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Character string Literal amount of string: refers to the string itself, such as "Java", "Hello". String object: for example, new String("abc") or direct String s="str". The following "str" is also a string object. String reference: a reference is a variable that points to the corresponding stri ...

review stay Last section We have a general understanding of the creation process and function of threadpertakexcutor, but this is just to build an executor, which has not been really used yet, because before using, we need to build NioEventLoop, and the newChild method in this section is to do this. ...

The principle of Mybatis interceptor is a bit convoluted and simple. The principle is to implement agents for our customized interceptor class through the dynamic agent technology of JDK, and there can be multiple agents. Therefore, Mybatis interceptor will exist in the form of a chain, and each agent w ...

Catalog 1, purpose 2. Practice (jdk8) 2.1 Java heap overflow 2.2 virtual machine stack and local method stack overflow 2.3 method area and runtime constant pool overflow 2.4 local direct memory overflow Reference resources 1, purpose Verify the contents stored in each runtime area described ...

1. Comparison between basic type and reference type 1.1. Which of the following four variables is false Integer i01 = 59; int i02 = 59; Integer i03 =Integer.valueOf(59); Integer i04 = new Integer(59); (1) Integer in order to save space and memory, the number between - 128 and 127 will be cached in mem ...

Class loading process A type starts from being loaded into the memory of the virtual machine and ends at being unloaded. Its whole life cycle will go through seven stages: Loading, Verification, Preparation, Resolution, Initialization, Using and Unloading Collectively referred to as Linking, as shown in the figure: The order of loading, verify ...

We take jdk1.7.0_80 as an example to analyze the HashMap source code. Catalog 1, Source code analysis 1.1 important properties of HashMap 1.2 analytical PUT method 1.3 analyze resize method 1.4 parse GET method 2, Problem summary 2.1 how does the rounduptopower of 2 (toSize) method realize to find ...

This article mainly shares the creation process of NioEventLoop thread bound by server socketchannel In the server startup process, when the registration operation is executed, it will determine whether the current thread is the thread in NioEventLoop bound by ServerSocketChannel. If not, it will encaps ...

Overview of structural mode Overview of structural mode Decorator Pattern allows you to add new functionality to an existing object without changing its structure. This type of design pattern belongs to structural pattern, which is a wrapper for existing classes. This pattern creates a decoration cl ...

Article directory 1, Get all interfaces implemented 2, Get parent 3, Get all construction methods 4, Get all methods 5, Get all attributes Reflection can not only instantiate objects, but also obtain the complete structure of a class. Three classes in java.lang.Class and java.lang.reflect package ...