feat: add streams concept #2983
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Hey @navaneedan07, @jagdish-15 has commented in #2982 to create a forum post for this one. Assuming the streams concept is added, we should also add a concept exercise to give students the chance to practice using it.
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| # Introduction | |||
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| Imagine you’re at an airport, watching suitcases glide past on a conveyor belt. You don’t grab every bag—you scan for yours, maybe sort by color or tag, and pick only what you need. That’s how Java Streams work. | |||
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I like the use of the analogy! Just one thing - each sentence should be on a new line (see our paragraph specification).
| Imagine you’re at an airport, watching suitcases glide past on a conveyor belt. You don’t grab every bag—you scan for yours, maybe sort by color or tag, and pick only what you need. That’s how Java Streams work. | |
| Imagine you’re at an airport, watching suitcases glide past on a conveyor belt. | |
| You don’t grab every bag—you scan for yours, maybe sort by color or tag, and pick only what you need. | |
| That’s how Java Streams work. |
| Streams are part of Java’s functional programming toolkit. They help you write code that’s: | ||
| - **Declarative** – Focused on intent, not mechanics. | ||
| - **Composable** – Easy to chain operations. | ||
| - **Lazy** – Efficient by computing only when needed. | ||
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| Once you start using streams, you’ll find yourself writing fewer loops and more elegant pipelines. It’s not just cleaner—it’s fun. |
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We should avoid promoting streams over for loops here. Generally, the introduction should focus on how to use streams (see introducton.md docs), not what they offer. I'd recommend having a look at existing concept introductions like lists, datetime or randomness.
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| # About | |||
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Generally, the about.md follows the introduction.md, although it can also have more information. See the about.md documentation or the lists, datetime or randomness for examples.
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| "url": "https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html", | |||
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The track targets Java 21 and older, but these links are specifically for Java 8. Have there been any significant changes to this package since 8?
pull request
Closes #2982
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