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Step By Step Java Performance Tuning Methods

Step By Step Java Performance Tuning Methods


Java is one of the most common programming languages in the world, but it comes with its annoyances that are hard to get around. Performance can be tough to get right, so find out what you should do to change your code for maximum performance.
This blog will provide you with a quick refresher of how Java works, and then you can read about some of the methods that are available for optimizing your code.


Introduction of Java [Step By Step Java]:

Java is a computer programming language that is according to statistics being mostly used in the world. Java is one of the best programming languages for producing applications that work across multiple platforms, be it on desktop or mobile devices.
JAVA was developed by James Gosling at Sun Microsystems Inc in the year 1991, later acquired by Oracle Corporation. It is a simple programming language. Java makes writing, compiling, Step By Step Java and debugging programming easy. Java applications are compiled to byte code that can run on any Java Virtual Machine.
Basically, Java OOP concepts let us create working methods and variables, then re-use all or part of them without compromising security.


Why Is Java Important?
Java is one of the most popular programming languages used to create Web applications and platforms. It was designed for flexibility, allowing developers to write code that would run on any machine,Step By Step Java regardless of architecture or platform. According to the calculations, more than 1 billion computers and 3 billion mobile phones worldwide run Java.
Java is used to build applications and platforms for a number of devices, including computers, laptops, gaming consoles, medical monitoring devices, parking meters, lottery terminals, and smartphones. It is also a key language for networking, particularly for data centers that store and transfer Web-based data.
Java is also used to create miniature, dynamic programs that run on embedded within Web pages. These programs are called applets and can be used to display maps, weather, games, or other interactive widgets or tools on a Web page.


What are the features of Java?
1) Simple: Java is easy to learn and its syntax is quite simple, clean, and easy to understand.
2) Object-Oriented: In java, everything is an object which has some data and behavior. Java can be easily extended as it is based on Object Model.
3) Robust: Java makes an effort to eliminate error-prone codes by emphasizing mainly on compile-time error checking and runtime checking (Step By Step Java).

4) Platform Independent: As other programming languages such as C, C++, etc which are compiled into platform-specific machines
5) Secure: When it comes to security, Java is always the first choice. With java’s secure features it enables us to develop a virus-free, tamper-free system.
6) MultiThreading: Java multithreading feature makes it possible to write a program that can do many tasks simultaneously.
7) Architectural Neutral: Compiler generates bytecodes, which have nothing to do with particular computer architecture, hence a Java program is easy to interpret on any machine.
8) Portable: Java Byte code can be carried to any platform. No implementation-dependent features. Everything related to storage is predefined.
9) High Performance: Java is an interpreted language, so it will never be as fast as a compiled language like C or C++.
10) Distributed: Java is also a distributed language. Programs can be designed to run on computer networks.


Java Editions:
Step By Step Java

Java Editions is a collection of programs that helps to develop and run the programs that are written in Java Programming language.
Java Editions includes execution engine, compiler, and set of libraries.


Java Standard Edition: Java Standard Edition is a platform that is used for the development and deployment of portable code that is used in desktop and server environments. Java Standard Edition is also known as Java 2 Platform, Standard Edition (J2SE).
Java Standard Edition has a wide range of APIs such as Java Class Library etc. the best implementation of Java SE is Java Development Kit (JDK).


Java Micro Edition: Java Micro Edition is a computing platform that is used for the development and deployment of portable codes for the embedded and mobile devices. Java Micro Edition is also known as Java 2 Platform Micro Edition (J2ME).
The Java Micro Edition was designed by Sun Microsystems and then later on Oracle corporation acquired it in 2010.

Example: micro-controllers, sensors, gateways, mobile phones, printers, etc.
Java Enterprise Edition: Java Enterprise (Step By Step Java) Edition is a set of specifications and extends Java SE 8 with features such as distributed computing and web services. The applications of Java Enterprise Edition run on reference runtimes. This reference runtime handles transactions, security, scalability, concurrency, Step By Step Java and the management of components to be deployed.

Example: e-commerce, accounting, banking information systems.
JavaFX: JavaFX is used for creating desktop applications and also rich internet applications(RIAs) which can be run on a wide variety of devices.
JavaFX has almost replaced Swing as the standard GUI library for Java Standard Edition. JavaFX support for desktop computers and web browsers.


What are the advantages of Java [Step By Step Java]?

Java™ has significant advantages over other languages and environments that make it suitable for just about any programming task.
• Java is a Simple & secured language.
• Java is an Object-Oriented Programming language.
• It is cheap and economical to maintain.
• Java is platform-independent.
• It supports portability features.
• It provides the Automatic Garbage Collection.
• Java supports Multithreading.


What are the certifications available for Java?
Step By Step Java
There are four types of certification levels structured under Oracle’s Java certification path.
They are:
• Oracle Certified Associate (OCA)
• Oracle Certified Professional (OCP)
• Oracle Certified Expert (OCE)
• Oracle Certified Master (OCM)


What are the components of Java?
There are three main components of the Java language: JVM, JRE, and JDK. Java Virtual Machine, Java Runtime Environment, and Java Development Kit respectively.

Java Virtual Machine(JVM): The JVM is a Java platform component that provides an environment for executing Java programs. JVM interprets the bytecode into machine code which is executed in the machine in which the Java program runs.
JVM performs the following functions:
• Loads the code
• Verifies the code
• Executes the code
• Provides runtime environment

Step By Step Java

Java Runtime Environment: The JRE software builds a runtime environment in which Java programs can be executed. The JRE is the on-disk system that takes your Java code, combines it with the needed libraries, and starts the JVM to execute it. The JRE contains libraries and software needed by your Java programs to run. JRE is a part of JDK.

Java Development Kit: The Java Development Kit (JDK) is a software development environment used to develop Java applications and applets. It contains JRE and several development tools, an interpreter/loader (java), a compiler (javac), an archiver (jar), a documentation generator (Javadoc) accompanied by another tool.


Step By Step Java
They are abstraction, encapsulation, inheritance, and polymorphism. Grasping them is key to understanding how Java works. Basically, Java OOP concepts let us create working methods and variables, then re-use all or part of them without compromising security.


Frequently Asked Questions:
What are the main uses of Java?
How is the Java platform independent?
What certifications are there for Java?
Is Java certification difficult?

To get complete knowledge about Java, you can refer to the tutorials provided by Asha24 which are absolutely free.

Asha24 is a trusted online learning provider with a network of more than 250,000 satisfied learners spread across the globe.


Question and Answer

Master data management (MDM) is a comprehensive method of enabling an enterprise to link all of its critical data to one file, called a master file, that provides a common point of reference. When properly done, MDM streamlines data sharing among personnel and departments.

  • There are two types of table involved in Dimensional Modeling and this model concept is different from the third normal form. Dimensional data model concept makes use of facts table containing the measurements of the business and dimension table containing the measurement context.

A data movement mode determines how the power center server handles the character data. We choose the data movement in the Informatica server configuration settings. Two types of data movement modes available in Informatica.

It’s a matter of awareness and the problem becoming urgent. We are seeing budgets increased and greater success in closing deals, particularly in the Pharmaceutical and Financial services industries. Forrester predicts MDM will be $6 billion markets by 2010, which is a 60 percent growth rate over the $1 billion MDM market last year. Gartner forecasted that 70 percent of Global 2000 companies will have an MDM solution by the year 2010. These are pretty big numbers

We can export repository and import into the new environment
We can use Informatica deployment groups
We can Copy folders/objects
We can Export each mapping to XML and import in a new environment

It is a repository object that helps in generating, modifying or passing data. In a mapping, transformations make a representation of the operations integrated with service performs on the data. All the data goes by transformation ports that are only linked with maple or mapping.

Foreign keys of dimension tables are the primary keys of entity tables.
Foreign keys of facts tables are the primary keys of dimension tables.

A Mapplet is a reusable object that contains a set of transformations and enables to reuse that transformation logic in multiple mappings.

There are two different ways to load data in dimension tables.
Conventional (Slow) – All the constraints and keys are validated against the data before, it is loaded; this way data integrity is maintained.
Direct (Fast) – All the constraints and keys are disabled before the data is loaded. Once data is loaded, it is validated against all the constraints and keys. If data is found invalid or dirty it is not included in the index and all future processes are skipped on this data. 

Designed by Informatica Corporation, it is data integration software providing an environment that lets data loading into a centralized location like a data warehouse. From here, data can be easily extracted from an array of sources, also can be transformed as per the business logic and then can be easily loaded into files as well as relation targets.

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