java 收集についてNavigableMapSample

Posted 2021-05-08

class NavigableMapSample {
	public static void main(String... args) {
		NavigableMap<String, String> map = new TreeMap<>();
		map.put("ichi", "one");
		map.put("ni", "two");
		map.put("san", "three");
		Map.Entry<String, String> entry = map.ceilingEntry("ic");
		if (entry != null) {
			System.out.println(entry.getKey() + ": " + entry.getValue());
		}
	}
}