import java.lang.reflect.Method;

public class JI9040211 {
	public static void main(String[] args) throws Exception { 
		final JI9040211 self = new JI9040211(); 
		// This count is used to decide when to pass an invalid number of arguments to the method during the reflection call. 
		// This should be sufficiently high to reproduce the NPE, since the JRE generates the dynamic (internal) method invoker 
		// after the method has been invoked a good number of times. 
		final int warmupCount = 500; 
		for (int i = 0; i < 1000; i++) { 
			final Method method = self.getClass().getMethod("doSomething", String.class); 
			if (i > warmupCount) { 
				// intentionally pass wrong argument 
				method.invoke(self, null); 
			} else { 
				method.invoke(self, "test-" + i); 
			} 
		} 
	}
		public void doSomething(final String foo) { 
			System.out.println(foo); 
		} 
	}