Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

stream

A sequence of elements flowing through a chain of operations; it stores nothing and never changes its source.

java.util.stream.Stream, a possibly lazy, single-use sequence supporting intermediate and terminal aggregate operations; not a collection.

Examples

  • orders.stream().filter(o -> o.total() > 100).count()

See also

stream pipeline intermediate operation terminal operation
Read the full section →