メソッド参照@Java

		var list = new ArrayList<String>(){{
			add("tanaka");
			add("Tomita");
			add("ito");
			add("kenmoto");
		}};
		list.forEach(System.out::println);

tanaka
Tomita
ito
kenmoto

String[] names = {"tanaka", "Tomita", "ito", "Kenmoto"};
		Arrays.sort(names, String::compareToIgnoreCase);
		System.out.println(Arrays.toString(names));

[ito, Kenmoto, tanaka, Tomita]