Why is String immutable in Java?
Explain the reasons with examples.
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- Why is String immutable in Java?
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Immutability makes String thread-safe and safe to use as HashMap keys (hashCode is cached).
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String objects are cached in the String pool; immutability makes sharing them safe.
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A repeated question row simply adds more answers to the same question.
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Security: class names and file paths passed as strings cannot be changed after validation.
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Performance: hash code caching.
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