Java

A Java inner class or nested class is a class that is declared in a class or interface. We use an inner class to logically group classes and interfaces in one place so that it is more readable and maintainable. In addition, it can access members of

Background:Project requirements, simply post maven-dependent addresses on the page to download dependencies directlyFor example com.avides.springboot.testcontainer springboot-testcontainer-common 0.1.0-rc6Put this on, the project will be

In the Java keyword,static and final are two of the keywords we have to master. Unlike other keywords, they are used in a variety of ways, and can improve the performance of the program and optimize the structure of the program in a certain

1. Generate the KeyStore fileExecute the following command at the command line:Shell Code Collection Codekeytool -genkey -validity 36000 -alias www.zlex.org -keyalg RSA -keystore d:\zlex.keystore which-genkey indicates that the key is

One into the programming deep like the sea, from this sister is passers-by.How to traverse the list collection:　　New ArrayList (); // The first way of traversing System.out.println (list); // The second type of traversal, the most common type of

The ValueOf () method is used to return the value of the native number object for a given parameter, which can be a native data type, string, and so on.This method is a static method. The method can receive two parameters one is a string, and the

Array:The definition of an array;declaring arrays, allocating space, assigning valuesCreation of array objects;The element is an array of reference data types;two-dimensional array;Initialization of two-dimensional arrays;Copy array: Arraycopy ()

Topicstring s = new string ("Hello") and string s = "Hello";Differencestring s = new string ("Hello") creates a 2 (1) object, and string s = "Hello" creates 1 (0) objects.Note: When the string constant is in the pool there is an object hello in

Consistent HashIn the distributed process, we spread the service to a number of nodes in order to improve the service through the collective force. However, for a client, which node is the service? Or what tasks did he assign to a node?Strong

Java deserialization principle-demo (a) 0x00 What is Java serialization and deserialization?Java serialization refers to the process of converting a Java object into a sequence of bytes that is easy to store in memory, files, and databases, and the

Java 8 Adds a new lambda expression that can be used instead of a lambda expression when the interface is a @FunctionalInterfaceThe typical application scenario for a function is: A. 1 interfaces with only 1 methods, avoid writing anonymous classes;

What is a static variableAs we all know, we can create multiple objects of this class based on a class, each with its own members and independent of each other.At some point, however, we would prefer all objects of the class to share the same member.

Wait and notifyWait and notify can implement communication between threads, and when one thread executes a condition that does not meet the criteria, it can call the wait method to put the thread into a waiting state, and when another thread

Threads are smaller units of execution than processes and are further divisions based on processes. Multithreading means that a process can produce multiple threads that are concurrently running at the same time during execution. The multi-process

In the project development, often encountered the need to implement a number of scheduled operations tasks, written many times, but each time, will always have some details to forget, and later thought may not be summed up the reason, so today's

Simple IntroductionThe string Chang in Java is a pool of strings stored in the Java heap memory . We know that string is a special class in Java, and we can create a string object using the new operator, or you can create a string object with double

First, the understanding of threadlocalThreadLocal, many places are called thread-local variables, and some places are called thread-local storage, in fact, the meaning is similar. Maybe a lot of friends know that threadlocal a replica is created

Parsing of a stringMeaning of the 1.String①string can not be inherited, the string class is the final class, and the string class is a char[] array to store strings.②string is an immutable sequence of characters that, if stored in ABC, creates an

Tag: value store style str problem new out bug ToStringJust learn the Java loop, to find the factorial problem, found that 10! You can use the int type to store the value,What about 100? With long? Found with a long type, the result of running the

0 algorithm overview 0.1. Algorithm classification 10 kinds of common sorting algorithms can be divided into two major categories:Sorting of nonlinear time comparison classes: The relative order between elements is determined by comparison, because