Bug 10403 Project creation should confirm the bin directory can be scrubbed
When a user creates a new project for an existing directory structure, we should confirm that the output directory can be deleted then rebuilt. Some users are creating projects & pointing the output folder at a bin directory which contains more than just .class files which can be rebuilt from the available .java files.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/BuildPathsBlock.java
item.setImage(cpoImage);
		item.setData(ordpage);
		item.setControl(ordpage.getControl(folder));
				
		if (fCurrJProject != null) {
			fSourceContainerPage.init(fCurrJProject);
			fLibrariesPage.init(fCurrJProject);
			fProjectsPage.init(fCurrJProject);
		}		
						
		Composite editorcomp= new Composite(composite, SWT.NONE);	
	
		DialogField[] editors= new DialogField[] { fBuildPathDialogField };
		LayoutUtil.doDefaultLayout(editorcomp, editors, true, 0, 0);
		
		int maxFieldWidth= converter.convertWidthInCharsToPixels(40);
		LayoutUtil.setWidthHint(fBuildPathDialogField.getTextControl(null), maxFieldWidth);
		LayoutUtil.setHorizontalGrabbing(fBuildPathDialogField.getTextControl(null));
	
		editorcomp.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		
		if (fShowSourceFolderPage) {
			folder.setSelection(0);
			fCurrPage= fSourceContainerPage;
		} else {
			folder.setSelection(3);
			fCurrPage= ordpage;
			fClassPathList.selectFirstElement();
		}
		WorkbenchHelp.setHelp(composite, IJavaHelpContextIds.BUILD_PATH_BLOCK);