Java
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New feature of JDK 14: nullpointerexceptions for easier use
New feature of JDK 14: nullpointerexceptions for easier use The exception that makes 99% of Java programmers headache …… -
Junior sister learning javaio: file encoding and character set Unicode
brief introduction On a whim, the younger martial sister used a new skill that she had never used before, but there wa…… -
The use of cyclicbarrier in Java
Cyclicbarrier is a thread safe component introduced in Java 5. It has a barrier concept, which is mainly used to wait …… -
Building an efficient result cache in Java
Caching is a very common component in modern application servers. In addition to third-party caches, we usually need t…… -
Type inference and lambda expressions in Java
brief introduction Java is a strongly typed programming language. Each variable used in Java needs to define its type,…… -
PriorityQueue and priorityblockingqueue
PriorityQueue and priorityblockingqueue brief introduction Generally speaking, queues are FIFO. Of course, we also int…… -
Java functional programming and lambda expressions
What is functional programming Lambda expression @Functional interface Format of lambda expression Method reference -
Implementation of concurrentskiplistmap in skiplist and Java
Implementation of concurrentskiplistmap in skiplist and Java brief introduction At first I heard that skiplist made me…… -
A little secret about throw exception in Java
A little secret about throw exception in Java brief introduction In the previous article, we mentioned that to handle …… -
Understand all the little secrets of string in one article
brief introduction String is a very common object type in Java. It can be said that string is the most used in Java. S…… -
The essence and difference between IO and NiO in Java
brief introduction Finally, I'm going to write the most exciting parts of Java, IO and NiO. The full name of IO is inp…… -
Junior sister learning java IO: reading files
brief introduction Younger martial sister is a little confused about the reader and stream in Java io. She doesn't kno…… -
Finally, I broke all your imagination of Java objects with JOL
brief introduction The advantage of using object-oriented programming language is that although you don't have a girlf…… -
Junior sister learning javaio: the wonderful use of channel in NiO
brief introduction Younger martial sister, do you remember our initial intention of using IO and NiO? Younger martial …… -
Java has a deep understanding of shallow copy and deep copy
brief introduction Copying objects is a common problem in Java. There are two types in Java, base type and reference t…… -
[introduction to Java] Day11 Java agent – JDK dynamic agent
Today, let's take a look at another proxy method of Java - JDK dynamic proxy The proxy method we introduced earlier is…… -
Traversal operation of ArrayList and LinkedList
summary A well-known little knowledge of a java program is that ArrayList and LinkedList are best deleted by iterator …… -
One of the java reference types you must know – soft reference
definition Soft reference is a reference created by using softreference. Its strength is weaker than that of strong re…… -
[introduction to Java] Day24 Java container class (VII) HashMap source code analysis (II)
KeySet Let's take a look at the keyset first. The member variable keyset in HashMap saves all key sets. In fact, this …… -
[introduction to Java] day18 Java container class (I) collection interface
Today, let's take a look at a big guy in Java, that is, container. The so-called container is specifically used to hol…… -
[introduction to Java] Day1 abstract class
The basic part has almost been explained. Today we begin to enter the Java improvement part. This part will be much mo…… -
[introduction to Java] day22 Java container class (V) HashMap source code analysis (I)
The first part mainly explains the structure, important parameters and methods in HashMap, as well as the places and a…… -
[introduction to Java] day15 revisiting Java generics — Generic wildcards and upper and lower boundaries
The last article introduced what generics are, why generics should be used and how to use generics. I believe you have…… -
One of the java reference types you must know — weak references
definition Weak reference is a reference created by using WeakReference. Weak reference is also used to describe non e…… -
JDK1. 8 new feature lambda expression simplification. There is an optimization method of for loop in if else
In the daily development process, being able to write the code does not necessarily mean being able to write the code …… -
Java method parameters can only be passed by value!
In common parlance, the transfer of method parameters is divided into two types: value transfer and reference transfer…… -
[difficult Java PROBLEMS] the execution sequence of try catch finally when there is a return
There is such a problem that everyone should be familiar with exception handling, similar to the following code: When …… -
[difficult and miscellaneous problems of Java] use Java core library to realize simple AOP
Spring is a very popular open source framework, and AOP (aspect oriented programming) is one of the most important con…… -
[introduction to Java] Day6 Java inner class – member inner class
What the inner class is, in short, is the class defined inside the class (serious nonsense). A serious inner class loo…… -
You must know the type of java reference — a detailed explanation of phantom reference source code
definition Phantom reference is a virtual reference that does not affect the life cycle of an object, nor can it get a…… -
Java zero foundation entry series – day13 inheritance and polymorphism of Java classes
Inheritance is a very important feature of a class. What? You don't even know about inheritance? Are you trying to pis…… -
[introduction to Java] Day9 Java internal class – static internal class
Today, let's talk about the last internal class in Java - static internal class The so-called static inner class is na……