Collections.sort(testList);

Collections.reverse(testList);

​

// creating object of ArrayList class  

ArrayList<String> list = new ArrayList<String>();   

// adding elements to the ArrayList   

list.add("Volkswagen");   

list.add("Toyota");   

list.add("Porsche");   

list.add("Ferrari");   

list.add("Mercedes-Benz");   

list.add("Audi");   

list.add("Rolls-Royce");  

list.add("BMW");  

// printing the unsorted ArrayList   

System.out.println("Before Sorting: "+ list);   

// Sorting ArrayList in ascending Order   

Collections.sort(list);   

// printing the sorted ArrayList   

System.out.println("After Sorting: "+ list); 

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

​

public class arraylistSorter {

    public static void main(String[] args){

        Scanner input = new Scanner(System.in);

        int size;

        do {

            System.out.print("Enter array size (min: 5): ");

            size = input.nextInt();

        } while (!(size >= 5));

​

        ArrayList<Integer> array = new ArrayList<>(size);

​

        System.out.println("Enter the numbers: ");

        for (int i = 0; i < size; i++) {

            array.add(input.nextInt());

        }

        System.out.println("Unsorted array: "+ array);

​

        Collections.sort(array);

        System.out.println("Sorted array: " + array);

​

        System.out.println("minimum value: ");

        getMinimum(array);

​

        System.out.println("maximum value: ");

        getMaximum(array);

​

    }

    private static void getMinimum (ArrayList<Integer> arr) {

        int min = arr.get(0);

        for (int i = 0; i < arr.size(); i++) {

            if (arr.get(i) < min) {

                min = arr.get(i);

            }

        }

        System.out.println(min);

    }

​

    private static void getMaximum (ArrayList<Integer> arr) {

        int max = arr.get(0);

        for (int i = 0; i < arr.size(); i++) {

            if (arr.get(i) > max) {

                max = arr.get(i);

            }

        }

        System.out.println(max);

    }

​

}

​

ArrayList<ArrayList<String>> yourList = ...

Collections.sort(yourList, new Comparator<ArrayList<String>>() {

    @Override

    public int compare(ArrayList<String> one, ArrayList<String> two) {

        return one.get(1).compareTo(two.get(1));

    }

});

​

Collections.sort(coll); -> helps sort an arraylist.

arrayListObject = (ArrayList<String>) arrayListObject

                     .stream()

                     .sorted()

                     .collect(Collectors.toList());

In

return Arrays.stream(words.split(" "))

                .sorted(Comparator.comparing(s -> Integer.valueOf(s.replaceAll("\\D", ""))))

                .reduce((a, b) -> a + " " + b).get();