How to programmatically find a java file in eclipse from full classname?

Question

Inside an eclipse plugin, I\'d like to open a file in editor. I know the full package and class name, how can I determine the path of the java file from this?

Answer 1

You also need to know the source folder.

IProject prj = ResourcePlugin.getWorkspace().getRoot().getProject("project-name");
IFile theFile = prj.getFile(sourceFolder + packageName.replace('.','/') + className + ".java");

Generally you specify the file for an editor with an IFile. You can also ask an IFile for variants of the file's path.