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Callable Interface public interface Callable<V> { V call() throws Exception; } Test class import java.util.concurrent.ExecutionException; import java.util.concurrent.FutureTask; import java.util.concurrent.Callable; /** * @author syw * @date 2021 22:00, August 25 */ public class CallableTest implements Callable<Str ...

Welcome to the blog home page: https://blog.csdn.net/u013411339 Welcome to like, collect, leave messages, and exchange messages!This article was originally written by [Wang Zhiwu] and started on CSDN blog!This article is the first CSDN forum. It is strictly prohibited to reprint without the permission of the official and myself! This artic ...

Recently, I saw several articles related to Jetpack MVVM, which made me want to get into this mess. I came into contact with Jetpack's set of development tools in the second half of 2017, and have since taken it as the main framework for development. During this period of use, I stepped on some pits and accumulated some experience. In order to ...

HandlerActivity.runOnUiThread()View.post(Runnable r) Let's talk about the Handler mechanism Handler is mainly composed of the following parts. Handler Handler is a message auxiliary class, which is mainly responsible for sending various message events to the message pool Sendmessage() and the handler that handles the corresponding message e ...

There are many kinds of containers in C + +. The common ones are sequential containers: vector, deque and list. There are also associated containers: set, multiset, map and multimap. There are too many containers. Let's talk about the three most commonly used containers: vector, list and map. First: Vector container Sketch Map: characteris ...

Semaphore is a count based semaphore. It can set a threshold. Based on this, multiple threads compete to obtain the license signal and return it after making their own application. When the threshold is exceeded, the thread application license signal will be blocked. Semaphore can be used to build some object pools and resource pools, such as ...

3. stop()Method directly terminates the thread, and**The lock held by this thread will be released immediately**. These locks are just used to maintain object consistency. If the write thread sucks in half of the data and forcibly terminates, the object will be written bad. At the same time, because the lock has been released, another read ...

JNI principle: [analysis of registration process of Dalvik virtual machine JNI method] Example: when libnanosleep When the so file is loaded, the function JNI_OnLoad will be called. In function JNI_ In onload, the parameter vm describes the Dalvik virtual machine in the current thread. A JNIEnv object can be obtained by calling its member fun ...

Class load Load the bytecode content of the class file into memory, convert these static data into the run-time data structure of the method area, and then generate a Java Lang.class object The class loader loads classes into memory. There are bootstrap classloader (provided by the JVM, written in C + +, which is responsible for the core ...

[]( )Callable thread creation public class CallableTest { public static void main(String[] args) throws ExecutionException,InterruptedException { // new Thread(new Runnable()).start(); // new Thread(new FutureTask<V>()).start(); // new Thread(new FutureTask<V>( Callable )).start(); new Thread ...