java perf tool

The examples in this article describe the regular tool classes for Java implementations. Share to everyone for your reference. Specifically as follows: The regular tool class implemented here is applicable to: regular telephone number, mailbox, QQ number, QQ password, mobile phone number The Java code is as follows:

Thread Affinity Why thread CPU affinity is required Applications are executed in a multi-threaded manner, most of which can be reasonably scheduled. In some cases, however, an important thread is paused, and the time slice is assigned to an irrelevant thread. When a thread is paused for hibernation each time and is awakened, the cache line (CPU L1/L2 cache) needs to be reloaded. When a thread's working time is short and needs to be awakened frequently, it means that the entire process is slow

IBM Heapanalyzer is a free graphical analysis tool for the JVM memory heap, which can effectively enumerate the memory usage of the heap and help analyze the cause of the Java memory leak. Download after decompression has a Ha413.jar Operating Environment requirements: 1, using Java 2 Platform, JDK 1.6 or to run IBM Heapanalyzer 2. Then configure the environmen

The custom tool in EditPlus uses-java:javac,javaJava JDK installation is configured as an environment variable using the%java_home% methodIn EditPlus, the shortcut tool is set to:Tool One: JavacMenu Text: JavacCommand: JavacParameter: $ (FileName)Starting directory: $ (FILEDIR)Tool Two: JavaMenu Text: JavaCommand: JavaParameters: $ (filenamenoext)Starting directo

");List.Add"S3"); System.Out.printlnList); ComparatorString>Comp=Collections.Reverseorder (); Collections.SortList, comp); System.Out.printlnList);Operation Result: (IBID.)Case 6-3: ListString> List = NewArrayList();List.Add"S1");List.Add"S2");List.Add"S3");List.Add"S4"); System.Out.printlnList); ComparatorString>Comp=Collections.Reverseorder (); Collections.SortList, comp); System.Out.printlnList); ComparatorString>Comp2=Collections.Reverseorder (comp); Collections.SortList, COMP2); Syst

This is a note to read Mat helper. Heap dump is a memory snapshot of the Java process at a specific time. A full GC is usually performed before the heap dump is triggered, so the contents of the dump include the object after the GC.What the dump file contains:1, all objects: class, domain, native value and reference;2, all classes: ClassLoader, class name, super class, Static domain;3,GC Root: A touch-accessible object defined by the JVM;4, line stack

= new string[cm.getparametertypes (). length]; int pos = modifier.isstatic (Cm.getmodifiers ())? 0 : 1; for (int i = 0; i Paramnames[i] = attr.variablename (i + POS); //Paramnames is the name of the parameter for(int i = 0; i System.out.println (Paramnames[i]); } } catch (Notfoundexception e) { E.printstacktrace (); } } Publicstaticvoidmain (String[]args) {Classclazz= Testjavaassist.class;try{classpoolpool=classpool.getdefault (); Ctclasscc=pool.get (

Java build tool-ant Application Guide (3) Call ant in your own program Ant's task is actually a piece of functional code. A large number of built-in tasks of ant are of great significance for developing Java applications. Why cannot we use them directly? Although it is not complicated to call ant tasks in a program, we know that ant tasks are actually

Sequenceinputstream can be seen as an ordered set of multiple inputstream objects. When the data of an inputstream object is read, it automatically retrieves the next inputstream object for reading until all the inputstream objects are read. With this feature, we will compile a file splitting and merging tool. Instructions for use: Sequencedemo [Option] [filepath] [number] Option: -C: indicates the file to be merged. -S: indicates the file to be spli

Package COM. yanek. util; import Java. io. ioexception; import Java. io. inputstreamreader; import Java. io. linenumberreader; public class tool {/*** @ Param ARGs */public static void main (string [] ARGs) {system. out. println (executecommond ("ipconfig");}/*** run the console command using the

The tool execution process needs to interact with the map, and then execute the command, as shown in the following call statement. Hoverimage = "images/selection.gif"Selectedimage = "images/selectiond.gif"Clientaction = "esrimaprectangle"Serveraction = "com. Demo. mycountfeaturetool"Clientpostback = "true"/> For more information about clientaction, see COM. ESRI. ADF. web. faces. clientactions interface in event. The client supports map_circle, map_co

Backup a useful tool class. typeutilIts typetostring (string scope, object OBJ) method adopts the reflect mechanism of Java to print the content of any object.This is very useful for debugging programs.Usage:If you have an object (such as testclassobject) and want to print its content, you can use the following method:System. Out. println (typeutil. typetostring ("yourclassobjectname", testclassobject ));Th

S1. Json2javaautomatically generates corresponding Java entity classes based on JSon data, and also supports Parcel, Gson Annotations corresponding code generation. Expect subsequent extraction of the parent class as well as multiple URLs to build the entire project's functionalityProject Address: Https://github.com/jonfhancock/JsonToJavaOnline Demo: http://jsontojava.appspot.com/S2.jsonschema2pojoGenerates Java