Java

Java Multithreading and progression (i) concept and principle of Java threading, the concept of thread and process in the operating systemA process is an application running in the operating system memory in which each process has its own separate

There are two ways to initialize a 1.Java array :Static initialization: the programmer assigns values to each element of an array when initializing it; Dynamic initialization: when an array is initialized, the programmer only specifies the length

StringConceptString S1 = "abc"; S1 is a class-type variable, and "ABC" is an objectThe maximum character of a string, once initialized, cannot be changed, and re-assignment refers to the new objectThere is an object in memoryString s2 = new String ("

String str1= "abc"; and String str2 = new String ("abc"); What's the difference.String str1= "ABC" might create an object or not create an object, and if the string "ABC" does not exist in the Java string pool, it will create a string object ("abc")

Creating and destroying objects1. Consider replacing the constructor with a static factory method (static method that returns an instance of the class)2. When encountering multiple constructor parameters, consider using the constructor3. Hardening

1. character encoding Let's take a look at the different character encodings. String s = " Java ABC "; 1. 1 utf-8 encoding UTF8 code: Chinese Occupation 3 bytes, English occupation 1 of bytes byte [] bytes = S.getbytes ("Utf-8");           for

1. Exception:1) Classification:A. Check for exceptions: At compile-time check the program there are some exceptions that programmers cannot foresee, such as opening a nonexistent file, the programmer does not know whether the file exists. Major

I've been working on the reflection in Java lately, and have encountered a small problem, so summarize the considerations and examples of how to invoke methods when reflecting.The main function of this example is * 1, no parameter method* 2, a

MVC (model view Control) Models-View-ControllersI. MVC and the understanding of template ConceptsMVC exists in the desktop program, m refers to the data model, v refers to the user interface, C is the controller. The purpose of using MVC is to

Lombok provides a simple form of annotations to help us simplify the removal of some of the necessary but bloated Java code. Especially for the Pojo class,Here are a few common Lombok annotations:@Data: Annotations are on classes, provide getting

http://blog.csdn.net/axman/article/details/1460544 from jdk1.0 to today, Java technology has undergone a great change in technology over the past more than 10 years. But the final variable is defined from itsSince the day of birth, there has been no

Value passing: (formal parameter type is the basic data type): When the method is called, the actual parameter passes its value to the corresponding formal parameter, the formal parameter only initializes its own storage unit content with the value

There are eight basic data types in http://qxzxcjq-126-com.iteye.com/blog/883283 java: int, char, Boolean, Byte, long, double, float, short. Java is an object-oriented programming language, and data is an object in Java. The object we created with

Java Learning Path (ii), book chapterLearn a new knowledge, can not expect to read only one, or two books will be able to fully grasp. There is a need for a gradual reading process. I recommend the Java Series books published by OReilly.Here I just

This post long summary, continuous improvement, direct end, the specific completion time is uncertain!First, Get seriesGetannotation (Annotationclass) Gets the comment of the classGetannotations () gets all the comments for the classGetcanonicalname

With the development of computer technology, programming model is more and more complex and diversified. But the multithreaded programming model is the final model of computer system architecture at present. As CPU frequency continues to rise, the

http://baobeituping.iteye.com/blog/8025431.Java Engineering Path StructureProject------Lib------SRC------Webroot----Web-inf-----ClassesTwo files:Run.batSetEnv.batRun.bat:@echo offSet path=.; C:\Program files\java\jdk1.6.0_02\bin--Set the path to

Http://www.infoq.com/cn/articles/9_Fallacies_Java_Performance Java's performance has some sort of black magic in the name. This is due in part to the complexity of the Java platform and the difficulty of locating problems in many cases. Yet there is

Jdbc basic query method The three most basic interfaces for jdbc database operations are Statement PrepareStatment CallableStatement. (1) Statement createStatement()  createStatement(int resultSetType, int resultSetConcurrency)  CreateStatement(Int

Use Makefile to optimize the entire process of Makefile Take a set of simple. c files as an example. The learning process from compiling commands to Makefile. The gcc parameters are not described too much. The following files and content: Add.