AllMetanitLessons/Collections/Lists/ArrayListProg.java - master - GermanezZ/JavaExercises

AllMetanitLessons/Collections/Lists/ArrayListProg.java

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germa

Уроки по Metanit

04 дек 2024, 20:39

04 дек 2024, 20:3948d575a

package AllMetanitLessons.Collections.Lists;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collections;
import java.util.ListIterator;

public class ArrayListProg  {

    public static void main(String[] args) {

        ArrayList<String> people = new ArrayList<>(10);

        people.add("Tom");
        people.add("Bob");
        people.add("German");
        people.add("Denis");
        people.add("Artjom");
        people.add(1,"Rob");
        people.add("Node");
        people.add("John");

        people.add(1,"Rebecca");
        people.remove("Denis");
        System.out.println(people.contains("Node"));
        System.out.println(people.contains("DDFEFfefef"));

        System.out.println(people.get(0));

        System.out.println("List people has value of elements: " + people.size());

        for (String person: people){
            System.out.println(person);
        }

        ArrayList<Person> personArrayList = new ArrayList<>(5);

        personArrayList.add(new Person("Bob"));
        personArrayList.add(new Person("Tom"));
        personArrayList.add(new Person("Rob"));
        personArrayList.add(new Person("German"));
        personArrayList.add(new Person("John"));

        for (Person person: personArrayList){
            System.out.println(person.say());
        }

        System.out.println("------------LIST ITERATOR--------------");
        ListIterator<String> listIterator = people.listIterator();

        while (listIterator.hasNext()){
            System.out.println(listIterator.next());
        }

        while (listIterator.hasPrevious()){
            System.out.println(listIterator.previous());
        }

    }

}

class Person{
    private String name;

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

    public String say(){
       return "Hello, my name is " + name;
    }
}