Java2认证考试学习指南（英文原版） 下载 pdf 电子版 epub 免费 txt 2025

For a while it didn＇t seem to be moving at all, and I wondered if it ever would. Then it moved forward a few steps. wobbly but at least making progress. Then it was definitely on the move, and th

Introduction

Part I The Programmer's Exam

Chapter 1 Language Fundamentals

Source Files

Keywords and Identifiers

Primitive Data bees

Literals

boolean Literals

char Literals

IntegraI Literals

Floating--Point Literals

String Literals

Arrays

Class Fundamentals

The mairt() Method

Variables and Initialization

Argument Passing

Garbage Collection

Chapter Summary

Test Yourself

Chapter 2 Operators and Assignments

Evaluation Order

The Unary Operators

The Increment and Decrement Operators: ++ and --

The Unary Plus and Minus Operators: + and -

The Bitwise Inversiori Operator: ~

The Boolean Complement Operator: !

The Cast Operator: (type)

The Arithmetic Operators

The Multiplication and Division Operators: * and /

The Modulo Operator: %

The Addition and Subtraction Operators: + and --

Arithmetic Error Conditions,

The Shift Operators: >, and >>>

Fundamentals of Shifting

Shifting Negative Numbers,

Reduction of the Right Operand

Arithmetic Promotion of Operands

The Comparison Operators

Ordinal Comparisons with , and >=

The thetanceof Operator

The Equality Comparison Operators: == and !=

The Bitwise Operators: &, ^, and l

Boolean Operations

The Short-Circuit Logical Operators

The Conditional Operator: ?:

The Assignment Operators

An Assgument Has Value

Chapter Summary

The Unary Operators

The Arithmetic Operators

The Shift Operators

The Bitwise Operators

The Assignment Operators

Test Yourself

Chapter 3 Modmers

Modifier Ovefview

The Access Modifiers

public

Prtvate

Default

protected

Subclasses and Method Privacy

Summary of Access Modes

Other Modifiers

final

abstract

static

Static Initializers

native

transient

synchronised

volatile

Modifiers and Features

Chapter Summary

Test Yourself

Chapter 4 Converting aud Casting

ExPlicit and Implicit toe Changes

Primltives and Conversion

Primitive Conversion: Assignment

Assignment Conversion, Little Primitives, and Literal Values

Primitive Conversion: Method Call

Primitive Conversion: Arithmetic Promotion

Primitives and Casting

Object Reference Conversion

Object Reference Assignment Conversion

Object Method--Call Conversion

Object Reference Casting

Chapter Summary

Test Yourself

Chapter 5 Flow Coutrol and Exceptious

The Loop Constructs

The while() Loop

The do Loop

The for() Loop

The break and conttnue Statements in Loops

The Selection Statements

The if()/else Construct

The switch() Construct

Exceptions

Flow of Control in Exception Conditions

Throwing Exceptions

Chapter Summary

Loop Constructs

Selection Statements

Flow in Exception Handling

Exception Throwing

Test Yourself

Chapter 6 Objects and Classes

Benefits of Object--Oriented Implementation

Abstract Data Types

Reuse

Implementing Object--Oriented Relationships

Overioading and Overriding

Overloading Method Names

Method Overriding

Constructors and Subclassing

Overloading Constructors

Inner Classes

The Enclosing this Reference and Construction of Inrier Classes

Member Classes

Classes Defined Inside Methods

Chapter Summary

Object-Oriented Design and Implementation

Overloading and Overriding

Constructors and Subclassing

lnner Classes

Test Yourself

Cbapter 7 Threads

Thread Fundamentals

What a Thread Executes

When Executlon Ends

Thread States

Thread Priorities

Controlling Threads

Yielding

Suspending

Sleeping

Blocking

Monitor States

Scheduling Implementations

Monitors, wait(), and notify()

The Object Lock and Synchronization

wait() and natify()

The Class Lock

Beyond the Pure Model

Deadlock

Strange Ways to Srochronize

Chapter Summary

Test Yourself

Chapter 8 The jasa.lang and java.util Packnges

The Object Class

The Math Class

The Wrapper Classes

Strings

The String Class

The StrtingBuffer Class

String Concatenation the Easy Way

The Collections API

Collection Types

Collection Implementations in the API

Collections and Code Maintenance

Summary of Collections

Chapter Summary

Test Yourself

Chapter 9 Layout Managers

Why Java Uses Layout Managers

How Layout Managers Solve the Problem

Layout Manager Theory

Contalners and Components

Component Size and Position

Layout Policies

The Flow Layout Manager

The Grid Layout Manager

The Border Layout Manager

The Card Layout Manager

The GridBag Layout Manager

Controlling the Cell Size fOr a Component

GridBag's Shorthand

Other Layout Options

Improving Your Chances

Chapter Summary

Test Yourself

Chapter 1O Events

Mothation for the Event Delegation Model

The Event Class Hierarchy

Semantic Events

Event Listeners

ExPlicit Event Enabling

Adapters

Action Commands

Chapter Summary

Test Yourself

Cbapter 11 Components

Components in General

getSise()

setForegrourtd() and setBackground()

setFont()

seocnabled()

setSize() and setBounds()

setVisible()

The Visual Components

Button

Canvas

Checkbox

Choice

FileDialog

tobel

List

ScrouPane

Scrollbar

TextFiesd and TextArea

The Container Components

Applet

Frame

Panel

Dialog

The Menu Components

Chapter Summary

Test Yourself

Chapter 12 Painting

The Paint() Method and the Graphics Context

Selecting a Color

Selecting a Font

Drawing and Filling

Clipping

Painting a Contained Component

The GUI Thread and the rePaint() Method

Spontaneous Painting

The repatnt() Method

Images

Double Buffering Using Images

Chapter Summary

Test Yourself

Chapter 13 Iuput and Output

File Input and Output

Text Representation and UTF

The File Class

The RandowtccessFile Class

Streams, Readers, and Writers

Low-Level Streams

High-Level Filter Streams

Readers and Writers

Encodings

Object Streams and Serialization

Sockets

Chapter Summary

Test Yourself

part II The Developer's Exam

Chapter 14 Taking the Developer's Exam

Are You Ready for the Exam?

Formalities of the Exam

Downloading the Assignment

Taking the Follow-up Exam

What the Assignment Covers

How the Assignment and Exam Are Graded

JDK l.2 Specifics

Cbapter 15 Assignmeut: Room Reservation System

Structure of the Assignment

Business Scenario

Project Specifics

Code and APIs Provided

Functional Goals

Write a User Interface

Enable Network Access (Client--Server)

Add Features to an Existing Database

Other Requirements

Adhere to Supplied Naming

Stress Readability

Usejavadoc-Style Comments

Chapter 16 Enhancing and Extending tbe Database

Two--Tier Databases

Designing a Basic Scheme

Using Interfaces

Using Abstract Classes

Issues in Implementation

Exception Handling

Desmp Impediments

Thread Safety

Supporting New Features

Chapter Summary

Chapter 17 wntiug the Network Protocol

Client--Server from Scratch

Server Operation

Connecting Clients to the Server

Communications Protocol

The Client/Request Structure

Limitations of the Model

Remote Method Invocation (RMI)

A Model RMI Transaction

Implementing RMI

Limitations of RMI

More on Threads

Sharing Threads

ChaPter Summary

Cbapter 18 Designing the User 1nterface

Defining the GUI's Requirements

Identifying Needed Components

Sketching the GUI

Isolating Regions of Behavior

Choosing Layout Managers

Using Swing

Tables

Lists

Using Layout Managers

CardLayout

GridBagLayout

Event Handling and Style

Event Handling and Threads

Chapter Summary

Chapter 19 A Second Example: A Trouble-Ticket System

More on Exam Requirements

Assmpment: Build a Trouble-Ticket System

GUI Development

Database/Server Development

Client--Server Logic

Delivering the Finished Assignment

Chapter 2O GUI Prototyping

Events and Properties

Building a JTable

Using AbstractTableModel ,

Building a JTree

Mnas, JButtons, and Actioris

Panes

JSplitPane

JOptionPane

Final Thoughts on Code Style '

Cbapter 21 Bullding the Database Server

Database Requirements

Implementing RMI

Exporting with UnicastRemoteObject

EXporting an Acttvatable Object

Record Locking

Chapter Summary

Cbapter 22 Connecting Client and Server

Notification Basics

Using JavaBean Conventions

Event Adapters

Remote Notification

Using Distributed Notification

Chapter Summary

Chapter 23 Preparlng the Upload

Submission Requirements

Usingjavadoc

File Structure

writing the README file

Using the jar Tool

Chapter Summary

Cbapter 24 Thinking About the Follow-Up Exam

Preparation Questions

What are the choices for data structures?

Is implementing Runnable better than extending Thread?

Isn't comparlng obect serialization to RMI an apples-to-oranges analysis?

How elaborate should an exception class structure get?

How many ways can you set up "listener" relationships?

Which one is best?

How do I know which layout manager to use?

Which design patterns are most useful in this

kind of project? "

When does it make sense to use protected and default scope?

Doesn't an abstract class let the developer specify more

behavior than an interface?

Chapter Summary "

Part III Appendices

Appendix A Answers to Test Yourself Questions

Appendix B Programmer's Finai Exam

Appeudix C Using the Test Program

The Real Test

The Supporting Instructions

The Tester

Running the Tester

Imposing a Time Limit

Answering the guestions

Appendix D The Certification Iuitiative for Enterprise Development

The Structure of the Initiative

The Second--Level Exams

The Common Exam at Level II

The Vendor-Specific Exams at Level II

Other Vendor Exams at Level II

The Third--Level Exams

The Common Exam at Level IIl

The Vendor-Specific Exams at Level lII

Other Vendor Exams at Level III

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书籍介绍

For a while it didn＇t seem to be moving at all, and I wondered if it ever would. Then it moved forward a few steps. wobbly but at least making progress. Then it was definitely on the move, and th

• 作者：consumee 发布时间：2019-04-04 08:28:54

  读起来很爽

• 作者：小透明 发布时间：2022-06-02 09:01:28

  不是我喜欢的风格，但叙事很厉害，立意离我生活太远，实在带入不了。

• 作者：woodman 发布时间：2009-01-20 13:33:08

  2009.01.20

• 作者：糯米团子 发布时间：2012-05-14 12:24:46

  博塔在几何形体和光影表现上实在是牛逼到了一定的境界……书中照片儿拍的很好看，不过编纂的有些不专业，平立剖都不全啊……

• 作者：pubb 发布时间：2014-03-06 22:55:13

  买了本盗版。

• 作者：Heather 发布时间：2021-08-26 15:23:30

  书本的编辑上有一点点小错误，但是里面的内容很有意思，中国的老话儿有许多都有些小典故小故事的讲解，理解更加源远流长。

• 生老病死是人间常事，怎么没有人教过我们如何从容地老去。

  作者：莫茉 发布时间：2019-10-30 11:48:07

  

  《门罗先生的普普人生》

  我们希望自己能永葆青春，长生不老，害怕苍老，哪怕是安慰自己说，像我们这样的人，老了也会很可爱，只是依旧会害怕，苍老的到来。

  电视剧电影里讲述老人的部分，我总是会跳过，年轻的时候是因为不以为然，而现在是不敢去看，而自媒体的兴起，美容院、整形医院的发达，各类抗衰产品的热卖，似乎让人们能延缓衰老，摒弃皱纹，可是没有人真真切切地教我们如何从容老去。

  我看这本《门罗先生的普普人生》的时候，已经给自己做了一些的心理准备，可真的去看书的时候，给我带来的心灵冲击，并没有因为我提前做好了准备就能好过一点，我依然为主人公命运的高低起伏而伤筋动骨，只是我却更加地热爱我现有的人生，因为每一个今天都是你人生中最年轻的日子，过去只存在回忆里，我们从过去里吸取养分，是为了更好地走下去。

  本书讲述了这样一个故事，七十多岁的乔尔•门罗先生的人生像时钟上的指针，在表盘上按部就班地走着，日复一日过着重复的生活。在妻子离世之后，他失去了生活的动力，仅凭惯性继续麻木地绕圈。终于，在目睹过太多死亡之后，他拒绝再重复前行——

  应当由自己来决定什么时候停下，自己的生命应该由自己主宰，他决定自杀，在被别的东西杀死之前。他不再希望活着，他想离开这个世界。

  每个人的一生中都有一些“我不想活了”的时刻，门罗先生决定行动起来，寻找一种体面的自杀方式，接着是他和挚友为了实现这件事情，作出的不断努力和各种尝试的故事。

  像书里说的，每一个人都有厌世的情绪，严重一些是抑郁症，浅一点只是偶然的负面情绪，只是有的人选择结束，一了百了；有的人选择遗忘，得过且过，而老人却是容易感到最孤独寂寞的吧，在每一个漫长无所事事百无聊赖的白天，在每一个病痛来袭无力反抗严重失眠的夜晚，在与之携手走过半生的爱人离开之后，所有的一切都像是大厦将倾，我们无法真正做到感同身受，我只是看着作者轻描淡写的文字都觉得触目惊心。

  

  《门罗先生的普普人生》

  我知道自己也终将有老去的一天，也或许我此时此刻就已经不再年轻了，生活让我们每个人都精疲力竭，可是还想要好好活下去。

  因为我在这本书里看见了平常看不见的， 关于绝望里的希望，关于尊严里的倔强，关于偏见里的柔软，关于意外后的开始，以及发自内心的，对于这个世界的热爱。

  死永远不是解决问题的唯一办法，改变自己，才能改变人生。而苍老和皱纹也并不可怕，那是我们经历的丰碑，和岁月亲吻过留下的纪念品。

  End。

• 最佳损友

  作者：四野朝夕 发布时间：2023-12-24 13:45:54

  花了一个晚上的时间将这本书看完了，彼时我正经历楚格裸辞后的尴尬境地，对待好朋友也难免有楚格的心境。嫉妒可能说不上，其实内心也知道更多也是对自己混乱状态、混沌生活的焦虑与不认可，但是想法和理智总是会撕扯的，于是造就了自己的不坦诚和别扭。其实说起来朋友，我还是祝福你的，但我没办法坦诚的面对我自己。

  和苏迟的爱情也非常好理解，经济实力不对等，楚格没办法心安理得的接受，会觉得自己崇尚的“爱”被污染，下一个季度的房租只不过是压垮骆驼的最后一根稻草罢了。我认为爱情最需要的是坦诚，但是楚格没办法坦诚，而苏格虽然游刃有余尽力在打消楚格的这种别扭感，但从相遇开始，他长了近十岁的年纪和经历，积累的财富对于楚格来说都是一种压迫。和知真的相处便是这种爱情的衍生，相处起来其实很舒服，但总会格格不入。

  故事的最后，婚礼上，楚格没和桑田说上一句话，就告别了。恐怕两个人的故事也止步于此，婚姻会将女性朋友天然的划分到不同的阵营里面去，哪怕彼此都不是故意，哪怕彼此仍然相爱，但是“命运决定了，再没法聚头”。楚格心里有个裂缝是为晓茨留的，也有个空白是为桑田留的。桑田和楚格的情感联结于微时，所以哪怕各自际遇不同，但是这种情感联结仍然牢固。

  “朋友，你试过将我营救，朋友，你试过将我批斗，无法在与你交心联手，毕竟，难得有过最佳损友”