Object-Oriented Programming in Javafaculty.utrgv.edu/dongchul.kim/CSCI3326/01_intro.pdf · ... Head...

CSCI/CMPE 3326

Object-Oriented Programming in Java

Dr. Dongchul Kim

Department of Computer Science University of Texas Rio Grande Valley

Course Information, JVM, Compile and Run, IDE, Android Studio

Course Information •  Instructor:Dr.DongchulKim•  Office:ENGR3.272•  Email:[email protected]•  Homepage:h"p://faculty.utrgv.edu/dongchul.kim/•  OfficeHours:Mon&Wed,1:30~2:30pm,byappointment,

oranyNmetheofficedoorisopen.•  CourseWebPage:

–  h"p://faculty.utrgv.edu/dongchul.kim/CSCI3326/

Course Information •  TAName:AdolfoGonzalezIII•  Email:[email protected]•  Office:ENGR3.273A•  OfficeHours:TBA

Textbook •  OpNonal•  Title: Starting Out with Java: From Control Structures •  Through Objects, 6th Edition •  Author: Tony Gaddis •  Publisher: Addison-Wesley, March 22, 2015 •  ISBN-13: 978-0133957051 •  Link: http://goo.gl/lHXMxJ

Textbook •  OpNonal•  Title:HeadFirstJava,2nd

EdiNon•  Author:KathySierra,BertBates•  Publisher:O'ReillyMedia,

February9,2005•  ISBN-13:978-0596009205•  Link:h`p://goo.gl/dA6rVy

Evaluation •  LabAssignments15%•  ProgrammingAssignments25%•  Exams40%•  Project20%

Rule 1 •  Any OS is okay (Windows, Mac OS, Linux,

Chrome OS, and so on) •  Please come to my office if you couldn’t

understand the course materials •  or ask TA •  Please don’t be shy •  There is no such thing as a stupid question

–  Exception? –  Respect your classmates

Rule 2 •  No late submission •  No cheating

–  Respect your classmates

•  Frequently check your UTRGV email, course website, and blackboard

•  Come to class on time •  Start HW early •  Enjoy (Best chance to improve your

programming skill)

Rule 3

•  Excuse me – Flexible course schedule

•  Bring your laptop with fully charged battery

Rule 4

•  I will do my best •  You should also do your best

– Everyday do Java programming

The Way Java Works

Source Compiler Output Virtual Machine

1.Createasourcedocument.Useanestablishedprotocol(inthiscase,theJavalanguage).

2. Run your document through a sourcecode compiler. The compiler checks forerrorsandwon’tletyoucompileunNlit’ssaNsfiedthateverythingwillruncorrectly.

3. The compiler creates a new document, codedintoJavabytecode.AnydevicecapableofrunningJavawillbeabletointerpret/translatethisfileintosomething it can run. The compiled bytecode isplamormindependent.

4.Thevirtualmachinereadsandrunsthebytecode.

What you’ll do in Java

Source Compiler Output Virtual Machine

1.Typeyoursourcecode.Saveas:Hello.java

2. Compile theHello.javafile by runningjavac (the compiler applicaNon). If youdon’t have errors, you’ll get a seconddocumentnamedHello.classThe compiler-generatedHello.class file ismadeupofbytecode

4.RuntheprogrambystarNngtheJava Virtual Machine (JVM) withthe Hello.class file. The JVMtranslates the bytecode intosomethingtheunderlyingplamormunderstands, and runs yourprogram.

3.Compiledcode:Hello.class

Java Compiler and JVM • Withmostprogramminglanguages,portabilityisachievedbycompilingaprogramforeachCPUitwillrunon.

•  JavaprovidesanJVMforeachplamormsothatprogrammersdonothavetorecompilefordifferentplamorms.

Java Software Edition •  The software you use to write Java programs is

called the Java Development Kit, or JDK. •  There are different editions of the JDK:

–  Java SE – Standard Edition •  Provides essential tools for developing applications and applets

–  Java EE – Enterprise Edition •  Provides tools for creating large business applications that employ servers

and provide services over the Web

–  Java ME – Micro Edition •  Provides a small, optimized runtime environment for consumer products

such as cell phones, pagers, and appliances •  Available for download at https://

www.oracle.com/java/index.html

Plz. Memorize Now! **Details will be explained later on.

Install Java •  Java SE •  http://www.oracle.com/technetwork/java/

javase/downloads/index-jsp-138363.html

Install Java

Setting Path in Windows •  Windows 8

–  Drag the Mouse pointer to the Right bottom corner of the screen –  Click on the Search icon and type: Control Panel –  Click on → Control Panel → System → Advanced –  Click on Environment Variables, under System Variables, find PATH, and click on it. –  In the Edit windows, modify PATH by adding the location of the class (e.g. C:\Program Files\Java

\jdk1.8.0_31\bin\) to the value for PATH. If you do not have the item PATH, you may select to add a new variable and add PATH as the name and the location of the class as the value.

–  Close the window. –  Reopen Command prompt window, and run your java code.

•  Windows 7 –  Select Computer from the Start menu –  Choose System Properties from the context menu –  Click Advanced system settings → Advanced tab –  Click on Environment Variables, under System Variables, find PATH, and click on it. –  In the Edit windows, modify PATH by adding the location of the class (e.g. C:\Program Files\Java

\jdk1.8.0_31\bin\) to the value for PATH. If you do not have the item PATH, you may select to add a new variable and add PATH as the name and the location of the class as the value.

–  Reopen Command prompt window, and run your java code.

Setting CLASSPATH Variable •  Right-click the My Computer icon on •  your desktop and select Properties. •  Click the Advanced tab. Click the •  Environment Variables button. Under System Variables, click

New. •  Enter the variable name as CLASSPATH. •  Enter the variable value (e.g. .;) •  The CLASSPATH variable is one way to tell applications,

including the JDK tools, where to look for user classes. •  Click OK. •  Click Apply Changes.

Setting JAVA_HOME Variable •  Right-click the My Computer icon on •  your desktop and select Properties. •  Click the Advanced tab. Click the •  Environment Variables button. Under System Variables, click

New. •  Enter the variable name as JAVA_HOME. •  Enter the variable value (e.g. C:\Program Files\Java\jdk1.8.0_31)

as the installation path for the Java Development Kit. •  Click OK. •  Click Apply Changes.

Compile •  TheJavacompilerisacommandlineuNlity.•  Thecommandtocompileaprogramis:

–  javac filename.java –  javacmeansJavacompiler.

•  The.java fileextensionmustbeused.–  Example:TocompileajavasourcecodefilenamedHello.javayouwouldusethecommand:

– javac Hello.java

Run •  ToruntheJavaprogram,youusethejavacommandinthefollowing

form:–  java ClassFilename

•  ClassFilenameisthenameofthe.class filethatyouwishtoexecute.–  However,youdonottypethe.class extension.

•  Forexample,toruntheprogramthatisstoredintheHello.classfile,youwouldenterthefollowingcommand:–  java Hello –  ThiscommandrunstheJavainterpreter(theJVM)andexecutesthe

program.

Windows Command Prompt

IDE •  InaddiNontothecommandpromptprograms,thereare

alsoseveralJavaIntegratedDevelopmentEnvironments(IDEs).

•  Theseenvironmentsconsistofatexteditor,compiler,debugger,andotheruNliNesintegratedintoapackagewithasinglesetofmenus.

•  Aprogramiscompiledandexecutedwithasingleclickofabu`on,orbyselecNngasingleitemfromamenu.

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