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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.
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