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*/ public HashMap(int initialCapacity, float loadFactor) { if (initialCapacity < 0) throw new IllegalArgumentException("Illegal initial capacity: " + initialCapacity); if (initialCapacity > MAXIMUM_CAPACITY) initialCapacity = MAXIMUM_CAPACITY; if (loadFactor <= 0 || Float.isNaN(load ...

/** * Send get request; With request parameters * * @param url Request address * @param params Request parameter set * @return * @throws Exception */ public static HttpClientResult doGet(String url, Map<String, String> params) throws Exception { return doGet(url, null, params); } /** * Send get request; With reques ...

#User table create table user( id int auto_increment primary key, username nvarchar(20) null, password nvarchar(20) null, name nvarchar(20) null, gender nchar(10) null, age int null, address nvarchar(20) null, phone nvarchar(11) unique null, email nvarchar(30) null ); #Student list create table student( id int auto_increment prim ...

I Interview questions and analysis 1. Today's interview question What do you know about the traversal method of Map collection? If there is a large amount of data, which method do you use to traverse? ...... 2. Topic analysis Today's interview topic actually examines our mastery of Map set API methods, especially those related to t ...

✨ Algorithm series recommended: LeetCode clearance: I heard that the linked list is the threshold, so I raised my foot and crossed the doorInterview brush algorithm, these APIs can not be known!LeetCode clearance: array seventeen, really not simpleLeetCode clearance: Brush 39 binary trees, crazy! Hello, I'm the third, a programmer who can' ...

1. Why use thread pool? In the previous article, we created a thread when using threads, which is very easy to implement, but there will be a problem: if there are a large number of concurrent threads and each thread executes a task for a short time, the frequent creation of threads will greatly reduce the efficiency of the system, Because it ...

The term "reactivity" refers to the programming model built around responding to change, availability, and processability - network components respond to I/O events, UI controllers respond to mouse events, resources are available, and so on. In this sense, non blocking is reactive because we are now in the mode of responding to notifi ...

for (i in 0..10) { println("Asynchronous request executing: getToken :$i") delay(100) } return "ask" } suspend fun getResponse(token: String): String { for (i in 0...10) { println("asynchronous request executing: getresponse: $token $I") delay(100) } return "response" } fun setText(response: String) { printl ...

### [] () * * [key points]** **Collection: Disordered, repeatable** **List Series collection: ordered, repeatable, indexed.** – ArrayList: The added elements are ordered, repeatable and indexed – LinekdList: The added elements are ordered, repeatable and indexed **Set Series collection: the added elements are unordered, non re ...

Singleton pattern is the most commonly used pattern in design patterns. It belongs to object creation mode, which can ensure that only one instance of a class is generated in the system. Such behavior can bring two benefits: For frequently used objects, the time spent creating objects can be omitted, which is a very considerable overhead for t ...