java-8

Idiomatic Java ways to count specific characters like dots in strings without loops: streams, replace tricks, regex. Efficient one-liners for 'a.b.c.d' yielding 3, with performance tips and best practices for Java strings.

Learn the most efficient way to iterate over Java Map entries using entrySet(), Java 8 forEach, and streams. Avoid keySet() lookups for better performance. Covers HashMap ordering and safe removal.