Exploring Java 9: Build Modularized Applications in Java

© Fu Cheng 2018

Fu ChengExploring Java 9https://doi.org/10.1007/978-1-4842-3330-6_12

12. I/O

Fu Cheng¹ 

(1)

Auckland, New Zealand

 

This chapter covers the changes to the java.io package in Java 9.

InputStream

The class java.io.InputStream adds three methods for reading and copying data from the input stream .

• readAllBytes() : Reads all remaining bytes from the input stream.
• readNBytes (byte[] b, int off, int len): Reads the given number of bytes from the input stream into the given byte array b. offset is the reading position, while len is the number of bytes to read.
• transferTo (OutputStream out): Reads all bytes from the input stream and writes to the given output stream.

In Listing 12-1, the file input.txt contains the content “Hello World”. ...