Tag: Tutorial

Use interfaces with a single abstract method as lambda targets.

Process collections declaratively with map, filter, and reduce.

Handle missing values with Optional instead of returning null.

Work with modern java.time types: LocalDate, LocalDateTime, and Duration.

Create, read, and write files with java.nio.file and IO APIs.

Read text files fully or line-by-line and append content safely.

Convert objects to byte streams with Serializable (and know safer alternatives).

Define a fixed set of constants with enum types.

Store dynamic lists with ArrayList for fast random access.

Use LinkedList for frequent insert/remove at ends or as a deque.