1. Java Coding in Eclipse 1 CS440

2. Eclipse basics  Written in Java  Based on Equinox frameworkEquinox  Modular Java specification OSGi (Open Services Gateway initiative)OSGi  Dynamically loaded modules: bundles  Android Development Tools (ADT) plug-in: Bundle CS440 2

3. Eclipse Environments  Java Runtime Environment  Integrated Development Environment (IDE)  Modify eclipse.ini  Java Compiler: .class files  Error messages, autocompletion (ctrl+space)  Application Runtime  Where the android emulator runs  Android Virtual Device (AVD) CS440 3

4. Eclipse basic ingredients  Workspace  File → Switch Workspace → Others  Perspective  Window → Open Perspective → Other  Views and Editors  Java Perspective and Package Explorer  More info at: http://www.vogella.de/articles/Eclipse/article.html #eclipsesui CS440 4

5. Eclipse Workspace  Keeps project state  Organized in directories  Different settings for different workspaces  Ex. AndroidProjects CS440 5

6. Eclipse Projects  Java Project vs Android Project  Different plugins  Builder: generates artifacts  Transforms.class files to.dex files  Association  Open with.. CS440 6

7. Eclipse Views and perspectives  Package explorer  Task list: todo list  Outline: code hierarchy  Problems: compiler errors, builder errors.  Other views? CS440 7

8. New Project: CarDealership  Classes  Car Public void drive(): prints “Going down the road”  Ragtop extends Car  JoyRide  driveCars  Test the Car class using: a main method in the drive cars class Create object: myCar test CS440 8

9. More Java: Object class 9 CS440

10. Objects and classes  Class:  Fields (data)  Methods (procedures)  Class that inherits from another: subtype or subclass  Parent class: supertype or superclass CS440 10

11. Class Trivial  Create a trivial class with:  Fields: private long ctr  Methods: public void incr(): Increases ctr by 1 every time it is called Constructor that takes as input ling initCtr Constructor that initializes ctr to 0 CS440 11

12. Object class and its methods  http://docs.oracle.com/javase/6/docs/api/java/la ng/Object.html http://docs.oracle.com/javase/6/docs/api/java/la ng/Object.html  toString  equals CS440 12

13. Objects, Inheritance, and Polymorphism  Objects of single type can have different behavior  Subtype are declared with extends keyword  Example: Cars! CS440 13

14. Continue Project: CarDealership  Classes  Car Public void drive(): prints “Going down the road”  Ragtop extends Car Extend drive method to: Print: “top down!” Use superclass method Print” “Got the radio on!”  Test ragtop CS440 14

15. Continue Project: CarDealership  Class Joyride: Fields: private Car myCar Methods: Public void park(Car) Assing field mycar to the argument Public Car whatsInTheGarage() Return car Public void letsGo() Call park to park a new Ragtop Call whatsInTheGarage and drive it!  Test JoyRide CS440 15

16. References  Programming Android by Zigurd Mednieks, Laird Dornin, G. Blake Meike, Masumi Nakamura  Eclipse http://www.vogella.de/articles/Eclipse/article.html #eclipsesui CS440 16