Class StackWalker

 List<StackFrame> frames = StackWalker.getInstance().walk(s ->
     s.dropWhile(f -> f.getClassName().startsWith("com.foo."))
      .limit(10)
      .collect(Collectors.toList()));
 

This method takes a Function accepting a Stream<StackFrame>, rather than returning a Stream<StackFrame> and allowing the caller to directly manipulate the stream. The Java virtual machine is free to reorganize a thread's control stack, for example, via deoptimization. By taking a Function parameter, this method allows access to stack frames through a stable view of a thread's control stack.

Parallel execution is effectively disabled and stream pipeline execution will only occur on the current thread.

 class Util {
     private final StackWalker walker = StackWalker.getInstance(Option.RETAIN_CLASS_REFERENCE);
     public ResourceBundle getResourceBundle(String bundleName) {
         Class<?> caller = walker.getCallerClass();
         return ResourceBundle.getBundle(bundleName, Locale.getDefault(), caller.getClassLoader());
     }
 }

 class MyTool {
     private final Util util = new Util();
     private void init() {
         ResourceBundle rb = util.getResourceBundle("mybundle");
     }
 }
 

     Optional<Class<?>> caller = walker.walk(s ->
         s.map(StackFrame::getDeclaringClass)
          .skip(2)
          .findFirst());