Java inner local sub function/method

/**
 * @author lautturi.com 
 * Java example: # Java local sub function/method example
 */

import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.function.Function;

public class Lautturi {
	public static void main(String[] args) {
		Function<String, String> tribleConcat = v -> v+v+v;
		System.out.println(tribleConcat.apply("ABC")); 
	}
}

output:

ABCABCABC