package javaapplication4;

import java.util.HashMap;
import java.util.Iterator;
import java.util.TreeMap;
import java.util.ArrayList;
import java.util.Random;
import java.util.List;
import java.util.Collection;
import java.util.Collections;
import java.util.ArrayList;
import java.util.Collections;

// hashmap test class
public class HashmapKlasse {

    public static void main(String args[]) {

        HashMap<Integer,String> hashMap = new HashMap<Integer,String>();
        ArrayList<Integer>  List = new ArrayList<Integer>();

        hashMap.put(999, "Sinka");
        hashMap.put(314, "Pi");
        hashMap.put(13, "Redde seg den som kan");
        hashMap.put(42, "Dagros");


        // hashmap empty check
        boolean isHashMapEmpty = hashMap.isEmpty();
        System.out.println("HashMap Empty: " + isHashMapEmpty);

        // hashmap size
        System.out.println("HashMap Size: " + hashMap.size());

        // hashmap iteration and printing
        Iterator<Integer> keyIterator = hashMap.keySet().iterator();
        while(keyIterator.hasNext()) {
            Integer key = keyIterator.next();
            System.out.println("Seilnr=" + key + "  Båt=" + hashMap.get(key));
        }

        ArrayList<Integer>  lista = new ArrayList<Integer>();
        //RegistrerMallgang
        lista.add(999);
        lista.add(314);
        lista.add(13);
        lista.add(42);

        Collections.shuffle(lista);
        System.out.println("Seilnr 1"); System.out.println(lista.get(0));
        System.out.println("Seilnr 2"); System.out.println(lista.get(2));
        System.out.println("Seilnr 3");System.out.println(lista.get(1));
        System.out.println("Seilnr 4");System.out.println(lista.get(3));

        // sorting hashmap
        System.out.println("Unsorted HashMap: " + hashMap);
        TreeMap<Integer,String> sortedHashMap = new TreeMap<Integer,String>(hashMap);
        System.out.println("Sorted HashMap: " + sortedHashMap);




}
}