Difference between revisions of "User:Qinzhi"
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Actually Library.java is a class, I'm going to use it as an example | Actually Library.java is a class, I'm going to use it as an example | ||
instead of student.java. | instead of student.java. | ||
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6. Renaming Java elements | 6. Renaming Java elements | ||
I changed Video.java to Audio.java by changing the interface name. | I changed Video.java to Audio.java by changing the interface name. | ||
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click yes. Then the program will stop at La.addMedia(a). | 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 choose run->step into in the menu to follow the program. | ||
+ | I can click run->terminate to end the debugging. | ||
13.Evaluating expressions | 13.Evaluating expressions | ||
14.Evaluating snippets | 14.Evaluating snippets | ||
15.Using the Java browsing perspective | 15.Using the Java browsing perspective | ||
16.Writing and running JUnit tests | 16.Writing and running JUnit tests |
Revision as of 18:57, 2 February 2011
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. 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 14.Evaluating snippets 15.Using the Java browsing perspective 16.Writing and running JUnit tests