best java reference book

Java Development Book List Computer Fundamentals:"in-depth understanding of computer systems" "Computer network" Network:"TCP/IP protocol Volume One", "UNIX Network Programming Volume One" (Part of the chapter, Java is mainly to understand) Java Fundamentals: "In-depth understanding of the JVM" "Thinking in

The book is generally finished, but the seventh chapter is not in a hurry to end.But fortunately it is finished, barely count it.Recall this year, quite feeling, the heart has been seeking progress, but it is very difficult to act up.Think about it indeed ah, want to always progress must sacrifice their spare time, although not to exclude learning, but you have to admit that the feeling of paralysis is very good.Man, there's really nothing to stop, an

extension, the value of Start7 after the 0xffffffff,start7>>>1 is the 0x7fffffff;When this value is re-deposited in start7, in order to put int value into the short variable, Java automatically executes the dreaded narrow native type, directly the high 16 bits off, the remaining (short) 0xFFFF, and back to the starting point, resulting in a dead loop.This reminds us not to use the compound assignment operator on the Short,byte,char type, which is pro

type modifier (typespecifier). It is designed to modify variables that are visited and changed by different threads. Variables defined by the volatile type are extracted directly from the corresponding memory each time the system uses it, rather than using the cache. After using the volatile modifier member variable, the values of the variables that all threads see at any time are the same. A demo sample using volatile is given below. public class mythread Impl ements Runnable

A practical tutorial on data Structure (Java edition)Read the first chapter of the collection combined with the code in the book slightly modified to do a little exercise:Curriculum class:Package Com.chujianyun.com;public class Table {private string Key;private string Rest;public table () {}public table ( String key, String rest) {super (); This.key = Key;this.rest = rest;} Public String GetKey () {return k

First look at the effect chart: 1.sql ①t_orderitem a foreign key Bname: Convenient late book deletion CREATE TABLE ' T_orderitem ' ( ' Orderitemid ' char () not NULL, ' quantity ' int (one) DEFAULT null, ' subtotal ' Decimal (8,2) default NULL, ' bid ' char (m) default null, ' bname ' varchar ' default null, ' Currprice ' Decimal (8,2) default null, ' image_b ' varchar default NULL, ' oid ' char (#) default NULL, PRIMARY KEY

OpenCV, a cross-platform computer vision library based on BSD licensing (open source), can run on Linux, Windows, Android, and Mac OS operating systems. It is lightweight and efficient-consisting of a series of C functions and a small number of C + + classes, and provides interfaces for languages such as Python, Ruby, and Matlab, and implements many common algorithms for image processing and computer vision. OpenCV in C + + language, its main interface is also C + + language, but still retains a

Document directory (1) do not explicitly call system. GC () (2) minimize the use of temporary objects (3) it is best to explicitly set the object to null when it is not used. (4) Try to use stringbuffer instead of string to accumulate the string (For details, refer to the string and stringbuffer in another blog article in Java) (5) You can use basic types such as int and long to remove integer and long objects. (6) Use as few static object var

Keyword: Java Embedded Development dB data address book Text Database micro-Record Data (These mini programs are, by example, dropped on code. Google): http://code.google.com/p/greenvm/downloads/list Lmini is one of the loonframework branch projects. It is a 55 KB pure Java Embedded text database that does not support SQL statements and performs data operations

JAVA object reference, object assignment (conversion), and java assignment Link: http://zwmf.iteye.com/blog/1738574 Keywords: java object referenceJava object and its referenceSome basic concepts about objects and references.When I was a beginner in Java, I thought the basi

Learning programming language at school is just plain understanding, there are a lot of things that do not understand, want to pass this book to the Java language has a deeper understanding, for future study and work will have great benefits. Rather than a cursory look at some of your books, know it but do not know why, this is not what I want to learn.The reading of this

Ha ha. People usually use the phone book. Here's a simple phone book that uses Java to simulate ...First, give the abstract class of the contact.Package net.itaem.po;/** * * Phone person's information * */public class User {private string name;private string Phonenumber;private string Companyname;private string Email;private string address;private string Birthday

Reading today finds a very interesting question.What will the following program output?public class Test2 {public static void Main (string[] args) {int j = 0;for (int i = 0; I J = j + +;}System.out.println (j);}}The result of the output is: 0 just saw the time to feel very strange, I chose the answer is 100, and then read the book to explain what is the middle cache variable, the result of the mess, the final discovery actually explained is very simp

Java EE Internet Lightweight Framework integrated developmentPart 1th Introduction and Technical basics1th. Understanding the SSM framework and Redis 21.1 Spring Frame 21.2 MyBatis Introduction 61.3 Spring MVC Introduction 111.4 Most Popular Nosql--redis 121.5 Ssm+redis structural block Diagram and overview 132nd Java Design Pattern 152.1 Java Reflection Technolo

is random.What's the difference between HashMap and Hashtable?Hastmap is an interface that is a sub-interface of the map interface, an object that maps keys to values, where the keys and values are objects and cannot contain duplicate keys, but can contain duplicate values. HashMap allows null key and null value, while Hashtable is not allowed.HashMap is a lightweight implementation of Hashtable (non-thread-safe implementation).Constructors are not overridden in

of the equals sign. New is to open up space for objects in memory. Specifically, new is a space for objects on the heap of memory (heap). In this space, the data and methods of the object are saved. Look at the left side of the equals sign again. Aperson refers to a human object, called an object reference (reference). In fact, Aperson is not the object itself, but rather a pointer to an object. The Ap

Java basics: whether to pass the value or reference-Linux general technology-Linux programming and kernel information. The following is a detailed description. 1. Simple types are passed by value When Java method parameters are of simple type, they are passed by value ). This can be illustrated through a simple example: /* Example 1 */ /** * @ (#) Test.

(final)Final Double per_inch=2.54;2. strictfp-represents an accurate floating-point calculation where the intermediate process does not truncate// The following method is calculated using the exact floating point number Private double Calculate (double double double z) { return x * Y/ z; }3. Use String.Equals () to determine if the strings are equal, not "= =" 4. "" represents an empty string, and Null indicates that the string variable is not associated with any string obje

[Java core technology volume I (the ninth edition of the original book)] Chapter 1 collection, the ninth edition of core technology This chapter describes how to use the Java class library to help us implement the traditional data structure in programming. Here, we only introduce how to use the collection classes in the standard library. 13.1 collection Interfa

status NBSP; lock Type advantages cons applicable range biased lock locking, unlocked unwanted amount External consumption thread competition when there is additional lock cancellation consumption Only one thread accesses the scene of the synchronization block lightweight lock competing threads do not block and incr