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Java_ Self writing byte buffer stream for data transmission I. byte buffered output stream ​        java.io.BufferedOutputStream extends OutputStream BufferedOutputStream: byte buffered output stream. Common member methods inherited from parent class: public void close(): close this output stream and release any system resources associated ...

1, Demand Please enter an expression calculation formula: [722-5 + 1-5 + 3-3] Click calculation [as shown below] Excuse me: how does the bottom layer of the computer calculate the result? Note that it is not a simple operation to list the formula, because we look at the formula 7 * 2 * 2 - 5, but how the computer understands the formula (for ...

  0x01 overflow attack event On April 22, 2018, hackers launched an attack on BEC smart contract and took out: 5789604461865810000000000000000000000000000000000000000000000000000000000000000000000000000.792003956564819968 BEC tokens were sold in the market. BEC depreciated sharply and its value was almost zero. The market collapsed insta ...

prefaceThe previous article introduced the scenario of index invalidation( Talk about the failure of MySQL index ), the explain execution plan is used. The execution plan returns the information of each step in the execution process instead of executing it.Through the returned one or more rows of information, each part of the execution plan and ...

Recognize the sorting algorithm of O(NlogN) 1. Analyze recursive behavior and estimate its time complexity Recursive process: the recursive process is a multi fork tree. The process of calculating the nodes of all trees is to use the stack for post order traversal. Each node can continue to return upward only after summarizing information to ...

1, Shared memoryShared memory is that the operating system directly opens up a space on the physical memory as a buffer area for inter process communication. Compared with other process communication methods such as pipeline and message queue, shared memory has higher efficiency because the design of shared memory is based on the address of phy ...

Many beginners will be confused about how Spring Boot packages the application code and all dependencies into a separate Jar package, because after the traditional Java project is packaged into a Jar package, the dependencies need to be specified through the - classpath attribute before it can run. Let's analyze and explain the startup principl ...

Common probability density images in Statistics Reviewing probability theory and mathematical statistics today, I saw several common distributions and suddenly became interested, so I tried to write about them matlab Draw several common probability density images (Note: some are collected and sorted from the Internet) Binomial: Binomial dist ...

Hadoop overview Hadoop composition HDFS Architecture Overview Hadoop Distributed File System (HDFS for short) is a distributed file system. NameNode (nn): stores the metadata of the file. Such as file name, file directory structure, file attributes (generation time, number of copies, file permissions), block list of each file, DataNo ...

DHT11 module DHT11 is a wet temperature integrated digital sensor. The sensor includes a resistive humidity measuring element and an NTC temperature measuring element, and is connected with a high-performance 8-bit single chip microcomputer. Through the simple circuit connection of MCU and other microprocessors, the local humidity and t ...