private static void field(Invocation invocation) {
		long s;
		s = System.currentTimeMillis();
		for (int i = 0; i < COUNT; ++i) {
			++invocation._public;
		}
		System.out.println("public field: " + (System.currentTimeMillis() - s)
				+ " ms");

		s = System.currentTimeMillis();
		for (int i = 0; i < COUNT; ++i) {
			++invocation._protected;
		}
		System.out.println("protected field: "
				+ (System.currentTimeMillis() - s) + " ms");

		s = System.currentTimeMillis();
		for (int i = 0; i < COUNT; ++i) {
			++invocation._default;
		}
		System.out.println("default field: " + (System.currentTimeMillis() - s)
				+ " ms");

		s = System.currentTimeMillis();
		for (int i = 0; i < COUNT; ++i) {
			++invocation._private;
		}
		System.out.println("private field: " + (System.currentTimeMillis() - s)
				+ " ms");
	}