Bug 29003 Preferences 'Output Folder Name' needs to allow '/' in the path [build path]
In the window/preferences/Java/New Project panel, when 'Folders' radio button is set, the 'output folder name' cannot be set to something like 'WEB- INF/classes'. The error message "'/' is an invalid character" appears. However, when setting the output path on the project (project/properties), 'WEB- INF/classes' is allowed, as the '/' is valid. Please change the window/preferences to allow a '/' in output folder name, so this value can be set by default.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/NewJavaProjectPreferencePage.java
fBinFolderNameLabel= new Label(sourceFolderGroup, SWT.NONE);
		fBinFolderNameLabel.setText(JavaUIMessages.getString("NewJavaProjectPreferencePage.folders.bin")); 
		fBinFolderNameText= addTextControl(sourceFolderGroup, fBinFolderNameLabel, SRCBIN_BINNAME, indent); 
		fBinFolderNameText.addModifyListener(fModifyListener);
		String[] jreNames= getJRENames();
		if (jreNames.length > 0) {
			Label jreSelectionLabel= new Label(result, SWT.NONE);
			jreSelectionLabel.setText(JavaUIMessages.getString("NewJavaProjectPreferencePage.jrelibrary.label")); 
			jreSelectionLabel.setLayoutData(new GridData());
		
			int index= getPreferenceStore().getInt(CLASSPATH_JRELIBRARY_INDEX);
			fJRECombo= new Combo(result, SWT.READ_ONLY);
			fJRECombo.setItems(jreNames);
			fJRECombo.select(index);
			fJRECombo.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
		}
					
		validateFolders();
	
		return result;
	}
	
	private void validateFolders() {
		boolean useFolders= fFoldersAsSourceFolder.getSelection();
		
		fSrcFolderNameText.setEnabled(useFolders);
		fBinFolderNameText.setEnabled(useFolders);
		fSrcFolderNameLabel.setEnabled(useFolders);
		fBinFolderNameLabel.setEnabled(useFolders);		
		if (useFolders) {