Programmer Think

0. Summary 1.CountDownLatch refers to one thread waiting for other threads, and CyclicBarrier refers to multiple threads waiting for each other; 2.CountDownLatch is the count - 1 until it is reduced to 0, and CyclicBarrier is the count + 1 until it reaches the specified value; 3.CountDownLatch is disposable and CyclicBarrier is recycled; 4.Cyc ...

1. Introduction to native keyword In principle, 100% pure java code is very good, but sometimes you also want to use code in other languages, which is called local code. The provision of local code allows us to use the code written in (c/c + +) in Java, and the implementation of this function depends on the API provided by the Java platfor ...

The beginning of experience First, define a dish class: Dish public class Dish {     private final String name;     private final boolean vegetarian;     private final int calories;     private final Type type;          public boolean isVegetarian() {         return vegetarian;     }          //Omit the set, get, toString me ...

Redis five data types String (String) be careful: The value of string is not limited to strings, such as ordinary strings, complex strings such as JSON,XML, numbers and even binary, but it can not exceed 512MB Next, let's demonstrate the basic operations of adding, deleting, modifying and querying SET key value GET key DEL key MSET key1 ...

spring launch process Spring has been used for many years, and I will occasionally look at or study the spring source code. Looking at the spring source code really makes it very easy for me to work and develop. However, I have never systematically explored the complete start-up process of spring. From these days, I began to sort out the s ...

ArrayList source code analysis The source code viewed in this article is based on jdk1 eight RandomAccess ArrayList implements the RandomAccess interface, while the LinkedList class does not. This is a flag interface. As long as List implements this interface, it can support fast random access. For example, the binarySearch method in the Col ...

Just as you are in the brand new TestProject Python SDK(Part 1 and Part 2 )As you may have read in the previous article on, the SDK will generate beautiful HTML test reports and automatically publish them to the TestProject platform for you without other configuration (you can also download them as PDF files). But did you know that reporting ...

There are thousands of people in the vast sea. Thank you for seeing here this second. I hope my article is helpful to you! May you keep your love and go to the mountains and seas in the future! I/O basic flow Java operates data through streams. IO streams are used to handle data transmission between devices, upload files and download f ...

1: Sequential structure 1.1. The sequence structure is relatively simple Execute line by line in the order in which the code is written public class TestDemo { public static void main(String[] args) { System.out.println("aaa"); System.out.println("bbb"); System.out.println("ccc"); //aaa ...

hashCode() and HashSet, compareTo() and TreeSet We often use Set in Java, but the author encountered a problem a few days ago. How to save the class he wrote into Set?? In the process of making force deduction, the generic parameters after Set are all wrapped classes, but some of the classes written by myself are not perfect enough, so the fu ...