java application profiling tools

The difference between application and Java applet. Java is a semi-compiled and semi-interpreted language. Java usersProgramThere are two types: Java application and Java applet. The

Authoring and application of jar files in Java I think the Java enthusiasts, especially beginners have had the experience, that is, like the Java programming language (this person may not be the same situation), but sometimes always feel that the advantages of Java is her "f

GUI Overview In early computer systems, computers provide users with a "command-line interface (CLI)" That is monotonous, boring, and purely character-state. Even now, we can still faintly see their figure: Open a DOS window in Windows, you can see the footprints of history. Later, Apple took the lead in implementing a graphical user interface (graphical user Interface, or GUI) in the computer's operating system, but because of Apple's closed marketing strategy, it completed its own computer ha

all know, Java technology is a new programming technology, it has platform-independent, object-oriented, security, high-performance, distributed, multithreading and other characteristics, so that Java become the most current type of programming language and platform. For multiple database system federated access and data exchange, Java technology can be used to

is used to compile the Java Library program into standard C code, then compile the C code on different CPUs and operating system platforms, and generate a shared library for Java program invocation, which greatly improves the execution speed of Java programs. In OAS4.0, Java applications have a variety of implementat

learning ideas. Do not study with the knowledge of JAVA. Because I have written JAVA code in C. First WinForm Application Let's create a WinForm project. Then we will learn how WinForm is developed. Select "file" and "new" for Visual Studio development tools. I believe everyone is familiar with the abo

environments, while large development organizations focus on providing common access support for newly developed enterprise-class messaging services, with rich application software support. The biggest winner is the information system user, which is able to easily integrate products and programs from different vendors as required (performance, investment, etc.). One of the keys to developing a highly reusable open API framework is the emphasis on abs

Overview In today's telecommunications environment, network management is becoming more and more complex. Java has revolutionized the way in which applications are built and deployed, providing new tools for network management. The Solstice Enterprise Manager, the main product of Sun Microsystem's design for complex network management, now offers a set of Java A

Compiling and application of jar files in JAVAI think JAVA enthusiasts, especially beginners, have had such experiences. They like JAVA programming language (this person may be different ), but sometimes I always think that the advantage of JAVA is her "fatal" disadvantage. Everyone's belief is still &quo

In recent years, developers have been able to get more extensive enterprise Message Queuing (MQ) products. Proper use of MQ technology can often improve the organization, performance, and scalability of your application. The Java Messaging Service (JMS) is part of the integration into Java EE, which enables MQ services to be used by any

Simple persistence for Java is an open source object-relational persistence library that simplifies object persistence in Java applications using a custom query language and built-in database support. In this article, Software Architect Sami Salkosuo introduces the library and takes you through 0 management of object persistence and 0 configuration methods. Object persistence is almost a prerequisite for a

this tutorial, you should know: How to create a Web service client by using the Eclipse IDE to generate code, using Java SE 6 to compile code. How to use the Java-based build tools Ant in the Eclipse IDE to run specialized Java commands to generate some code from the WSDL published in part 1th of this series. How t

Objective Because the recent deployment of a project on the client side of the one-month run will be the problem of Java memory overflow, in order to constantly monitor the situation of Java memory needs, the need to remotely view the Java memory on the server some of the situation. When the company simulates deploying a project running under Remote monitoring Li

Java Web application configuration file security solutionThis article mainly describes the security of configuration files for Java Web applications. Generally, Java Web applications have more or less configuration files. The configuration of data sources is related to database security. In addition, there are some fil

public access support for newly developed enterprise mail services, and obtaining rich application software support. The biggest winner is information system users who can easily integrate products and solutions provided by different vendors as required (performance, investment, etc.One of the keys to developing a highly reusable open API framework is to emphasize the abstract interface technology, that is, supporting future extension and optional im

obtain the cause and cause of the problem, which usually leads to less downtime and better MTTR. Slow SQL Almost every application uses a JDBC database. A common problem in applications is poor SQL Performance, which is sometimes caused by the absence of an index on a field, the amount of data obtained, or other reasons. This is not conducive to application performance, because most applications involve

directly get user's instance, do not have to test the specific implementation method. If we decide to implement user and userfactory using JDBC technology, we just need to implement Jdbcuser and jdbcuserfactory as described above. Then the Getuserfactory method in the Userfactory can be modified to change the way they are implemented. And we've written a call to Userfactory and the user section without any modifications. This is a simple example of using an interface to define the data stru

The Java language provides an interface mechanism. This interface makes Java object-oriented programming more flexible. We can use interfaces to define the expression of a class, but interfaces cannot contain any implementations. In the book thinking in Java, the author describes interfaces as follows: "interfaces are more advanced than abstract concepts. You can

beginning to know about it, but all the components that implement AJAX applications have been around for several years. It is now being valued because of the great dynamic Web UI that emerged from Ajax Technologies in 2004 and 2005, most notably Google's GMail and Maps apps, and Flickr, the photo-sharing site. These user interfaces are groundbreaking enough, some developers call it "Web 2.0," so the interest in Ajax applications is soaring. 　　 In this series, I will provide all the

The previous article introduced the online application of one of the troubleshooting: High CPU occupancy, this article mainly analyzes the high memory footprint troubleshooting. Java developers often encounter the following two kinds of exceptions: 1, Java.lang.OutOfMemoryError:PermGen Space 2, Java.lang.OutOfMemoryError:Java heap space To explain these two exceptions in detail, you need to simply revisit t