<ul><li>Java Streams, introduced in Java 8, revolutionized how developers work with collections and functional-style operations.</li><li>1. Using Intermediate Operations Without a Terminal Operation: Always end the stream with a terminal operation to execute it.</li><li>2. Overusing collect(Collectors.toList()): If you don’t need the resulting list, skip collect() and use forEach() directly.</li><li>3. Ignoring Stream Reuse Rules: Convert streams into a collection or supplier if you need to reuse them.</li><li>4. Overusing Parallel Streams: Use parallelStream() only for large datasets or tasks where parallel execution benefits outweigh the overhead.</li><li>5. Using Stream Operations for Side Effects: Use forEach() for side effects and keep map() for pure transformations.</li></ul>

5 Common Mistakes in Java Streams and How to Avoid Them

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