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Презентация на тему Computer Programming Essentials| Java | Java Technologies
Содержание
- 2. AgendaComputer ProgrammingCompilation vs. InterpretationHistory of JavaMain Features
- 3. Computer ProgrammingCompilation vs. InterpretationIT Recruiter Course 2015
- 4. Computer ProgrammingProgramming – process that leads from
- 5. Computer ProgrammingCreating a sequence of instructions to enable the computer to do somethingIT Recruiter Course 2015
- 6. Computer Programming AlgorithmThe algorithm is often only
- 7. CompilationTranslation of source code into machine codeIT Recruiter Course 2015
- 8. Compiled LanguageA compiled language is one where
- 9. Interpreted LanguageAn interpreted language is one where
- 10. Compiler vs. InterpretedIT Recruiter Course 2015
- 11. Compiler LanguagePros:Faster performance by directly using the
- 12. Interpreted LanguagePros:Easier to implementNo need to run
- 13. Why is This Important to Recruiter?Programming language
- 14. JavaHistory of Java. Main Features of Java. JDK. History of Releases.IT Recruiter Course 2015
- 15. History of JavaJava language was originally developed
- 16. Main FeaturesThere were 5 primary goals in
- 17. Simple, Object-oriented and FamiliarJava can be programmed
- 18. Robust & SecureJava provides extensive compile-time checking,
- 19. Architecture Neutral and PortableJava is intended to
- 20. Architecture Neutral and PortableJava applications are compiled
- 21. Architecture Neutral and PortableIT Recruiter Course 2015
- 22. High PerformanceJava has a lot of optimization
- 23. High PerformanceJava performance is generally:slower than compiled
- 24. Java Development KitJDK contains tools for developing,
- 25. Java Version HistoryJDK Alpha and Beta (1995)JDK
- 26. Java PlatformConsists of distinct, but interrelated technologies:The
- 27. Java Platform EditionsJava Card – a technology
- 28. Java Platform EditionsJava SE (Standard Edition) –
- 29. Why is This Important to Recruiter?Java is
- 30. Java TechnologiesServlet. JSP. JDBC. Hibernate. Swing. Spring Framework. IT Recruiter Course 2015
- 31. Web ApplicationJava Web Application Request HandlingIT Recruiter Course 2015
- 32. Web ApplicationIT Recruiter Course 2015
- 33. ServletJava programming language class used to extend
- 34. Java Server Pagestechnology that helps to create
- 35. Java Database Connectivity (JDBC)is an API for
- 36. Hibernateobject-relational mapping (ORM) library for the Java
- 37. SwingPrimary Java GUI widget toolkitIT Recruiter Course 2015
- 38. Spring Frameworkis an open-source application framework and
- 39. Why is This Important to Recruiter?Java technology
- 40. Examples of Java ProjectsReal anonymized descriptionsIT Recruiter Course 2015
- 41. Project #1Web application with user interfaceMain technologies:Java
- 42. Project #2Web applicationMain technologies:Java 6.x, C++, CORBAHibernate,
- 43. Скачать презентацию
- 44. Похожие презентации
AgendaComputer ProgrammingCompilation vs. InterpretationHistory of JavaMain Features of JavaJDKHistory of ReleasesJava PlatformsJava TechnologiesExamples of Java ProjectsIT Recruiter Course 2015
Слайд 2
Agenda
Computer Programming
Compilation vs. Interpretation
History of Java
Main Features of
Java
Course 2015
Слайд 4
Computer Programming
Programming – process that leads from an
original formulation of a computing problem to executable programs.
Usually it includes:
analysis, understanding, and generically solving such problems resulting in an algorithm
coding of the algorithm in a target programming language
testing, debugging, and maintaining the source code
IT Recruiter Course 2015
Слайд 5
Computer Programming
Creating a sequence of instructions
to enable
the computer to do something
IT Recruiter Course 2015
Слайд 6
Computer Programming Algorithm
The algorithm is often only represented
in human-parseable form and reasoned about using logic.
Source code
is written in one or more programming languages, e.g. C++, C#, Java, Python, JavaScript, etc.IT Recruiter Course 2015
Слайд 8
Compiled Language
A compiled language is one where the
program, once compiled, is expressed in the instructions of
the target machine.For example, an addition "+" operation in your source code
could be translated directly to the "ADD" instruction in machine code.
IT Recruiter Course 2015
Слайд 9
Interpreted Language
An interpreted language is one where the
instructions are not directly executed by the the target
machine, but instead read and executed by some other program (which normally is written in the language of the native machine).For example, the same "+" operation would be recognized by the interpreter at run time, which would then call its own "add(a,b)" function with the appropriate arguments, which would then execute the machine code "ADD" instruction.
IT Recruiter Course 2015
Слайд 11
Compiler Language
Pros:
Faster performance by directly using the native
code of the target machine
Opportunity to apply quite powerful
optimizations during the compile stageCons:
writing good compilers is very hard
IT Recruiter Course 2015
Слайд 12
Interpreted Language
Pros:
Easier to implement
No need to run a
compilation stage, i.e. can execute code directly "on the
fly”Can be more convenient for dynamic languages
Cons:
Slow to execute because each statement had to be interpreted into machine code every time it was executed
IT Recruiter Course 2015
Слайд 13
Why is This Important to Recruiter?
Programming language is
just a tool, but usually Ukrainian developers are tight
to specific language, sometimes first language, and stick with it for a long timeIdentity and preferences to specific programming language can sometimes explain professional philosophy of the engineer
IT Recruiter Course 2015
Слайд 14
Java
History of Java. Main Features of Java. JDK.
History of Releases.
IT Recruiter Course 2015
Слайд 15
History of Java
Java language was originally developed by
James Gosling at Sun Microsystems, which is now a
subsidiary of Oracle Corporation, and released in 1995 as a core component of Sun Microsystems' Java platform.Java has derived much of its syntax from C/C++, but it has fewer low-level facilities than either of them.
IT Recruiter Course 2015
Слайд 16
Main Features
There were 5 primary goals in the
creation of the Java language.
It should:
be simple, object-oriented
and familiarrobust and secure
be architecture-neutral and portable
execute with high performance
be interpreted, threaded, and dynamic
IT Recruiter Course 2015
Слайд 17
Simple, Object-oriented and Familiar
Java can be programmed without
extensive programmer training.
The needs of distributed, client-server based systems
coincide with the encapsulated, message-passing paradigms of object-based software.It looks like C++ as far as possible results in it being a familiar language, while removing the unnecessary complexities of C++.
IT Recruiter Course 2015
Слайд 18
Robust & Secure
Java provides extensive compile-time checking, followed
by a second level of run-time checking.
Java technology is
designed to operate in distributed environments, which means that security is of paramount importance.IT Recruiter Course 2015
Слайд 19
Architecture Neutral and Portable
Java is intended to let
application developers “write once, run anywhere”, meaning that code
that runs on one platform does not need to be recompiled to run on anotherIT Recruiter Course 2015
Слайд 20
Architecture Neutral and Portable
Java applications are compiled to
byte code (.class file) –architecture neutral intermediate format designed
to transport code efficiently to multiple hardware and software platforms.Byte code can run on any Java virtual machine (JVM) regardless of computer architecture.
JVM is a virtual machine, i.e. a machine running inside your real machine (Windows, Linux, Mac) written specifically for the host hardware.
IT Recruiter Course 2015
Слайд 22
High Performance
Java has a lot of optimization techniques:
Just-In-Time
compilation (the program is stored in memory as byte
code, but the code segment currently running is preparatively compiled to physical machine code in order to run faster)Adaptive optimization
Garbage Collection
IT Recruiter Course 2015
Слайд 23
High Performance
Java performance is generally:
slower than compiled languages
such as C or C++
similar to other Just-in-time compiled
languages such as C#much faster than languages without an effective native-code compiler (JIT or AOT), such as Perl, Ruby, PHP and Python
IT Recruiter Course 2015
Слайд 24
Java Development Kit
JDK contains tools for developing, debugging,
and monitoring Java applications. For instance:
javac – the Java
compiler, which converts source code into Java byte codejava – the loader for Java applications, i.e. java interpreter
jar – the archiver, which packages related class libraries into a single JAR file
IT Recruiter Course 2015
Слайд 25
Java Version History
JDK Alpha and Beta (1995)
JDK 1.0
(January 23, 1996)
JDK 1.1 (February 19, 1997)
Java 2 splits
into J2SE, J2EE, J2MEJ2SE 1.2 (December 8, 1998)
J2SE 1.3 (May 8, 2000)
J2SE 1.4 (February 6, 2002)
J2SE 5.0 (September 30, 2004)
Java SE 6 (December 11, 2006)
Java SE 7 (July 28, 2011)
Java SE 8 (March 18, 2014)
Java SE 8 Update 66 (October 21, 2015)
IT Recruiter Course 2015
Слайд 26
Java Platform
Consists of distinct, but interrelated technologies:
The Java
Virtual Machine (JVM)
Class loaders and class files
The JVM languages,
e.g. Java, Groovy, Scala, ClosureThe APIs
The set of APIs is controlled by Sun Microsystems in cooperation with others through the Java Community Process program.
IT Recruiter Course 2015
Слайд 27
Java Platform Editions
Java Card – a technology that
allows small Java-based applications to be run securely on
smart cards and similar small-memory devicesJava ME (Micro Edition) – specifies several different sets of libraries for devices with limited storage, display, and power capacities. Often used to develop applications for mobile devices, PDAs, TV set-top boxes, and printers.
IT Recruiter Course 2015
Слайд 28
Java Platform Editions
Java SE (Standard Edition) – for
general-purpose use on desktop PCs, servers and similar devices
Java
EE (Enterprise Edition) – test Java SE plus various APIs useful for multi-tier client–server enterprise applicationsIT Recruiter Course 2015
Слайд 29
Why is This Important to Recruiter?
Java is just
an example, but good recruiter needs to:
know specificity of
the language he/she is hiring forknow latest version of the language, so he/she should understands relevance and freshness of the project for which he/she is hiring
use correct naming in the job description
etc.
IT Recruiter Course 2015
Слайд 30
Java Technologies
Servlet. JSP. JDBC. Hibernate. Swing. Spring Framework.
IT Recruiter Course 2015
Слайд 33
Servlet
Java programming language class used to extend the
capabilities of a server by providing dynamic web content
part
of Java SEto deploy and run servlet, a compatible web server with a servlet container, such as Apache Tomcat or Jetty, is required
IT Recruiter Course 2015
Слайд 34
Java Server Pages
technology that helps to create dynamically
generated web pages based on HTML, XML
JSP allows dynamic
Java code to be combined with static web markup content, with the resulting page being compiled and executed on the server to deliver a dynamic documentto deploy and run JavaServer Pages, a compatible web server with a servlet container, such as Apache Tomcat or Jetty, is required
IT Recruiter Course 2015
Слайд 35
Java Database Connectivity (JDBC)
is an API for the
Java programming language that defines how a client may
access a databaseprovides methods for querying and updating data in a database
is a part of Java SE
is oriented towards relational databases
supports multiple drivers, e.g. for MySQL, Oracle, Postgres, etc.
IT Recruiter Course 2015
Слайд 36
Hibernate
object-relational mapping (ORM) library for the Java language,
providing a framework for mapping an object-oriented domain model
to a traditional relational database.generates SQL calls and relieves the developer from manual result set handling and object conversion
IT Recruiter Course 2015
Слайд 38
Spring Framework
is an open-source application framework and inversion
of control container for the Java platform
has become popular
in the Java community as an alternative to the Enterprise JavaBean (EJB) model used in JEE Platformhas a lot of modules
IT Recruiter Course 2015
Слайд 39
Why is This Important to Recruiter?
Java technology stack
is just an example, but good recruiter needs to:
read
and understand candidate’s technical profileunderstand high-level project requirements
read, understand and/or write correct job description
etc.
IT Recruiter Course 2015
Слайд 41
Project #1
Web application with user interface
Main technologies:
Java 6.x,
Javascript
JDBC, Hibernate
Spring 3.x
Spring MVC, JSP
Spring RESTful services
HTML/CSS/JS, JQuery, Raphael.js,
AngularJSDatabase: MySQL
Servers: Jetty
Build Tools: Maven
Version Control: Git
IT Recruiter Course 2015
Слайд 42
Project #2
Web application
Main technologies:
Java 6.x, C++, CORBA
Hibernate, JDBC
EJB
3
Spring
Swing
Database: Oracle, H2
Servers: JBoss, Tomcat
Build Tools: Ant, Maven
Version
Control: SVNIT Recruiter Course 2015
