Programmer Think

Test example: public class Bese64Utils extends Base64Utils { public static void main(String[] args) { String str = "https://blog.csdn.net/weixin_42798851/article/details/118678116?spm=1001.2014.3001.5501"; // encode decode byte[] encode = encode(str.getBytes(StandardCharsets.UTF_8)); System.out.println ...

So we can see ConditionObject The waiting queue is managed by holding the head and tail pointers of the waiting queue. The main thing to note is Node Class reuse in AQS Medium Node Class, its node state and related attributes can be viewed[AQS Article on the implementation principle of]( )，If you read this article carefully, right condition ...

6. We check the getClassLoader() method and find that the returned PathClassLoader inherits from BaseDexClassLoader 7. Then we check BaseDexClassLoader and find that it creates a pathList object of DexPathList type when it is created, and then calls pathList when it finds class Method of findClass 8. Then we check the findClass in the DexPath ...

Dear friends, when we create a new object, how is the object produced? Let's talk about the object generation process and memory allocation mechanism. We can talk about it during the interview, which is definitely a bonus. 1. Check when loading class During the execution of the virtual machine, Execute to new keyword (new keyword, object clo ...

49. Alphabetic word grouping You are given an array of strings. Please group the heterographic words together. A list of results can be returned in any order. Alphabetic words are new words that result from rearranging the letters of the source word, and the letters in all source words are usually used exactly once. Example: input: strs = ...

Explanation Class in java. Both forName() and lassLoader can load classes. ClassLoader is a class loader that follows the parental delegation model and ultimately calls the startup class loader. It implements the function of "getting a binary byte stream describing this class by its fully qualified name", getting it into the binary s ...

prefaceHello, I'm Lin Sanxin. I'm talking about the most difficult knowledge points in the most easy to understand words. I believe everyone must have used Vue router, that is, routing, in Vue project. Therefore, in this article, I will not explain the basic explanation of Vue router. I will not explain the source code of Vue router to you. I w ...

1, JavaSE interview questions 1.1 self increasing variable What should the following program output: public static void main(){ int i=1; i=i++; int j=i++; int k=i+++i*i++; System.out.println("i="+i); System.out.println("j="+j); System.out.println("k="+k); } The answer is: i=4 j=1 k=11 The execution instru ...

Catalogue of series articles The purpose of this article is to explain in detail the six steps of connecting to a database using JDBC   The first step is to register the explanation link of the driver: JDBC - MySQL registers the driver (reflection) in the way of class loading_ m0_56164356 blog - CSDN blog // 1. Register drive ...

President Liu returns again. Today, the military industry and lithium battery are catching up, which has injected their own wages and strength into China's economy I believe that for front-end development engineers with a certain foundation, routing is no stranger. It originally originated from the server. In the server, routing describes the ...