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
IRunnableWithProgress runnable= fBuildPathsBlock.getRunnable();
				if (invokeRunnable(runnable)) {
					setReturnCode(OK);
				} else {
					setReturnCode(CANCEL);
				}
			}
			close();
		}
		
		private boolean invokeRunnable(IRunnableWithProgress runnable) {
			IRunnableWithProgress op= new WorkspaceModifyDelegatingOperation(runnable);
			try {
				getWizard().getContainer().run(false, true, op);
			} catch (InvocationTargetException e) {
				Shell shell= getShell();
				String title= NewWizardMessages.getString("NewSourceFolderWizardPage.op_error.title"); 
				String message= NewWizardMessages.getString("NewSourceFolderWizardPage.op_error.message");				 
				ExceptionHandler.handle(e, shell, title, message);
				return false;
			} catch  (InterruptedException e) {
				return false;
			}
			return true;
		}		
	}
	
	private boolean showClassPathPropertyPage() {
		EditClassPathDialog dialog= new EditClassPathDialog(getShell());
		dialog.setTitle(NewWizardMessages.getString("NewSourceFolderWizardPage.EditClassPathDialog.title"));