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abnormal).scenario for the second method:Object memory cannot be freed by the Java Virtual machine and is growing, taking up a lot of space, resulting in insufficient JVM memory.2. Using the Mat tool to locate memory leaks learn about the JVM garbage collection mechanismJava does not need to manually manage program memory like C, it has its own garbage collection mechanism: running asynchronous threads eve

Java Processing IP tool classes, including the long type of IP to the general IP type, the xx.xx.xx.xx type to a long type, based on the mask bit to get the mask, based on the ip/mask to compute the IP segment of the start IP, based on the ip/mask to compute IP segment termination of IP, and other methods, can be used directly! Copy Code code as follows: Package com.hh.test; Import Java.util.H

dealer can stock a part of the goods, 　　Therefore, compared to the direct trading model, the overall use of intermediate dealer mode will be higher throughput (can be sold in bulk); On the other hand, because of the introduction of the dealer, the product from the producer to the consumer to add additional trading links, the performance of a single product can be reduced in time. There are two different ways to declare a synchronousqueue, and they behave differently. 　　The difference between fa

surplus producers and consumers, the latter model, if the producers and consumers have a gap in processing speed, is prone to hunger and thirst, where data from certain producers or consumers may never be processed. SummaryBlockingqueue not only realized the basic functions of a complete queue, but also managed to automatically wait for wake-up between multiple lines in a multithreaded environment, allowing programmers to ignore these details and focus on more ad

The Java Decompiler Project is designed to develop a set of toolsets that can decompile and parse Java bytecode after Java5.It consists mainly of four parts. Jd-core:java Decompiler's core library, which rebuilds Java source code based on one or more. class files. Jd-gui: is a standalone GUI interface tool tha

Get your own Mac book Pro, a word "cool". These two days in the installation of some software, because they want to do some Java development, so the Java decompile tool is indispensable, previously in the Windows platform has been used Djcompiler, now need to find a substitute on the Mac, the results found JD | Java De

Tool class code to get all the total number of Java files in the current project, lines of code, number of lines of comments, number of blank lines Copy Code code as follows: Import Java.io.BufferedReader; Import Java.io.File; Import Java.io.FileInputStream; Import java.io.FileNotFoundException; Import Java.io.FileReader; Import java.io.IOException; Import Java.io.Reader; Import Java.uti

Yesterday, a friend suddenly asked me this question, for a moment I was speechless, just at the beginning is limited to no way to record the repeat position, as just contact with the Java language rookie, racked his brains to the most stupid way to achieve, but also hope the great God pointing out a better way.public class Test01 { public static void Main (string[] args) {Test1 ();} /*** Method Name: Test1* Method Description: An array to remove dupli

policy to automatically retry 3 times when an exception occursGetmethod.addrequestheader ("Content-type", "text/html;charset=utf-8");//sets the character set used when the Get method submits parameters to support normal delivery of Chinese parameters intStatusCode = Httpclient.executemethod (GetMethod);//execute Get method and get return status code, 200 indicates normal, other code is exception if(StatusCode! = 200) {Log.error ("Static page Engine error parsing" + URL + "

development manual will explain each knowledge point step by step, each knowledge point is described based on a complete example. The knowledge points echo each other before and after each other to ensure that learners learn from each other and learn from each other. ★Comprehensive Technical Support:In addition to providing complete development manuals and sample code, we also provide blogs and QQ groups to answer all the problems encountered during the use of portal-Basic. *Portal-basic

1. What is idea?Idea, Java Smart IDE.2. Why should I use it?The advantages of idea:1) Smart Selection2) Navigation mode3) historical records4) Refactoring5) Coding Aid6) Intelligent Typesetting, control7) Smart Code, find, navigate, edit, customizeSummary: Fast, search, analyze, locate, refactor, and efficiently3. How do I use it?1) Remote DebuggingTurn on remote debugging: Catalina.bat JPDA StartJava Remote Debugging2) Plugin modeTasksMyBatis3) Custo

FprofilerFprofiler is a very fast Java Profiler. It uses Bcel and log4j to record each method from the beginning to the end of the journal. Fprofiler can be used in your application, Servlet,applet ... Find the hotspots.More Fprofiler InformationJratJrat is a Java Runtime Analysis Toolkit. Its purpose is to allow developers to better understand the state of the Java