import java.io.*;
import java.util.*;

public class Main
{
	public static void main(String[] args)
	{
		List<String> c = new ArrayList<>(); c.add("Helena");c.add("Kit");c.add("Jason");
		System.out.println(c); //Output: [Helena, Kit, Jason]
		
		//Shuffling
		Collections.shuffle(c);	System.out.println(c); //May output: [Kit, Helena, Jason]
		Collections.shuffle(c); System.out.println(c); //May output: [Kit, Jason, Helena]
		
		//Sorting
		Collections.sort(c); System.out.println(c); //Output: [Helena, Jason, Kit]
		
		//Binary search
		System.out.println(Collections.binarySearch(c,"Helena")); //returns the index: 0
		
		//Others:
		System.out.println(Collections.min(c)); //Output: Helena
		System.out.println(Collections.max(c)); //Output: Kit
		Collections.reverse(c); System.out.println(c); //Output: [Kit, Jason, Helena]
		Collections.rotate(c,2); System.out.println(c); //rotate by 2 positions: [Jason, Helena, Kit]
		System.out.println(Collections.frequency(c,"Helena")); //Output: 1		
		System.out.println(Collections.disjoint(c, Arrays.asList("Ada", "Kit"))); //Output: false (Output is true if no elements in common)

	}
}