链接：https://pan.baidu.com/s/1K-RE4PMn1yhY6wbMGtuAwg 

提取码：ckmo 

 

To the Reader

The book you have in your hands is the second volume of the eleventh edition

of Core Java, fully updated for Java SE 11. The first volume covers the essential

features of the language; this volume deals with the advanced topics that a

programmer needs to know for professional software development. Thus, as

with the first volume and the previous editions of this book, we are still tar￾geting programmers who want to put Java technology to work in real projects.

As is the case with any book, errors and inaccuracies are inevitable. Should

you find any in this book, we would very much like to hear about them. Of

course, we would prefer to hear about them only once. For this reason, we

have put up a web site at http://horstmann.com/corejava with a FAQ, bug fixes, and

workarounds. Strategically placed at the end of the bug report web page (to

encourage you to read the previous reports) is a form that you can use to

report bugs or problems and to send suggestions for improvements for future

editions.

About This Book

The chapters in this book are, for the most part, independent of each other.

You should be able to delve into whatever topic interests you the most and

read the chapters in any order.

In Chapter 1, you will learn all about the Java stream library that brings a

modern flavor to processing data, by specifying what you want without de￾scribing in detail how the result should be obtained. This allows the stream

library to focus on an optimal evaluation strategy, which is particularly

advantageous for optimizing concurrent computations.

The topic of Chapter 2 is input and output handling (I/O). In Java, all input

and output is handled through input/output streams. These streams (not to

be confused with those in Chapter 1) let you deal, in a uniform manner, with

communications among various sources of data, such as files, network con￾nections, or memory blocks. We include detailed coverage of the reader and

xv

ptg27506709

writer classes that make it easy to deal with Unicode. We show you what

goes on under the hood when you use the object serialization mechanism,

which makes saving and loading objects easy and convenient. We then move

on to regular expressions and working with files and paths. Throughout this

chapter, you will find welcome enhancements in recent Java versions.

Chapter 3 covers XML. We show you how to parse XML files, how to generate

XML, and how to use XSL transformations. As a useful example, we show

you how to specify the layout of a Swing form in XML. We also discuss the

XPath API, which makes finding needles in XML haystacks much easier.

Chapter 4 covers the networking API. Java makes it phenomenally easy to

do complex network programming. We show you how to make network

connections to servers, how to implement your own servers, and how to

make HTTP connections. This chapter includes coverage of the new HTTP

client.