UML Training Classes in Midland, Texas
Learn UML in Midland, Texas and surrounding areas via our hands-on, expert led courses. All of our classes either are offered on an onsite, online or public instructor led basis. Here is a list of our current UML related training offerings in Midland, Texas: UML Training
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9 December, 2024 - 13 December, 2024 - Introduction to Spring 5 (2022)
16 December, 2024 - 18 December, 2024 - Fast Track to Java 17 and OO Development
9 December, 2024 - 13 December, 2024 - Microsoft Azure AI Fundamentals (AI-900T00)
25 November, 2024 - 25 November, 2024 - Ruby Programming
2 December, 2024 - 4 December, 2024 - See our complete public course listing
Blog Entries publications that: entertain, make you think, offer insight
As part of our Java Tutorials program, we will list a number of interview questions to aid in a better understaing of Java and J2EE and, hopefully, provide a greater likelihood of getting a job. Let us begin with the basics:
1. What is meant by J2EE?
J2EE is an abreviation for Java 2 Platform Enterprise Edition
2. What is the purpose of J2EE?
The purpose of J2EE is to provide a component based platform in a multitier application model with transaction management, web services and reusable component support.
3. What is the tier structure of the typical J2EE application?
A typical J2EE application consists of the following tiers/machines: the client machine (browser/non-browser application), the J2EE server (an application server such as Oracle, JBoss, GlassFish, Tomcat) and a database.
I will begin our blog on Java Tutorial with an incredibly important aspect of java development: memory management. The importance of this topic should not be minimized as an application's performance and footprint size are at stake.
From the outset, the Java Virtual Machine (JVM) manages memory via a mechanism known as Garbage Collection (GC). The Garbage collector
- Manages the heap memory. All obects are stored on the heap; therefore, all objects are managed. The keyword, new, allocates the requisite memory to instantiate an object and places the newly allocated memory on the heap. This object is marked as live until it is no longer being reference.
- Deallocates or reclaims those objects that are no longer being referened.
- Traditionally, employs a Mark and Sweep algorithm. In the mark phase, the collector identifies which objects are still alive. The sweep phase identifies objects that are no longer alive.
- Deallocates the memory of objects that are not marked as live.
- Is automatically run by the JVM and not explicitely called by the Java developer. Unlike languages such as C++, the Java developer has no explict control over memory management.
- Does not manage the stack. Local primitive types and local object references are not managed by the GC.
So if the Java developer has no control over memory management, why even worry about the GC? It turns out that memory management is an integral part of an application's performance, all things being equal. The more memory that is required for the application to run, the greater the likelihood that computational efficiency suffers. To that end, the developer has to take into account the amount of memory being allocated when writing code. This translates into the amount of heap memory being consumed.
Memory is split into two types: stack and heap. Stack memory is memory set aside for a thread of execution e.g. a function. When a function is called, a block of memory is reserved for those variables local to the function, provided that they are either a type of Java primitive or an object reference. Upon runtime completion of the function call, the reserved memory block is now available for the next thread of execution. Heap memory, on the otherhand, is dynamically allocated. That is, there is no set pattern for allocating or deallocating this memory. Therefore, keeping track or managing this type of memory is a complicated process. In Java, such memory is allocated when instantiating an object:
String s = new String(); // new operator being employed String m = "A String"; /* object instantiated by the JVM and then being set to a value. The JVM calls the new operator */
A business rule is the basic unit of rule processing in a Business Rule Management System (BRMS) and, as such, requires a fundamental understanding. Rules consist of a set of actions and a set of conditions whereby actions are the consequences of each condition statement being satisfied or true. With rare exception, conditions test the property values of objects taken from an object model which itself is gleaned from a Data Dictionary and UML diagrams. See my article on Data Dictionaries for a better understanding on this subject matter.
A simple rule takes the form:
if condition(s)
then actions.
An alternative form includes an else statement where alternate actions are executed in the event that the conditions in the if statement are not satisfied:
if condition(s)
then actions
else alternate_actions
It is not considered a best prectice to write rules via nested if-then-else statements as they tend to be difficult to understand, hard to maintain and even harder to extend as the depth of these statements increases; in other words, adding if statements within a then clause makes it especially hard to determine which if statement was executed when looking at a bucket of rules. Moreoever, how can we determine whether the if or the else statement was satisfied without having to read the rule itself. Rules such as these are often organized into simple rule statements and provided with a name so that when reviewing rule execution logs one can determine which rule fired and not worry about whether the if or else statement was satisfied. Another limitation of this type of rule processing is that it does not take full advantage of rule inferencing and may have a negative performance impact on the Rete engine execution. Take a class with HSG and find out why.
Rule Conditions
Tech Life in Texas
Company Name | City | Industry | Secondary Industry |
---|---|---|---|
Dr Pepper Snapple Group | Plano | Manufacturing | Nonalcoholic Beverages |
Western Refining, Inc. | El Paso | Energy and Utilities | Gasoline and Oil Refineries |
Frontier Oil Corporation | Dallas | Manufacturing | Chemicals and Petrochemicals |
ConocoPhillips | Houston | Energy and Utilities | Gasoline and Oil Refineries |
Dell Inc | Round Rock | Computers and Electronics | Computers, Parts and Repair |
Enbridge Energy Partners, L.P. | Houston | Transportation and Storage | Transportation & Storage Other |
GameStop Corp. | Grapevine | Retail | Retail Other |
Fluor Corporation | Irving | Business Services | Management Consulting |
Kimberly-Clark Corporation | Irving | Manufacturing | Paper and Paper Products |
Exxon Mobil Corporation | Irving | Energy and Utilities | Gasoline and Oil Refineries |
Plains All American Pipeline, L.P. | Houston | Energy and Utilities | Gasoline and Oil Refineries |
Cameron International Corporation | Houston | Energy and Utilities | Energy and Utilities Other |
Celanese Corporation | Irving | Manufacturing | Chemicals and Petrochemicals |
HollyFrontier Corporation | Dallas | Energy and Utilities | Gasoline and Oil Refineries |
Kinder Morgan, Inc. | Houston | Energy and Utilities | Gas and Electric Utilities |
Marathon Oil Corporation | Houston | Energy and Utilities | Gasoline and Oil Refineries |
United Services Automobile Association | San Antonio | Financial Services | Personal Financial Planning and Private Banking |
J. C. Penney Company, Inc. | Plano | Retail | Department Stores |
Energy Transfer Partners, L.P. | Dallas | Energy and Utilities | Energy and Utilities Other |
Atmos Energy Corporation | Dallas | Energy and Utilities | Alternative Energy Sources |
National Oilwell Varco Inc. | Houston | Manufacturing | Manufacturing Other |
Tesoro Corporation | San Antonio | Manufacturing | Chemicals and Petrochemicals |
Halliburton Company | Houston | Energy and Utilities | Energy and Utilities Other |
Flowserve Corporation | Irving | Manufacturing | Tools, Hardware and Light Machinery |
Commercial Metals Company | Irving | Manufacturing | Metals Manufacturing |
EOG Resources, Inc. | Houston | Energy and Utilities | Gasoline and Oil Refineries |
Whole Foods Market, Inc. | Austin | Retail | Grocery and Specialty Food Stores |
Waste Management, Inc. | Houston | Energy and Utilities | Waste Management and Recycling |
CenterPoint Energy, Inc. | Houston | Energy and Utilities | Gas and Electric Utilities |
Valero Energy Corporation | San Antonio | Manufacturing | Chemicals and Petrochemicals |
FMC Technologies, Inc. | Houston | Energy and Utilities | Alternative Energy Sources |
Calpine Corporation | Houston | Energy and Utilities | Gas and Electric Utilities |
Texas Instruments Incorporated | Dallas | Computers and Electronics | Semiconductor and Microchip Manufacturing |
SYSCO Corporation | Houston | Wholesale and Distribution | Grocery and Food Wholesalers |
BNSF Railway Company | Fort Worth | Transportation and Storage | Freight Hauling (Rail and Truck) |
Affiliated Computer Services, Incorporated (ACS), a Xerox Company | Dallas | Software and Internet | E-commerce and Internet Businesses |
Tenet Healthcare Corporation | Dallas | Healthcare, Pharmaceuticals and Biotech | Hospitals |
XTO Energy Inc. | Fort Worth | Energy and Utilities | Gasoline and Oil Refineries |
Group 1 Automotive | Houston | Retail | Automobile Dealers |
ATandT | Dallas | Telecommunications | Telephone Service Providers and Carriers |
Anadarko Petroleum Corporation | Spring | Energy and Utilities | Gasoline and Oil Refineries |
Apache Corporation | Houston | Energy and Utilities | Gasoline and Oil Refineries |
Dean Foods Company | Dallas | Manufacturing | Food and Dairy Product Manufacturing and Packaging |
American Airlines | Fort Worth | Travel, Recreation and Leisure | Passenger Airlines |
Baker Hughes Incorporated | Houston | Energy and Utilities | Gasoline and Oil Refineries |
Continental Airlines, Inc. | Houston | Travel, Recreation and Leisure | Passenger Airlines |
RadioShack Corporation | Fort Worth | Computers and Electronics | Consumer Electronics, Parts and Repair |
KBR, Inc. | Houston | Government | International Bodies and Organizations |
Spectra Energy Partners, L.P. | Houston | Energy and Utilities | Gas and Electric Utilities |
Energy Future Holdings | Dallas | Energy and Utilities | Energy and Utilities Other |
Southwest Airlines Corporation | Dallas | Transportation and Storage | Air Couriers and Cargo Services |
training details locations, tags and why hsg
The Hartmann Software Group understands these issues and addresses them and others during any training engagement. Although no IT educational institution can guarantee career or application development success, HSG can get you closer to your goals at a far faster rate than self paced learning and, arguably, than the competition. Here are the reasons why we are so successful at teaching:
- Learn from the experts.
- We have provided software development and other IT related training to many major corporations in Texas since 2002.
- Our educators have years of consulting and training experience; moreover, we require each trainer to have cross-discipline expertise i.e. be Java and .NET experts so that you get a broad understanding of how industry wide experts work and think.
- Discover tips and tricks about UML programming
- Get your questions answered by easy to follow, organized UML experts
- Get up to speed with vital UML programming tools
- Save on travel expenses by learning right from your desk or home office. Enroll in an online instructor led class. Nearly all of our classes are offered in this way.
- Prepare to hit the ground running for a new job or a new position
- See the big picture and have the instructor fill in the gaps
- We teach with sophisticated learning tools and provide excellent supporting course material
- Books and course material are provided in advance
- Get a book of your choice from the HSG Store as a gift from us when you register for a class
- Gain a lot of practical skills in a short amount of time
- We teach what we know…software
- We care…