Java tutorial
//package com.java2s; //License from project: Open Source License import java.util.ArrayList; public class Main { public static ArrayList<String> sortDaysToTake(ArrayList<String> daysToTake) { ArrayList<String> daysToTakeSorted = new ArrayList<>(); String[] days = { "Su", "Mo", "Tu", "We", "Th", "Fr", "Sa" }; for (String day : days) { if (daysToTake.contains(day)) { daysToTakeSorted.add(day); } } return daysToTakeSorted; } }