src/macosx/classes/sun/lwawt/macosx/CDataTransferer.java

*** 180,189 ****
--- 180,193 ----
  
      synchronized protected Long getFormatForNativeAsLong(String str) {
          Long format = predefinedClipboardNameMap.get(str);
  
          if (format == null) {
+             if (java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment().isHeadlessInstance()) {
+                 // Do not try to access GUI manager for unknown format
+                 return new Long(-1);
+             }
              format = new Long(registerFormatWithPasteboard(str));
              predefinedClipboardNameMap.put(str, format);
              predefinedClipboardFormatMap.put(format, str);
          }