Date post: | 21-Dec-2015 |
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Where to Find it:
• www.eclipse.org• www.eclipse.org/articles• www.eclipse.org/newsgroups• www.eclipse.org/eclipse/development/main.html
Install and run:
• Download and decompress in install directory
• Does not modify registry• Repeat to reinstall• No hidden spy-ware• (Re)installation is painless• Install your own Java jre or jdk beforehand• Run eclipse.exe; make your own shortcut, etc
C:\Program Files\eclipse
What is a Perspective?
• Collection of views (not editable) and editors
• Good for a particular task– Resource Perspective: managing files (functionality found in
the java perspective)– Java Perspective: developing java code– Debug Perspective: debugging java code
• Three views in this perspective: – Navigator: displays file system– Task: lists outstanding tasks– Outline: presents outline (if it exists) of other resources
work, work, work
Workbench versus Workspace
• Workspace:– Asked at first startup to specify file system location. This
becomes your workspace.– Put it outside the Eclipse home directory (for easy re-install)– Manages resources, grouped as projects– Handles communication between components– You can have several workspaces
• Workbench:– Displays menus and toolbars (perspectives decide which)– Looks “native”
The Eclipse Platform
The eclipse platform kernel
Workspace Component Workbench Component
Team Component (CVS) Help Component (XML)
JDT plug-in PDE plug-in Additional Plug-in
Additional Plug-in
native code
basic GUI
extensibleCVSclient
managesresources
java devtool plug-in devtoolplug-ins come with their ownperspectives, views, editors, etc roll-your-own
Multiplicity:
• You can start up multiple Eclipse windows
(Java and Debug Perspectives for example)• You can have multiple Eclipse installs unzipped in
different install directories.• When testing new plug-ins there is even a “runtime
workbench” so you won’t mess up your current work environment.
Default perspective:
• Since we want to develop java code the default perspective for us is the Java Perspective
Select Window/Preferences…/General/Perspectivesand from the Available List select Java and click on Make Default.
First Java Project:
• Select File/New/Project/Java Project
and click on Next• The following window appears
A new java project:
Becomes the subdirectorywhere project files stored
Separate src and bindirectories
Perspectives, Views and Editors:
The Workbench hasseveral perspectives;only one is visible at a time.
A perspective is a collection of views and editorsthat also appearin differentperspectives
ResourceJavaDebugPerletc
NavigatorPackageConsoleTasksetc
JDT Java code editorXML editorMocrosoft Wordetc
WorkBench
PerspectiveView Editor
* * * *
*
*
Views vs Editors:
• Views display data without the ability to edit• Editors edit!• Views and Editors get stacked• Select
Window/Preferences/General/Editors/File Associations
to associate editors with file extensions• Double clicking on a Java class in the Package View
opens the Java editor on the .java file. • Perspectives come with a predefined (but modifiable) set
of Views and Editors
The Java Perspective
Project
Classfiles and
contents
Java file editor
Classoutline
Output window
List of allopen projects(deleting aproject fromthis view does notdelete theproject fromthe filesystem)
Perspectivetoolbar
Creating a Java class:
• Click on circled-C icon• Select File/New/Class• Right-click Package Explorer View and select New/Class
New Java class dialog
Typically theproject folder
Name of theclass
Get used to “packaging” your java classes
Java coding:
• Code Assist prompts with method/variable names• Invoked by typing . operator or Ctrl-space.• Editor red-lines syntax errors (with fix hints)• Reformat by selecting Source/Format• Modify Code Assist by selecting
Window/Preferences/Java Editor/Code Assist• Quick Fix suggests code fixes. Hover over error/light
bulb icon in left margin marker bar • Minimize comments and method bodies
Scrapbook:
• Create a new scrapbook page
File/New/Other/(Java Run/Debug)/Scrapbook Page
The file extension will automatically be .jpage.• From here you can execute code snippets by following
the steps on the following slide.• If you need to import other packages right click the
scrapbook editor and select Set Imports.
Using the Scrapbook:
1: Double clickthe PackageView scrapbookentry to openan editor.
2: Copy or type code to be executedinto the editor
3: Select the code you want to execute
4: Right click theeditor window andselect Execute
5: View the output in the Console window
How you include import statements
The Package Explorer:
• Deleting projects from this view doesn’t delete them from the file system
• Open an existing project by importing it to this view. Select File/Import