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Computer Programming Essentials| Java | Java Technologies Taras Matyashovskyy
Описание слайда:
Computer Programming Essentials| Java | Java Technologies Taras Matyashovskyy

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Agenda Computer Programming Compilation vs. Interpretation History of Java Main Features of Java JDK History of Releases Java Platforms Java Technologies Examples of Java Projects
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Agenda Computer Programming Compilation vs. Interpretation History of Java Main Features of Java JDK History of Releases Java Platforms Java Technologies Examples of Java Projects

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Computer Programming Compilation vs. Interpretation
Описание слайда:
Computer Programming Compilation vs. Interpretation

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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
Описание слайда:
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

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Computer Programming Creating a sequence of instructions to enable the computer to do something
Описание слайда:
Computer Programming Creating a sequence of instructions to enable the computer to do something

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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.
Описание слайда:
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.

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Compilation Translation of source code into machine code
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Compilation Translation of source code into machine code

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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.
Описание слайда:
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.

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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.
Описание слайда:
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.

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Compiler vs. Interpreted
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Compiler vs. Interpreted

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Compiler Language Pros: Faster performance by directly using the native code of the target machine Opportunity to apply quite powerful optimizations during the compile stage Cons: writing good compilers is very hard
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Compiler Language Pros: Faster performance by directly using the native code of the target machine Opportunity to apply quite powerful optimizations during the compile stage Cons: writing good compilers is very hard

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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
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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

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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 time Identity and preferences to specific programming language can sometimes explain professional philosophy of the engineer
Описание слайда:
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 time Identity and preferences to specific programming language can sometimes explain professional philosophy of the engineer

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Java History of Java. Main Features of Java. JDK. History of Releases.
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Java History of Java. Main Features of Java. JDK. History of Releases.

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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.
Описание слайда:
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.

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Main Features There were 5 primary goals in the creation of the Java language. It should: be simple, object-oriented and familiar robust and secure be architecture-neutral and portable execute with high performance be interpreted, threaded, and dynamic
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Main Features There were 5 primary goals in the creation of the Java language. It should: be simple, object-oriented and familiar robust and secure be architecture-neutral and portable execute with high performance be interpreted, threaded, and dynamic

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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++.
Описание слайда:
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++.

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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.
Описание слайда:
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.

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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 another
Описание слайда:
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 another

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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.
Описание слайда:
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.

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Architecture Neutral and Portable
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Architecture Neutral and Portable

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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
Описание слайда:
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

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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
Описание слайда:
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

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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 code java – the loader for Java applications, i.e. java interpreter jar – the archiver, which packages related class libraries into a single JAR file
Описание слайда:
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 code java – the loader for Java applications, i.e. java interpreter jar – the archiver, which packages related class libraries into a single JAR file

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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, J2ME J2SE 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)
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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, J2ME J2SE 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)

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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, Closure The APIs The set of APIs is controlled by Sun Microsystems in cooperation with others through the Java Community Process program.
Описание слайда:
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, Closure The APIs The set of APIs is controlled by Sun Microsystems in cooperation with others through the Java Community Process program.

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Java Platform Editions Java Card – a technology that allows small Java-based applications to be run securely on smart cards and similar small-memory devices Java 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.
Описание слайда:
Java Platform Editions Java Card – a technology that allows small Java-based applications to be run securely on smart cards and similar small-memory devices Java 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.

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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 applications
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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 applications

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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 for know 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.
Описание слайда:
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 for know 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.

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Java Technologies Servlet. JSP. JDBC. Hibernate. Swing. Spring Framework.
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Java Technologies Servlet. JSP. JDBC. Hibernate. Swing. Spring Framework.

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Web Application Java Web Application Request Handling
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Web Application Java Web Application Request Handling

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Web Application
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Web Application

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Servlet Java programming language class used to extend the capabilities of a server by providing dynamic web content part of Java SE to deploy and run servlet, a compatible web server with a servlet container, such as Apache Tomcat or Jetty, is required
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Servlet Java programming language class used to extend the capabilities of a server by providing dynamic web content part of Java SE to deploy and run servlet, a compatible web server with a servlet container, such as Apache Tomcat or Jetty, is required

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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 document to deploy and run JavaServer Pages, a compatible web server with a servlet container, such as Apache Tomcat or Jetty, is required
Описание слайда:
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 document to deploy and run JavaServer Pages, a compatible web server with a servlet container, such as Apache Tomcat or Jetty, is required

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Java Database Connectivity (JDBC) is an API for the Java programming language that defines how a client may access a database provides 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.
Описание слайда:
Java Database Connectivity (JDBC) is an API for the Java programming language that defines how a client may access a database provides 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.

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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
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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

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Swing Primary Java GUI widget toolkit
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Swing Primary Java GUI widget toolkit

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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 Platform has a lot of modules
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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 Platform has a lot of modules

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Why is This Important to Recruiter? Java technology stack is just an example, but good recruiter needs to: read and understand candidate’s technical profile understand high-level project requirements read, understand and/or write correct job description etc.
Описание слайда:
Why is This Important to Recruiter? Java technology stack is just an example, but good recruiter needs to: read and understand candidate’s technical profile understand high-level project requirements read, understand and/or write correct job description etc.

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Examples of Java Projects Real anonymized descriptions
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Examples of Java Projects Real anonymized descriptions

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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, AngularJS Database: MySQL Servers: Jetty Build Tools: Maven Version Control: Git
Описание слайда:
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, AngularJS Database: MySQL Servers: Jetty Build Tools: Maven Version Control: Git

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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: SVN
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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: SVN

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Use real world and practice! Let us find something interesting on DOU.ua, rabota.ua, hh.ua, etc?!
Описание слайда:
Use real world and practice! Let us find something interesting on DOU.ua, rabota.ua, hh.ua, etc?!

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