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Java Academy · Lesson

Common Pitfalls

Avoid frequent mistakes with Streams: reusing streams, hidden side effects, and parallel + mutable state.

Intro

Streams are powerful, but there are pitfalls: reusing a Stream, hidden side effects, and mixing parallel with mutable state.

One-shot streams

A Stream is one-shot: after a terminal operation (forEach, collect, reduce) it cannot be used again.

All lessons in this course

  1. Ordering & Short-circuiting
  2. Parallel Streams Basics
  3. Common Pitfalls
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