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/NewSourceFolderWizardPage.java
public void changeControlPressed(DialogField field) {
			packRootChangeControlPressed(field);
		}
		
		
		public void dialogFieldChanged(DialogField field) {
			packRootDialogFieldChanged(field);
		}
	}
	private void packRootChangeControlPressed(DialogField field) {
		if (field == fRootDialogField) {
			IFolder folder= chooseFolder();
			if (folder != null) {
				IPath path= folder.getFullPath().removeFirstSegments(1);
				fRootDialogField.setText(path.toString());
			}
		} else if (field == fProjectField) {
			IJavaProject jproject= chooseProject();
			if (jproject != null) {
				IPath path= jproject.getProject().getFullPath().makeRelative();
				fProjectField.setText(path.toString());
			}
		}
	}	
	
	private void packRootDialogFieldChanged(DialogField field) {
		if (field == fRootDialogField) {
			updateRootStatus();