AllMetanitLessons/Collections/Map/TreeMaps.java - master - GermanezZ/JavaExercises

AllMetanitLessons/Collections/Map/TreeMaps.java
137 строк5 KB
germa
Уроки по Metanit
04 дек 2024, 20:39
04 дек 2024, 20:3948d575a
package AllMetanitLessons.Collections.Map;

import org.jetbrains.annotations.NotNull;

import java.util.*;

public class TreeMaps {

    public static void main(String[] args) {

        /*TreeMap<Integer, String> states = new TreeMap<>();

        states.put(10,"Germany");
        states.put(2,"Spain");
        states.put(14,"France");
        states.put(3,"Italy");


        System.out.println(states.get(2));

        for (Map.Entry<Integer,String> item : states.entrySet()){
            System.out.printf("Id: %d,\tState: %s\n",item.getKey(),item.getValue());
        }
        System.out.println("---------------------------------------");

        Set<Integer> keys = states.keySet();
        System.out.println(keys);
        System.out.println("---------------------------------------");
        Collection<String> values = states.values();
        System.out.println(values);
        System.out.println("---------------------------------------");


        Map<Integer,String> afterMap = states.tailMap(4,false);
        System.out.println(afterMap);
        System.out.println("---------------------------------------");
        Map<Integer,String> beforeMap = states.headMap(10,true);
        System.out.println(beforeMap);
        System.out.println("---------------------------------------");


        Map.Entry<Integer,String> lastItem = states.lastEntry();

        System.out.printf("Last item has key %d value %s \n",lastItem.getKey(), lastItem.getValue());


        Map<String, Person> people = new TreeMap<String, Person>();
        people.put("1240i54", new Person("Tom"));
        people.put("1564i55", new Person("Bill"));
        people.put("4540i56", new Person("Nick"));

        for(Map.Entry<String, Person> item : people.entrySet()){

            System.out.printf("Key: %s  Value: %s \n", item.getKey(), item.getValue().getName());
        }*/

        TreeMap<Integer, Person> map = new TreeMap<>();
        map.put(1, new Person("German"));
        map.put(2, new Person("Tom"));
        map.put(3, new Person("Artjom"));
        map.put(4, new Person("Den"));
        map.put(5, new Person("Dima"));

        map.replace(4,new Person("Bob"));

        Set<Integer> set = map.keySet();
        System.out.println(set);
        Collection<Person> people = map.values();
        for (Person person : people){
            System.out.printf("Name: %s\n",person.getName());
        }

        for (Map.Entry<Integer, Person> item : map.entrySet()){
            System.out.printf("ID: %d  Name: %s\n", item.getKey(),item.getValue().getName());
        }

        System.out.println("--------------------------");

        Map.Entry<Integer,Person> first = map.firstEntry();
        System.out.printf("First: Id: %d  Name: %s\n",first.getKey(),first.getValue().getName());
        Map.Entry<Integer,Person> last = map.lastEntry();
        System.out.printf("Last: Id: %d  Name: %s\n",last.getKey(),last.getValue().getName());

        Integer firstkey = map.firstKey();
        System.out.printf("First Id: %d \n",firstkey);
        Integer lastkey = map.lastKey();
        System.out.printf("Last: Id: %d \n",lastkey);

        System.out.println("--------------------------");

        Map.Entry<Integer,Person> higher = map.higherEntry(2);
        System.out.printf("Higher than Bob: Id: %d  Name: %s\n",higher.getKey(),higher.getValue().getName());
        Map.Entry<Integer,Person> lower = map.lowerEntry(2);
        System.out.printf("Lower than Bob: Id: %d  Name: %s\n",lower.getKey(),lower.getValue().getName());
        Map.Entry<Integer,Person> celling = map.ceilingEntry(2);
        Map.Entry<Integer,Person> floor = map.floorEntry(2);
        System.out.printf("Celling than Bob: Id: %d  Name: %s\n",celling.getKey(),celling.getValue().getName());
        System.out.printf("Floor than Bob: Id: %d  Name: %s\n",floor.getKey(),floor.getValue().getName());

        System.out.println("--------------------------");

        Map<Integer,Person> tail = map.tailMap(3,true);
        System.out.println("TailSet: ");
        for (Map.Entry<Integer,Person> item : tail.entrySet()){
            System.out.printf("ID: %d  Name: %s\n", item.getKey(),item.getValue().getName());
        }
        Map<Integer,Person> sub = map.subMap(1,true,3,true);
        System.out.println("SubSet: ");
        for (Map.Entry<Integer,Person> item : sub.entrySet()){
            System.out.printf("ID: %d  Name: %s\n", item.getKey(),item.getValue().getName());
        }
        Map<Integer,Person> head = map.headMap(4,true);
        System.out.println("HeadSet: ");
        for (Map.Entry<Integer,Person> item : head.entrySet()){
            System.out.printf("ID: %d  Name: %s\n", item.getKey(),item.getValue().getName());
        }
        Integer higherKey = map.higherKey(2);



    }

}

class Person {
    private final String name;

    public Person(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }


}