Java's I/O streams provide standardized ways to read and write data. Any object representing a mutable data source in Java exposes methods for reading and writing its data as a stream.

Q: Does the JExcelAPI library contain any demos? A: JExcelAPI’s jexcelapi home directory contains a jxl.jar file that contains demos for reading, writing, and copying spreadsheets.

Java 23, now generally available, includes previews of module import declarations, stream gatherers, structured concurrency, scoped values, and a class-file API. And much more.