User:Qinzhi

Basic Lab:

 1. Preparing Eclipse     
    1)Goto Eclipse from http://www.eclipse.org.
    2)Choose Eclipse IDE for java Developers and download it.
    3)Unzip eclipse to c:\eclipse\Basics folder
    4)Doubleclick eclipse.exe in c:\eclipse\Basics\eclipse
    5)Workspace type ./wksp/lab
    6)Download and install SVN according the instruction at
    http://zenit.senecac.on.ca/wiki/index.php/Basics_:_Install_Eclipse_Plugins
    7)Download JUnit from
    https://github.com/KentBeck/junit/downloads and unzip it to c:\junit4.9b2.
    8)Add junit-4.9b2 to the CLASSPATH, for example:
    classpath=.;c:\junit4.9b2\junit-4.9b2.jar;c:\junit4.9b2
    9)Test if junit is installed correct or not by typing:
    java org.junit.runner.JUnitCore org.junit.tests.AllTests
    If it display ok (508 tests), it means junit is installed correctly.
 2. Creating your first Java project
    1)Open our SVN server and export all samples to c:\ecl500samples.
    2)Click Import->existing projects, select c:\ecl500samples\w11-basics-simple,
    check copy projects into workspace.
    3)Edit Library.java by adding System.out.println("Hello"); in main.
    4)Click run, and the console will display Hello.
 3. Browsing Java elements using the package explorer
    In the left side of Eclipse, that is the package explorer.
    Use mouse to expend cs.ecl.basics.simple, I can see src and JRE System Library.
 4. Editing Java element
    I clicked Library.java and added following code:
     @Override
     public String toString() {
         return "Library [resources=" + resources + "]";
     }
 5. Creating a Java class
    In package explorer, right click on src folder, and select new->class,
    type student, and click enter key.
    Actually Library.java is a class, I'm going to use it as an example
    instead of student.java.
 6. Renaming Java elements
    I changed Video.java to Audio.java by changing the interface name.
 7. Moving and copying Java elements
    I copied Audio.java and paste it in the project, and changed name to Video,
    then Video.java is created.
    If I use mouse to move Video.java to Media.java, it's the same as copying.
 8. Navigate to a Java element's declaration
    In Library.java, I hightlight Media, the Media became gray background.
    Then I right click on Media, and select open declearation, it switch to
    Media.java.
 9. Viewing the type Hierarchy
    In Media.java, I hightlight Media, the Media became gray background.
    Then I right click on Media, and select open type hierarchy.
    The left panel show Media as a menu, Audio, Book, Video as sub menu.
 10.Searching the workbench
    In menu, select search, a window pop up.
    I input Audio, and click search.
    At the bottom of eclipse, a window shows 1 match in workspace.
    And it showed public interface Audio extends Media{
    I click on that, it switched to Audio.java.
 11.Running your programs
    I changed the main in Library.java:
    public static void main(String[] args) {
        System.out.println("Hello");
        Audio a = null;
        Library<Audio> La = new Library<Audio>();
        La.addMedia(a);
        System.out.println(La.retrieveLast());
    }
    I clicked run, it shows:
    Hello
    null
 12.Debugging your programs
    In Main procedure, I click the line La.addMedia(a), a blue dot appear
    on the left La.addMedia(a). In menu, I click run->debug. when popup a window,
    click yes. Then the program will stop at La.addMedia(a).
    I can choose run->step into in the menu to follow the program.
    I can click run->terminate to end the debugging.
 13.Evaluating expressions
    In menu, I select window->show view->expressions.
    I added La, Audio and 3+3.
    Then I click debug.
    The program stopped at La.AddMedia(a);
    In expressions window, it shows:
    "La"  (id=16)
    "Audio" <error(s)_during_the_evaluatior
    6
    So expressions can be used in debug mode to check the runtime value.
 14.Evaluating snippets
    snippets used to speed up typing.
    for example: I put Audio.java as a snippet, named InterfaceTemplate,
    and add a variable name_1, default value is "Audio".
    package cs.ecl.basics.simple.example1;
    public interface ${name_1} extends Media {
    }
    I created a DVD.java interface, open it, and I deleted everything in
    DVD.java. Then I drag it to the middle empty place, it popped a window.
    I changed the value of name_1 to DVD. Then DVD.java is created.
 15.Using the Java browsing perspective
    In menu, select Window->Open perspective->Java browsing.
    A new windows arrangement shows:
    The top 4 windows are projects, packages, types and members.
    The bottom window is the program window.
    I can drag what I want from types and members to the bottom window.
    It's very convenience for programming.
 16.Writing and running JUnit tests
    Since the package cs.ecl.basics.simple is already include test folder.
    Also it includes testAddMedia() and testRetrieveLast() functions.
    I clicked run, it shows 2 errors:
    @Test
    public void testAddMedia() {
        fail("Not yet implemented");
    }
    @Test
    public void testRetrieveLast() {
        fail("Not yet implemented");
    }
    I changed to following:
    package cs.ecl.basics.simple.example1;
    import junit.framework.Assert;
    import org.junit.Test;
    public class LibraryTest {
    Library<DVD> Ld = new Library<DVD>();
    @Test
    public void testAddMedia() {
       DVD d = null;
       Ld.addMedia(d);
    }
    @Test
    public void testRetrieveLast() {
       Assert.assertEquals(null,Ld.retrieveLast());
    }
    }
    The program runs correctly.
    Assert.asserEquals is a function to check 2 parameters are equal or not.
    End.