Answer
peek is an intermediate operation for debugging.
Lets you inspect elements without modifying them.
Not intended for business logic.
Lets you inspect elements without modifying them.
Not intended for business logic.
Quick Answer
peek() is an intermediate operation that performs a side effect (like logging) for each element as it passes through, then passes the element unchanged to the next stage. Useful for debugging: stream.filter(x -> x > 0).peek(x -> log(x)).map(x -> x * 2). Don't use peek() to modify elements (it's for inspection only). Not guaranteed to run in all cases if terminal op short-circuits.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ