Programmer Think

Title: start two threads to print odd and even numbers from 0 to 100 alternately You may have encountered this problem during the interview. Although you have learned the knowledge related to multithreading, you may not be able to write it for a while and a half. Now let me take you to write it again! Method 1 First, we can observe that odd ...

Core concepts The important components are described below: Broker: The Message Queuing service process, which consists of two parts: Exchange and Queue. (Post Office / Express) Exchange: A message queue switch that routes messages to a queue according to certain rules and cares about messages. (courier in post office/courier in express compa ...

Statement: this series of blogs is compiled according to SGG's videos, which is very suitable for you to learn. Some articles are collected by crawlers and other technical means in order to learn and share. If there is a copyright problem, please leave a message and delete it at any time. The latest version of big data interview questions in 2 ...

fis.close(); } /* * Method to realize file replication * 1. Byte stream reads and writes a single byte */ public static void copy_1(File src,File desc)throws IOException{ FileInputStream fis = new FileInputStream(src); FileOutputStream fos = new FileOutputStream(desc); int len = 0 ; while((len = fis.read())!=-1){ ...

I thought it might be a log problem, but there is no evidence to support it. The trace command can monitor the time consumption of each step, and can cooperate with the conditional expression to print a detailed log when the time consumption exceeds xx ms. Find a machine, enter a command, and then wait. When rt spikes appear again, the time-c ...

Let's start with the summary Parent static field - > parent static code block - > child static field - > child static code block - > parent member variable and non static block (sequential loading) - > parent constructor - > child member variable and non static block (sequential loading) - > child constructor Static cod ...

Focus on official account: high performance architecture exploration. The background replies to [data], which can be collected free of charge   As the saying goes: learning is like sailing against the current. If you don't advance, you will retreat; The heart is like a horse on the plain, easy to put but difficult to collect. This sentenc ...

"Do you know ThreadLocal?" "Tell me about your understanding of ThreadLocal" Of course, some interviewers will slowly lead to this topic, such as asking "how to prevent their variables from being tampered with by other threads in a multi-threaded environment", giving the initiative to yourself, and the rest depend ...

problem 1. If there is a very time-consuming calculation in the business: + 1 million operations (the speed is slow and the execution time becomes longer) 2. Multiple execution units in the program at the same time? And they are all cycles (dead cycles) 1, Thread 1. Background java supports multithreading (JS php) and a large number ...

title: multithreading review date: 2020/10/17 1. Thread life cycle and status Newborn, ready, running, blocked, dead 2. sleep,wait,join,yield 3. Understanding of thread safety Example 1: if there are 10 tickets and three people buy them at the same time, because there is no thread synchronization, they may buy the same ticket. When there ...