बनाया जाता है। स्वास्तिक शब्द सु+अस+क

शब्दों से मिलकर बना है। 'सु' का अर्थ अच्छा या शुभ, 'अस' का अर्थ 'सत्ता' या 'अस्तित्व' और 'क' का अर्थ 'कर्त्ता' या करने वाले से है। इस प्रकार 'स्वस्तिक' शब्द में किसी व्यक्ति या जाति विशेष का नहीं, अपितु सम्पूर्ण विश्व के कल्याण या 'वसुधैव कुटुम्बकम्' की भावना निहित है। 'स्वस्तिक'

अर्थात् 'कुशलक्षेम या कल्याण का प्रतीक ही स्वस्तिक है। स्वस्तिक में एक दूसरे को काटती हुई दो सीधी रेखाएँ होती हैं, जो आगे चलकर मुड़ जाती हैं। इसके बाद भी ये रेखाएँ अपने सिरों पर थोड़ी और आगे की तरफ मुड़ी होती हैं। स्वस्तिक की यह आकृति दो प्रकार की हो सकती है। प्रथम

स्वस्तिक, जिसमें रेखाएँ आगे की ओर इंगित करती हुई हमारे दायीं ओर मुड़ती हैं। इसे 'स्वस्तिक' कहते हैं। यही शुभ चिह्न है, जो हमारी प्रगति की ओर संकेत करता है।स्वस्तिक को ऋग्वेद की ऋचा में सूर्य का प्रतीक माना गया है और उसकी चार भुजाओं को चार दिशाओं की उपमा दी गई है।

सिद्धान्तसार नामक ग्रन्थ में उसे विश्व ब्रह्माण्ड का प्रतीक चित्र माना गया है। उसके मध्य भाग को विष्णु की कमल नाभि और रेखाओं को ब्रह्माजी के चार मुख, चार हाथ और चार वेदों के रूप में निरूपित किया गया है। अन्य ग्रन्थों में चार युग, चार वर्ण, चार आश्रम एवं धर्म, अर्थ, काम और मोक्ष

Did you know about an Indian chemical scientist named Acharya Prafulla Chandra Ray?

💮‘Revolutionary in the garb of a Scientist’💮
– this is what British govt. records mention about chemical scientist Acharya Prafulla Chandra Ray.

He was born on the 2nd of August 1861 at Jessore, Bengal. He supported freedom fighters, making arrangements for their stay and food in his factories in Bengal. A staunch patriot, he was against British rule and oppression.

He helped freedom fighters in the manufacturing of expl0sives for use against the British.

‘Science can wait, Swaraj cannot’ - Acharya Prafulla Chandra Ray. He is called the father of chemical science in India.

He was the founder of India's first pharmaceutical company, Bengal Chemicals & Pharmaceuticals. He had written 107 research papers in all branches of Chemistry, authored ‘A History of Hindu Chemistry’,

‘A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century’, and more books. For his research in inorganic and organic nitrites, he was addressed as ‘Master of Nitrites’.

Scientific definition of vāstu-sāstra
Which rishis developed this and why?

#thread
#tuesdayvibe

Vastu is derived from the Word Vasti, which means place of residing or house. The origin of Vastu can be traced to centuries back.

We live surrounded by five elements of nature and energy of various type created by them. On an open ground these elements or energy fields operate freely,in complete equilibrium. When a structure is placed in this energy field this equilibrium is affected and has to be restored.

Vedic Maharishis always wanted to ensure the happiness and prosperity of all the living beings whether human beings or the environment around them. They always showed great concern in the prosperity and happiness of all. They created and formulated various codes of conducts for

living, which are stored in our ancient scripts like Vedas and Upanishads. Some of the very important Rishis and Maharishis who developed the norms for Vastu

•AtriRishi
•Anirudha
•Bhrigurishi
•Brispati Rishi
•BrahmaGarga
•Maya
•Narad
•Vashistaand

These details are available in Vastu Shastra by
•Vishavkarma
•Vasturatnavali
•Matsypuran
•Samargana Sutradhara
•Lilavati
•Silpratna
•Brihatsamhita
•Rajavallabha
•Narad Samhita
•Manasar
•Mayamat

🌺Mutilated but still standing tall, the incredible sculptures of Martand Sun Temple, Anantnag, Kashmir.🌺

The research and related archaeological findings done on the ruins of this magnificent temple dedicated to ‘Surya’, suggest that this temple was a pinnacle of

Kashmiri Temple architecture,which is a skilled blending of the Gandharan, Gupta and Greek styles of architecture.

The style of construction of the temple and the artistry exhibited in its construction was considered as rare among contemporary architecture.

The temple was constructed with a colonnaded courtyard with Greek style pillars, stretching 220 feet long and 142 feet wide, incorporating many smaller shrines.

The main shrine (‘Garbhagriha’) is the centralised structure with a possible pyramidal top, the most

common feature of the temples in Kashmir.

The inner walls of the mandapa which leads to the Garbhagriha (now without main deity Surya - The Sun God) is decorated with smaller sub shrines for other gods, such as Vishnu, and river Goddess Ganga and Yamuna on either side.

Some other defaced deities also adorn the inner mandapa.

Many sculptures on the outer walls and basement are not beyond recognition as they were completely mutilated and eroded due to the course of weather.

12 must read books on decision making and problem solving.

1. The great mental models

2. Thinking fast and slow

3. The art of war

4. Algorithms to live by

5. Poor charlie's almanack