https://aamernabi.github.io/tags/streams/ Recent content in Streams on Aamer Paul Hugo en-us Mon, 07 Jun 2021 18:12:23 +0530 https://aamernabi.github.io/posts/deep-dive-into-java-stream-api/ Mon, 07 Jun 2021 18:12:23 +0530 https://aamernabi.github.io/posts/deep-dive-into-java-stream-api/ <p>The <strong>Stream API</strong>, introduced in Java 8, is a powerful tool for processing sequences of elements. It provides a functional approach to working with collections and arrays, allowing for expressive and efficient data manipulation. Streams don&rsquo;t store data; instead, they operate on a data source, such as a <code>Collection</code> or an array, and enable aggregate operations.</p> <h2 id="core-concepts">Core Concepts</h2> <p>A stream pipeline consists of three parts:</p> <ol> <li><strong>A source</strong>: Where the stream originates from (e.g., a <code>List</code>, <code>Set</code>, or array).</li> <li><strong>Zero or more intermediate operations</strong>: These transform the stream into another stream. Examples include <code>filter</code>, <code>map</code>, and <code>sorted</code>.</li> <li><strong>A terminal operation</strong>: This produces a result or a side-effect, and triggers the execution of the pipeline. Examples include <code>forEach</code>, <code>collect</code>, and <code>reduce</code>.</li> </ol> <p>One of the key features of streams is <strong>laziness</strong>. Intermediate operations are not executed until a terminal operation is invoked. This allows the Stream API to optimize the execution of the pipeline.</p>