Bug 14421 Old .CLASS Files Are Not Deleted
When creating a project that does NOT use source folders (and does not use a bin directory for .class files) the .java and .class files are stored together in the Java package structure. When converting a project to use source folders (and the required bin directory for .class files), the old .class files stored in the Java package structure are NEVER DELETED by Eclipse. This is a bug for Eclipse 1.0 and 2.0. Since I use WSDD 4.0 (which is built on Eclipse 1.0), I've seen compilation errors due to the fact that the compiler/JDT is using old .class files rather than the new ones in the project's bin directory. I have not managed to reproduce the compile errors in build 20020416. But since the old .class files should have been deleted this is still a bug for the latest build.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/BuildPathsBlock.java
if (path != null) {
					JavaDocLocations.setLibraryJavadocLocation(path, javadocLocation);
				}
			}
		}	
		monitor.worked(1);
			
		fCurrJProject.setRawClasspath(classpath, buildPath, new SubProgressMonitor(monitor, 7));		
	}
	
	
		
	private IContainer chooseContainer() {
		Class[] acceptedClasses= new Class[] { IProject.class, IFolder.class };
		ISelectionStatusValidator validator= new TypedElementSelectionValidator(acceptedClasses, false);
		IProject[] allProjects= fWorkspaceRoot.getProjects();
		ArrayList rejectedElements= new ArrayList(allProjects.length);
		IProject currProject= fCurrJProject.getProject();
		for (int i= 0; i < allProjects.length; i++) {
			if (!allProjects[i].equals(currProject)) {
				rejectedElements.add(allProjects[i]);
			}
		}
		ViewerFilter filter= new TypedViewerFilter(acceptedClasses, rejectedElements.toArray());
		ILabelProvider lp= new WorkbenchLabelProvider();
		ITreeContentProvider cp= new WorkbenchContentProvider();
		IResource initSelection= null;
		if (fOutputLocationPath != null) {
			initSelection= fWorkspaceRoot.findMember(fOutputLocationPath);
		}