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 NewSourceFolderWizardPage() {
		super(PAGE_NAME);
		
		setTitle(NewWizardMessages.getString("NewSourceFolderWizardPage.title")); 
		setDescription(NewWizardMessages.getString("NewSourceFolderWizardPage.description"));		 
		
		fWorkspaceRoot= ResourcesPlugin.getWorkspace().getRoot();
		
		RootFieldAdapter adapter= new RootFieldAdapter();
		
		fProjectField= new StringButtonDialogField(adapter);
		fProjectField.setDialogFieldListener(adapter);
		fProjectField.setLabelText(NewWizardMessages.getString("NewSourceFolderWizardPage.project.label")); 
		fProjectField.setButtonLabel(NewWizardMessages.getString("NewSourceFolderWizardPage.project.button"));	 
		
		fRootDialogField= new StringButtonDialogField(adapter);
		fRootDialogField.setDialogFieldListener(adapter);
		fRootDialogField.setLabelText(NewWizardMessages.getString("NewSourceFolderWizardPage.root.label")); 
		fRootDialogField.setButtonLabel(NewWizardMessages.getString("NewSourceFolderWizardPage.root.button")); 
		
		fEditClassPathField= new SelectionButtonDialogField(SWT.PUSH);
		fEditClassPathField.setDialogFieldListener(adapter);
		fEditClassPathField.setLabelText(NewWizardMessages.getString("NewSourceFolderWizardPage.editclasspath.button"));		 
		
		fRootStatus= new StatusInfo();
		fProjectStatus= new StatusInfo();
	}