Class StreamGatherersPreviewNotes

java.lang.Object
net.jrodolfo.java_evolution.java22.stream_gatherers.StreamGatherersPreviewNotes
public class StreamGatherersPreviewNotes extends Object
Explains Stream Gatherers, introduced as a Java 22 preview feature.

Streams already had many built-in intermediate operations, such as map, filter, and limit. Some transformations were still awkward because they needed buffering, state, or a custom rule for when to emit output elements. Gatherers were introduced as a standard extension point for those custom intermediate stream operations.

This Java 22 package keeps the feature explanatory because gatherers were still preview in Java 22. The final runnable example lives in the Java 24 package, where Stream Gatherers became final.

  • Constructor Details

    • StreamGatherersPreviewNotes

      public StreamGatherersPreviewNotes()

  • Method Details

    • problemSolved

      public String problemSolved()
      Explains the central problem.
      Returns:
      a short explanation

    • whatJavaIntroduced

      public String whatJavaIntroduced()
      Explains the central API idea.
      Returns:
      a short explanation

    • exampleUseCases

      public String exampleUseCases()
      Names transformations that show why gatherers are useful.
      Returns:
      example transformations

    • previewStatus

      public String previewStatus()
      Explains the preview status.
      Returns:
      a short preview-status note

    • nextStep

      public String nextStep()
      Points learners to the final Java 24 example.
      Returns:
      a short next-step note