Практика Shadowing: 🚫 Java Deadlock Explained: Why Your Code is Stuck 😱 (Beginners Must Watch!) - Изучайте разговорный английский по видео

We have seen deadlock example.

We have given the example of the lock.

But we are going to read deadlock officially.

I will give you a example of how the code looks.

We will see deadlock doesn't work.

We will see how it will resolve.

First of all, what is formal definition?

In multi-threading, deadlock is a situation where the threats are always blocked.

And they depend on the other side.

For example, A and B, A has a pen and a paper.

A waits for B, when he gives a paper, then I start to write.

B waits for A, when he gives a pen, then I start to write.

Just, nothing is wrong.

One is waiting for another.

So, the work will not be wrong and wait for forever.

So, this is a condition called deadlock.

Formal, formal.

Formal, when it comes to match, the deadlock is called.

Mutual exclusion.

Sir, our critical section is called, which should be locked.

First thing is obvious.

Then there will be a wait.

Another thing is, Hold and wait.

A thread holding at least one resource is waiting to acquire.

Obviously.

Third thing is no preemption.

You can't remove pen or pencil.

You can't remove paper.

We haven't read this yet.

It's circular wait.

This is obvious.

The obvious thing is, they divide in 4 parts.

It's false.

But obviously, if someone's mind is bad, then they can ask.

Okay, sir.

So, theory has happened.

Sir, a real life example.

I have given you a class pen and a class paper.

What is written in pen?

Write with pen and paper.

It is a method.

It is called paper.finishedWriting.

Another class is class paper.

It is called write with write with paper and pen.

And then finish writing method.

I am going to show you the functionality.

What is written in the upper part?

I will go in the upper part.

I will make two threads.

Task 1.

The next thread is task 2.

In the main thread, a pen and a paper and the threads are made.

Then I will start.

I am giving a high level overview.

Thread 1 is using pen and is trying to use paper.

Thread 2 is using paper and trying to use pen.

And it's going infinitely.

I will close it to forcefully.

The condition is the same.

Two threads have two people.

One has pen and trying to use paper.

The other one has B.

The other one has paper and trying to use pen.

The solution is not coming.

This is deadlock.

Now, look at the code.

There are two methods, paper, and two threads.

Task 1 and Task 2.

We will create the object in that two objects.

Pen and paper.

Similarly with Task 2.

When we create the object in Task 2, we will create the object in the constructor.

Obviously, one pen will be and one paper.

So, two people are.

Thread 1 and Thread 2.

There are two things.

One pen and one paper.

Thread 1 is written in the first one.

One person has pen.

Pen.Write with pen and paper.

The other person has paper.

Now we are going to pen and paper class.

Pen has two methods.

Write with pen and paper and finish writing.

Paper has two methods.

Write with paper and pen and finish writing.

Pen has been written in thread 1.

Synchronize is put.

When a method is declared by synchronized keyword,

this method will acquire the intrinsic lock of the object the method belongs to.

Pen will acquire the method.

And then, paper.finish writing.

This method will need paper and pen,

so it comes to paper and pen.

and he is trying to run pen.finish writing.

When will it run pen?

When it has a pen lock.

What do you mean?

100

It depends on the other one.

101

What is thread 1?

102

It has a pen.

103

And trying to use paper.

104

Similarly thread 2 is using paper and trying to use pen.

105

But nothing is happening.

106

Then we close it.

107

What is deadlock?

108

If it has not been done, then see it again.

109

I am saying it again.

110

Now I need to resolve this, I need to resolve this, deadlock is not necessary.

111

So what can I do?

112

There are many strategies.

113

What is common approach?

114

Ensure that all the threats are consistent order to acquire locks.

115

Consistent order means that multiple threats which are required to acquire locks and multiple resources,

116

they should always acquire the resources in the same sequence.

117

Class pen and paper Here is the lock acquired.

118

What is the lock?

119

The pen and paper are the same.

120

We will do the same work.

121

If we change the lock, then the result will be deadlock.

122

Now, Task 1 is going to lock pen and paper.

123

Task 2 is going to lock pen and pen.

124

What do we do?

125

We use the synchronized keyword.

126

We want to lock and pen.

127

We will say Task 2 is going to lock pen and pen.

128

Then, paper can lock.

129

This is the two things.

130

I will put it here.

131

It will make sure that thread 2 is going to lock pen.

132

When you have pen lock, it's a good thing.

133

But pen lock is a thread 1, no matter what you will do.

134

And paper lock will come, because thread to run not.

135

Because thread to run, you should have pen lock, then paper lock will acquire.

136

So, understand how now.

137

If we change ordering, consistent ordering,

138

lock will acquire, we can resolve the deadlock.

139

Okay?

140

Now, keep the tension so much.

141

Keep the tension so much.

142

Sir, we have a small example which we have resolved.

143

That's it.

144

Keep the tension so much.

145

Keep the tension so much.

146

Okay, sir.

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Этот видеоролик поможет вам улучшить навык объяснения технических концепций простым языком, что критически важно для практики разговорного английского. Вы научитесь структурировать мысли, используя логические последовательности ("сначала", "затем", "например") и объяснять сложные термины на примерах. Это отличная тренировка для тех, кто хочет учить английский с YouTube, так как материал сочетает теорию и практику.

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"deadlock is a situation where the threads are always blocked" – "взаимная блокировка — это ситуация, когда потоки постоянно блокируются"
"depends on the other side" – "зависит от другой стороны"
"holding at least one resource is waiting to acquire" – "удерживая как минимум один ресурс, ожидает получения другого"
"real life example" – "пример из реальной жизни"
"show you the functionality" – "покажу вам функциональность"

Эти фразы универсальны и подойдут для обсуждения не только программирования, но и других областей, где нужно объяснить взаимосвязи между элементами.

Исправьте свои слабые места

Особое внимание уделите произношению слов с длинными слогами: "mutual exclusion" (взаимное исключение), "preemption" (вытеснение), "circular wait" (циклическое ожидание). Для улучшения произношения английского используйте технику shadowspeaks: повторяйте фразы после спикера, копируя его интонацию и ритм. Обратите внимание на паузы между словами в сложных предложениях — они помогают сделать речь более понятной. Практикуйте каждый пример по 5–7 раз, пока не почувствуете уверенность. Это эффективный способ учить английский с YouTube, так как вы работаете с живой речью в контексте.

Грамматика в этом видео

Конструкции, которые говорящий использует чаще всего, с точными словами из видео:

Конструкция	В видео
Пассивный залог be + причастие прошедшего времени — важно, что происходит, а не кто это делает	are always blocked · is called · is written
Present Perfect have/has + причастие прошедшего времени — прошлое действие, важное сейчас	have seen · have given · haven't read

Что такое техника Shadowing?

Shadowing — это научно обоснованная техника изучения языка, изначально разработанная для подготовки профессиональных переводчиков и популяризированная полиглотом доктором Александром Аргуэльесом. Метод прост, но эффективен: вы слушаете аудио на английском от носителей языка и немедленно повторяете вслух — как тень, следующая за говорящим с задержкой в 1–2 секунды. В отличие от пассивного прослушивания или грамматических упражнений, Shadowing заставляет мозг и мышцы рта одновременно обрабатывать и воспроизводить реальные речевые паттерны. Исследования показывают, что это значительно улучшает точность произношения, интонацию, ритм, связную речь, понимание на слух и беглость речи — что делает его одним из самых эффективных методов для подготовки к IELTS Speaking и реального общения на английском.

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Практика Shadowing: 🚫 Java Deadlock Explained: Why Your Code is Stuck 😱 (Beginners Must Watch!) - Изучайте разговорный английский по видео

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Грамматика в этом видео

Что такое техника Shadowing?