PAT B grade - 1009 (string disassembly)

... Title: Speaking (20 points) Given a sentence of English, you are required to write a program that reverses the order of all words in the sentence. Input format: The test input contains a test case, giving a string of up to 80 characters in total on one line. A string consists of a...


Java multi-threaded collaboration Semaphore

... Semaphore means semaphore, multi-threaded use of such control concurrency, commonly used methods are acquire() and release() Semaphore without empty parameter construction, when creating objects A permit value must be passed in, representing the maximum number of concurrency; when...


Java final , static, native keyword details

... final keyword meaning: final, can not be changed 用: used to modify classes, methods, properties and variable. 特征: When using final to modify a class, the modified class cannot be inherited. All member methods in the final class are implicitly specified as final methods. When the final...


Javah can not find the class file ultimate jump

... 学习JNI, encountered javah can not find the class file. Finally jumped to the pit to record. Follow the tutorial: Create a folder what (package) in the jnihello (project) path, and edit the HelloJni.java file in the package folder. Run javac HelloJni.java in the package folder to generate...


Yarn Web page 8088 port cannot be accessed in Windows browser

... 问题描述 After configuring Hadoop's Namenode node, secondarynode node and datanode node, configure mapred-site.xml and yarn- in the hadoop /etc directory. After the site.xml file is configured, start the resourcemanager and nodemanager. Among them, the yarn-site.xml configuration is as...


Log4j2 experience summary

... --- Title: summary of log4j2 experience Tags: log springboot grammar_cjkRuby: true --- ## log4j2Introduction ### Advantages: - Reconfiguration does not lose events, has a larger throughput than logback, log4j 1.x version - Log4j 2 is garbage-free for stand-alone applications and low...


Enter two integers a and b to output the sum of the two integers. Both a and b do not exceed 100 bits

... Enter two integers a and b, and output the sum of these two integers. Both a and b are no more than 100. Algorithm Description Since both a and b are large, they cannot be stored directly using the standard data types in the language. For this kind of problem, it is generally handled...


Copy the Files.walkFileTree, delete the folder and its subfolders

... Files.walkFileTree Prototype: static Path Files.walkFileTree(Path start, FileVisitor<? super Path> visitor); Ii. indicates that the file system is traversed from the node represented by start; Iii. where visitor is the behavior controller during the traversal process; 4)...


Using java robot to shut down other people's computers (only for users who have installed java virtual machine)

... Many times, we hope to implement automatic testing, automatic demonstration function, or other mouse and keyboard control applications (such as People click on ads to make profits, etc.). For this purpose, since JDK 1.3, it has provided us with a robot class for generating native input...


Enter a positive integer n and output the value of n!. Where n!=1*2*3*...*n.

... 问题描述 Enter a positive integer n , output n ! 中 n !=1*2*3*…* n 。 Algorithm Description n ! May be very large, and the range of integers that the computer can represent is limited, and you need to use high-precision calculations. Use an array A to indicate that a large integer a , A [0]...