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What happens if the run() method in a Thread class is not overridden?

Python/Codingeasy0.4 min readPremium
Frequency
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Asked at 1 company
Category
179
questions in Python/Coding
Difficulty Split
127E|24M|28H
in this category
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1,863
across 7 categories
Asked at these companies
JP Morgan
Expert AnswerPremium
79 wordsInterview-ready
**Default Thread.run():** Calls the Runnable's run() if constructed with Runnable. If you extend Thread and don't override run(), and pass no Runnable, run() does nothing—thread starts and exits immediately. **Why It Matters:** Silent no-op—hard to debug. Always override run() when extending Thread, or pass Runnable to constructor (preferred—avoids inheritance). **Production:** Prefer ExecutorService + Runnable over raw Thread....
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