Object-Oriented Programming in Java

Transcription

1 CSCI/CMPE 3326 Object-Oriented Programming in Java Course Information, JVM, Compile and Run, IDE, Android Studio Dr. Dongchul Kim Department of Computer Science University of Texas Rio Grande Valley

2 Course Information Instructor: Dr. Dongchul Kim Office: ENGR Homepage: h"p://faculty.utrgv.edu/dongchul.kim/ Office Hours: Mon & Wed, 1:30~2:30pm, by appointment, or anynme the office door is open. Course Web Page: h"p://faculty.utrgv.edu/dongchul.kim/csci3326/

3 Course Information TA Name: Adolfo Gonzalez III Office: ENGR 3.273A Office Hours: TBA

4 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: Link:

5 Textbook OpNonal Title: Head First Java, 2nd EdiNon Author: Kathy Sierra, Bert Bates Publisher: O'Reilly Media, February 9, 2005 ISBN-13: Link: h`p://goo.gl/da6rvy

6 Evaluation Lab Assignments 15% Programming Assignments 25% Exams 40% Project 20%

7 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

8 Rule 2 No late submission No cheating Respect your classmates Frequently check your UTRGV , course website, and blackboard Come to class on time Start HW early Enjoy (Best chance to improve your programming skill)

9 Rule 3 Excuse me Flexible course schedule Bring your laptop with fully charged battery

10 Rule 4 I will do my best You should also do your best Everyday do Java programming

11 The Way Java Works 2. Run your document through a source code compiler. The compiler checks for errors and won t let you compile unnl it s sansfied that everything will run correctly. Source Compiler Output 4. The virtual machine reads and runs the bytecode. Virtual Machine 1. Create a source document. Use an established protocol (in this case, the Java language). 3. The compiler creates a new document, coded into Java bytecode. Any device capable of running Java will be able to interpret/translate this file into something it can run. The compiled bytecode is plamormindependent.

12 What you ll do in Java 2. Compile the Hello.java file by running javac (the compiler applicanon). If you don t have errors, you ll get a second document named Hello.class The compiler-generated Hello.class file is made up of bytecode 4. Run the program by starnng the Java Virtual Machine (JVM) with the Hello.class file. The JVM translates the bytecode into something the underlying plamorm understands, and runs your program. Source Compiler Output Virtual Machine 1. Type your source code. Save as: Hello.java 3. Compiled code: Hello.class

13 Java Compiler and JVM With most programming languages, portability is achieved by compiling a program for each CPU it will run on. Java provides an JVM for each plamorm so that programmers do not have to recompile for different plamorms.

14 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

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

16 Java SE Install Java javase/downloads/index-jsp html

17

18

19 Install Java

20 Install Java

21 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.

22 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.

23 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.

24 Compile The Java compiler is a command line unlity. The command to compile a program is: javac filename.java javac means Java compiler. The.java file extension must be used. Example: To compile a java source code file named Hello.java you would use the command: javac Hello.java

25 Run To run the Java program, you use the java command in the following form: java ClassFilename ClassFilename is the name of the.class file that you wish to execute. However, you do not type the.class extension. For example, to run the program that is stored in the Hello.class file, you would enter the following command: java Hello This command runs the Java interpreter (the JVM) and executes the program.

26 Windows Command Prompt

27 IDE In addinon to the command prompt programs, there are also several Java Integrated Development Environments (IDEs). These environments consist of a text editor, compiler, debugger, and other unlines integrated into a package with a single set of menus. A program is compiled and executed with a single click of a bu`on, or by selecnng a single item from a menu.

28 Most Popular IDE: Eclipse

29 IDE from Oracle: NetBeans

30 Install Eclipse

31 Install Eclipse

32 Install Eclipse

33 Install Eclipse

34 Install Eclipse

35 Install Eclipse

36 Comment The // in line 1 marks the beginning of a comment. The compiler ignores everything from the double slash to the end of the line. Comments are not required, but comments are very important because they help explain what is going on in the program.

37 Lab1-1 Install Eclipse Make a java program that displays hello yourname In the first line of your program, please put a comment with your name and lab number //Dongchul Kim, lab1-1 Save as Hello.java Compile and Run Give a demo to your instructor or TA.

38 Install IDE for Android App

39 Install Android Studio

40 Install Android Studio

41 Install Android Studio

42 Install Android Studio

43 Install Android Studio

44 Hello World for Android App

45 Hello World for Android App

46 Hello World for Android App

47 Hello World for Android App

48 Hello World for Android App

49 Lab1-2 Make a Android app that displays Hello yourname on Android phone Demonstrate it to your instructor!