java learning sites

for a job will not lose the lose. Then, if you've only learned Java Web development, it's easy to get started with Android development (hands-on experience tells me it doesn't take one months). However, do not rule out some Java Web programmers have become accustomed to the use of framework development, Java Basic knowledge has forgotten a clean, this turn to w

Java learning notes (4): memory management, java learning notes In terms of memory, Java itself has a spam mechanism, which seems to be negligible on the surface, but if we understand it, it may sometimes get twice the result with half the effort. So I took some time to sort

Java learning diary 9-exception, Java learning diary 9- Exception) 1. What is an exception? Exceptions are errors in the program, such as array out-of-bounds and NULL pointer access. In Java, everything is an object, and exceptions are no exception. All exceptions are an ins

In the Java learning we will inevitably make some logic errors, grammatical errors, and some running errors, for the poor English people, on the following 2 common words, help us to improve the use of software coding speed and code debugging, more convenient to find errors, Know that 1 in the key can effectively avoid some grammatical errors, such as these keywords are not used to do variable names, or will

Java learning notes 2 object-oriented (on), java learning notes Class and Object A class is the abstraction of a batch of objects. It can be understood as a concept. An object is a specific entity. Class and object are the core of object-oriented. A class defines the characteristics of multiple instances. A class does

Java learning notes 10 (Object-Oriented 3: interfaces) and java learning notes Interface: It can be understood as a special abstract class. An interface is a set of functions. It can be viewed as a data type and is a more abstract "class" than an abstract class" The interface only describes the methods that should be a

Zero-basic learning java: variable (2), Basic Learning java variable The concepts and data types of variables are introduced above. Now we will introduce the conversion between several data types of variables. 1. Automatic type conversion: the data type with a small capacity is automatically converted to a data type wi

Java learning notes thread (1), java learning notes threadThread (1) I. Thread definition in composition: 1. Create tasks and threads: 1 TaskThread task = new TaskThread (); // create task 2 Thread taskThread = new Thread (task); // create the corresponding execution Thread Based on the task 2. Implement the Runnable i

Learn about the 20 English-language websites that Java should go to (Java Learning website)1.http://www.javaalmanac.comThe online version of the Java Developer Yearbook book. This is a good place to get a quick look at the usage and sample code of some Java tricks.2.http://w

Subject: Senior 4. Currently, I am deeply immersed in java and have unknown prospects. I want to ask for advice. Senior 4: I am deeply immersed in java and have unknown prospects, java is not a good language. The syntax is complex, concurrent processing is cumbersome, and functional programming progresses slowly. However, the subject is obviously not interested i

Common Command Management Wang Coli (Star stars) in Java learningA. Common DOS commands in windowWhere to operate DOS commands:Win7---> Start----"All Programs---" accessories----"Command promptWin7--> Start---"Run----" Input cmd1.1 Drive Symbol Switching:Disk Fu Yi + colon format: drive letter:Example: Want to drive from C to DC:/user/xxxx D:1.2 Working with foldersDir: Displays all files and folders in the current folder.CD path: Enter to the spe

Deep Learning of java enumeration applications and deep learning of java Enumeration I. Differences between enumeration and static Constants When talking about enumeration, let's first think about how it is different from the constant modified by the public static final String. Two advantages of enumeration are as foll

Learning java from scratch (2) classes and objects, learning java objects from scratch Object-oriented refers to dividing a problem transaction into various objects. The object is created not to complete a step, but to describe the behavior of a thing in the whole process of solving the problem. A class is the abstract

Java Learning (6), loop structure, and java learning loop structure 1. while Loop: Also known as "When Type Loop" While (loop condition ){ // Cyclic operation statement } Key points: ① judge first and then execute ② the number of cycles is not fixed ③ avoid endless Loops Example: enter a positive integer and output it

Java series Learning (6)-array and java series learning Array 1. Method: (1) Definition: Code that completes a specific functional block, also called a function in some languages (2) format: (3) method Overloading [In the same class, the method name is the same, the parameter list is different, and it is

JAVA Learning (1): Java introduction, configuration and Setup of its platform and development environment, and java ConstructionJava introduction, platform, and development environment configuration and Setup1. Introduction to JavaJava is an object-oriented programming language with many features such as cross-platform