Shadowing-Übung: 🚫 Java Deadlock Explained: Why Your Code is Stuck 😱 (Beginners Must Watch!) - Englisch Sprechen Lernen mit Video

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We have seen deadlock example.
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We have given the example of the lock.
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But we are going to read deadlock officially.
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I will give you a example of how the code looks.
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We will see deadlock doesn't work.
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We will see how it will resolve.
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First of all, what is formal definition?
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In multi-threading, deadlock is a situation where the threats are always blocked.
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And they depend on the other side.
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For example, A and B, A has a pen and a paper.
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A waits for B, when he gives a paper, then I start to write.
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B waits for A, when he gives a pen, then I start to write.
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Just, nothing is wrong.
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One is waiting for another.
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So, the work will not be wrong and wait for forever.
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So, this is a condition called deadlock.
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Formal, formal.
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Formal, when it comes to match, the deadlock is called.
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Mutual exclusion.
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Sir, our critical section is called, which should be locked.
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First thing is obvious.
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Then there will be a wait.
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Another thing is, Hold and wait.
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A thread holding at least one resource is waiting to acquire.
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Obviously.
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Third thing is no preemption.
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You can't remove pen or pencil.
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You can't remove paper.
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We haven't read this yet.
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It's circular wait.
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This is obvious.
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The obvious thing is, they divide in 4 parts.
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It's false.
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But obviously, if someone's mind is bad, then they can ask.
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Okay, sir.
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So, theory has happened.
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Sir, a real life example.
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I have given you a class pen and a class paper.
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What is written in pen?
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Write with pen and paper.
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It is a method.
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It is called paper.finishedWriting.
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Another class is class paper.
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It is called write with write with paper and pen.
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And then finish writing method.
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I am going to show you the functionality.
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What is written in the upper part?
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I will go in the upper part.
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I will make two threads.
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Task 1.
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The next thread is task 2.
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In the main thread, a pen and a paper and the threads are made.
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Then I will start.
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I am giving a high level overview.
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Thread 1 is using pen and is trying to use paper.
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Thread 2 is using paper and trying to use pen.
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And it's going infinitely.
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I will close it to forcefully.
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The condition is the same.
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Two threads have two people.
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One has pen and trying to use paper.
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The other one has B.
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The other one has paper and trying to use pen.
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The solution is not coming.
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This is deadlock.
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Now, look at the code.
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There are two methods, paper, and two threads.
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Task 1 and Task 2.
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We will create the object in that two objects.
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Pen and paper.
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Similarly with Task 2.
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When we create the object in Task 2, we will create the object in the constructor.
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Obviously, one pen will be and one paper.
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So, two people are.
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Thread 1 and Thread 2.
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There are two things.
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One pen and one paper.
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Thread 1 is written in the first one.
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One person has pen.
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Pen.Write with pen and paper.
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The other person has paper.
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Now we are going to pen and paper class.
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Pen has two methods.
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Write with pen and paper and finish writing.
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Paper has two methods.
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Write with paper and pen and finish writing.
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Pen has been written in thread 1.
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Synchronize is put.
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When a method is declared by synchronized keyword,
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this method will acquire the intrinsic lock of the object the method belongs to.
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Pen will acquire the method.
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Pen will acquire the method.
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And then, paper.finish writing.
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This method will need paper and pen,
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so it comes to paper and pen.
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and he is trying to run pen.finish writing.
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When will it run pen?
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When it has a pen lock.
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What do you mean?
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It depends on the other one.
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What is thread 1?
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It has a pen.
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And trying to use paper.
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Similarly thread 2 is using paper and trying to use pen.
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But nothing is happening.
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Then we close it.
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What is deadlock?
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If it has not been done, then see it again.
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I am saying it again.
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Now I need to resolve this, I need to resolve this, deadlock is not necessary.
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So what can I do?
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There are many strategies.
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What is common approach?
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Ensure that all the threats are consistent order to acquire locks.
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Consistent order means that multiple threats which are required to acquire locks and multiple resources,
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they should always acquire the resources in the same sequence.
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Class pen and paper Here is the lock acquired.
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What is the lock?
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The pen and paper are the same.
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We will do the same work.
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If we change the lock, then the result will be deadlock.
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Now, Task 1 is going to lock pen and paper.
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Task 2 is going to lock pen and pen.
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What do we do?
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We use the synchronized keyword.
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We want to lock and pen.
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We will say Task 2 is going to lock pen and pen.
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Then, paper can lock.
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This is the two things.
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I will put it here.
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It will make sure that thread 2 is going to lock pen.
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When you have pen lock, it's a good thing.
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But pen lock is a thread 1, no matter what you will do.
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And paper lock will come, because thread to run not.
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Because thread to run, you should have pen lock, then paper lock will acquire.
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So, understand how now.
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If we change ordering, consistent ordering,
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lock will acquire, we can resolve the deadlock.
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Okay?
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Now, keep the tension so much.
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Keep the tension so much.
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Sir, we have a small example which we have resolved.
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That's it.
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Keep the tension so much.
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Keep the tension so much.
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Okay, sir.
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Was du in dieser Lektion lernst

In diesem Video erfährst du nicht nur, was ein Deadlock in Java ist – du übst auch gleichzeitig dein Englisch! Du wirst lernen, technische Begriffe zu verstehen, die Struktur von Erklärungen zu erkennen und wie man komplexe Themen einfach darstellt. Perfekt fürs Shadowing, denn die Sprache ist klar, langsam und mit Beispielen versehen – ideal, um deinen Sprachfluss und dein Verständnis zu verbessern.

Wichtige Vokabeln & Sätze

  • Deadlock: Ein Zustand, in dem Threads blockiert sind und sich gegenseitig warten.
  • Multi-Threading: Die Ausführung mehrerer Threads gleichzeitig in einem Programm.
  • Critical section: Ein Code-Bereich, der nur von einem Thread auf einmal ausgeführt werden kann.
  • "Threads are always blocked": "Threads sind ständig blockiert" – eine häufige Formulierung in technischen Erklärungen.
  • "Hold and wait": "Halten und warten" – eine der Bedingungen für einen Deadlock.

Tipps fürs Shadowing

Das Video eignet sich hervorragend fürs Englisch Shadowing, weil die Sprecherin langsam und deutlich spricht. Versuche, direkt nach ihr zu sprechen – nur einen halben Schritt hinter ihr. Achte auf die Betonung von Wörtern wie "deadlock" oder "mutual exclusion" – das hilft dir, die wichtigsten Informationen zu markieren. Wenn du an komplexeren Sätzen hängst, pausiere und wiederhole sie Stück für Stück. Nutze die Beispiele (wie das mit dem Stift und Papier) als Chance, deine Intonation zu üben – mache deutlich, wann du eine Erklärung oder ein Beispiel gibst. Mit diesem shadowing site-Fokus wirst du nicht nur dein Hörverständnis verbessern, sondern auch lernen, technische Inhalte selbst zu vermitteln. Probier's aus – shadowspeaks wirklich effektiv, wenn du konsequent übst!

Was ist die Shadowing-Technik?

Shadowing ist eine wissenschaftlich fundierte Sprachlerntechnik, die ursprünglich für die professionelle Dolmetscherausbildung entwickelt und durch den Polyglotten Dr. Alexander Arguelles populär gemacht wurde. Die Methode ist einfach aber wirkungsvoll: Du hörst englisches Audio von Muttersprachlern und wiederholst es sofort laut — wie ein Schatten, der dem Sprecher mit nur 1–2 Sekunden Verzögerung folgt. Anders als passives Hören oder Grammatikübungen zwingt Shadowing dein Gehirn und deine Mundmuskulatur, gleichzeitig echte Sprachmuster zu verarbeiten und zu reproduzieren. Studien zeigen, dass es Aussprachegenauigkeit, Intonation, Rhythmus, verbundene Sprache, Hörverständnis und Sprechflüssigkeit signifikant verbessert — was es zu einer der effektivsten Methoden für die IELTS Speaking-Vorbereitung und reale englische Kommunikation macht.

Shadowing-Technik: die vollständige Schritt-für-Schritt-Anleitung lesen →