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Which method is called when a thread starts executing?

Question

Which method is called when a thread starts executing?

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Solution

The method that is called when a thread starts executing is the run() method. Here are the steps that usually happen:

  1. An instance of a class is created that implements the Runnable interface or extends the Thread class.
  2. The run() method is overridden with the code that is needed to be executed in a separate thread.
  3. An instance of the Thread class is created and the object from step 1 is passed as an argument to the constructor.
  4. The start() method is called on the Thread instance. This method is responsible for creating a new thread and calling the run() method on the Runnable object or Thread subclass.

It's important to note that calling the run() method directly will not create a new thread and the code will be executed in the current thread.

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