Java.io is the main package for most stream-oriented I/O classes. This package presents two abstract classes, InputStream and OutputStream . All other stream-oriented I/O classes extend these base ...

NIO.2, which was introduced in JDK 7, extends Java’s non-blocking I/O libraries to add support for filesystem tasks, such as the java.nio.file package and java.nio.file.Path class and exposes a ...

This is not to be confused with java.io package’s InputStream and OutputStream — it’s a separate concept altogether. Streams are not meant to replace ArrayLists or other collections.